<?php

require_once('test_base.php');
require_once('test_util.php');

use Google\Protobuf\Internal\RepeatedField;
use Google\Protobuf\Internal\MapField;
use Google\Protobuf\Internal\GPBType;
use Foo\Test32Fields;
use Foo\TestEnum;
use Foo\TestIncludeNamespaceMessage;
use Foo\TestIncludePrefixMessage;
use Foo\TestSpecialCharacters;
use Foo\TestMessage;
use Foo\TestMessage\Sub;
use Foo\TestMessage\NestedEnum;
use Foo\TestReverseFieldOrder;
use Foo\testLowerCaseMessage;
use Foo\testLowerCaseEnum;
use PBEmpty\PBEcho\TestEmptyPackage;
use Php\Test\TestNamespace;

# This is not allowed, but we at least shouldn't crash.
class C extends \Google\Protobuf\Internal\Message
{
    public function __construct($data = null)
    {
        parent::__construct($data);
    }
}

# This is not allowed, but we at least shouldn't crash.
class TestMessageMockProxy extends TestMessage
{
    public $_proxy_data = null;

    public function __construct($data = null)
    {
        $this->_proxy_data = $data;
        // bypass parent constructor
        // This is common behavior by phpunit ond other mock/proxy libraries
    }
}

class GeneratedClassTest extends TestBase
{
    private $orig_level;

    /**
     * @before
     */
    public function setErrorLevel()
    {
        $this->orig_level = error_reporting();
    }

    /**
     * @after
     */
    public function restoreErrorLevel()
    {
        error_reporting($this->orig_level);
    }

    #########################################################
    # Test field accessors.
    #########################################################

    public function testSetterGetter()
    {
        $m = new TestMessage();
        $m->setOptionalInt32(1);
        $this->assertSame(1, $m->getOptionalInt32());
    }

    #########################################################
    # Test int32 field.
    #########################################################

    public function testInt32Field()
    {
        $m = new TestMessage();

        // Set integer.
        $m->setOptionalInt32(MAX_INT32);
        $this->assertSame(MAX_INT32, $m->getOptionalInt32());
        $m->setOptionalInt32(MIN_INT32);
        $this->assertSame(MIN_INT32, $m->getOptionalInt32());

        // Set float.
        @$m->setOptionalInt32(1.1);
        $this->assertSame(1, $m->getOptionalInt32());
        $m->setOptionalInt32(MAX_INT32_FLOAT);
        $this->assertSame(MAX_INT32, $m->getOptionalInt32());
        $m->setOptionalInt32(MIN_INT32_FLOAT);
        $this->assertSame(MIN_INT32, $m->getOptionalInt32());

        // Set string.
        $m->setOptionalInt32('2');
        $this->assertSame(2, $m->getOptionalInt32());
        @$m->setOptionalInt32('3.1');
        $this->assertSame(3, $m->getOptionalInt32());
        $m->setOptionalInt32(MAX_INT32_STRING);
        $this->assertSame(MAX_INT32, $m->getOptionalInt32());
        $m->setOptionalInt32(MIN_INT32_STRING);
        $this->assertSame(MIN_INT32, $m->getOptionalInt32());
    }

    #########################################################
    # Test deprecated int32 field.
    #########################################################

    public function testDeprecatedInt32Field()
    {
        $m = new TestMessage();

        // temporarily change error handler to capture the deprecated errors
        $deprecationCount = 0;
        set_error_handler(function ($errno, $errstr) use (&$deprecationCount) {
            if ($errstr === 'deprecated_optional_int32 is deprecated.') {
                $deprecationCount++;
            }
        }, E_USER_DEPRECATED);

        // default test set
        $m->setDeprecatedOptionalInt32(MAX_INT32);
        $this->assertSame(MAX_INT32, $m->getDeprecatedOptionalInt32());
        $m->setDeprecatedOptionalInt32(MIN_INT32);
        $this->assertSame(MIN_INT32, $m->getDeprecatedOptionalInt32());

        restore_error_handler();

        $this->assertSame(4, $deprecationCount);
    }

    public function testDeprecatedFieldGetterDoesNotThrowWarning()
    {
        // temporarily change error handler to capture the deprecated errors
        $deprecationCount = 0;
        set_error_handler(function ($errno, $errstr) use (&$deprecationCount) {
            if (false !== strpos($errstr, ' is deprecated.')) {
                $deprecationCount++;
            }
        }, E_USER_DEPRECATED);

        // does not throw warning
        $message = new TestMessage();
        $message->getDeprecatedInt32();
        $message->getDeprecatedOptionalInt32();
        $message->getDeprecatedInt32ValueUnwrapped(); // wrapped field
        $message->getDeprecatedInt32Value(); // wrapped field
        $message->getDeprecatedOneofInt32(); // oneof field
        $message->getDeprecatedOneof(); // oneof field
        $message->getDeprecatedRepeatedInt32(); // repeated field
        $message->getDeprecatedMapInt32Int32(); // map field
        $message->getDeprecatedAny(); // any field
        $message->getDeprecatedMessage(); // message field
        $message->getDeprecatedEnum(); // enum field

        restore_error_handler();

        $this->assertEquals(0, $deprecationCount);
    }

    public function testDeprecatedFieldSetterDoesNotThrowWarningForRepeatedAndMapFieldsWithEmptyArrays()
    {
        // temporarily change error handler to capture the deprecated errors
        $deprecationCount = 0;
        set_error_handler(function ($errno, $errstr) use (&$deprecationCount) {
            if (false !== strpos($errstr, ' is deprecated.')) {
                $deprecationCount++;
            }
        }, E_USER_DEPRECATED);


        // This behavior exists because otherwise the deprecation is thrown on serializeToJsonString
        $message = new TestMessage();
        $message->setDeprecatedRepeatedInt32([]); // repeated field
        $message->setDeprecatedMapInt32Int32([]); // map field

        restore_error_handler();

        $this->assertEquals(0, $deprecationCount);
    }

    public function testDeprecatedFieldGetterThrowsWarningWithValue()
    {
        $message = new TestMessage([
            'deprecated_int32' => 1,
            'deprecated_optional_int32' => 1,
            'deprecated_int32_value' => new \Google\Protobuf\Int32Value(['value' => 1]),
            'deprecated_oneof_int32' => 1,
            'deprecated_repeated_int32' => [1],
            'deprecated_map_int32_int32' => [1 => 1],
            'deprecated_any' => new \Google\Protobuf\Any(['type_url' => 'foo', 'value' => 'bar']),
            'deprecated_message' => new TestMessage(),
            'deprecated_enum' => 1,
        ]);

        // temporarily change error handler to capture the deprecated errors
        $deprecationCount = 0;
        set_error_handler(function ($errno, $errstr) use (&$deprecationCount) {
            if (false !== strpos($errstr, ' is deprecated.')) {
                $deprecationCount++;
            }
        }, E_USER_DEPRECATED);

        $message->getDeprecatedInt32();
        $message->getDeprecatedOptionalInt32();
        $message->getDeprecatedInt32ValueUnwrapped(); // wrapped field unwrapped
        $message->getDeprecatedInt32Value(); // wrapped field
        $message->getDeprecatedOneofInt32(); // oneof field
        $message->getDeprecatedRepeatedInt32(); // repeated field
        $message->getDeprecatedMapInt32Int32(); // map field
        $message->getDeprecatedAny(); // any field
        $message->getDeprecatedMessage(); // message field
        $message->getDeprecatedEnum(); // enum field

        // oneof field (should never warn)
        $message->getDeprecatedOneof();

        restore_error_handler();

        $this->assertEquals(10, $deprecationCount);
    }

    public function testDeprecatedFieldWarningsOnSerialize()
    {
        set_error_handler(function ($errno, $errstr) {
            if (false !== strpos($errstr, ' is deprecated.')) {
                throw new \Exception($errstr);
            }
        }, E_USER_DEPRECATED);

        $message = new TestMessage();
        $message->serializeToJsonString();

        restore_error_handler();

        $this->assertTrue(true, 'No deprecation warning on serialize');
    }

    #########################################################
    # Test optional int32 field.
    #########################################################

    public function testOptionalInt32Field()
    {
        $m = new TestMessage();

        $this->assertFalse($m->hasTrueOptionalInt32());
        $this->assertSame(0, $m->getTrueOptionalInt32());

        // Set integer.
        $m->setTrueOptionalInt32(MAX_INT32);
        $this->assertTrue($m->hasTrueOptionalInt32());
        $this->assertSame(MAX_INT32, $m->getTrueOptionalInt32());

        // Clear integer.
        $m->clearTrueOptionalInt32();
        $this->assertFalse($m->hasTrueOptionalInt32());
        $this->assertSame(0, $m->getTrueOptionalInt32());
    }

    #########################################################
    # Test uint32 field.
    #########################################################

    public function testUint32Field()
    {
        $m = new TestMessage();

        // Set integer.
        if (PHP_INT_SIZE !== 4) {
            // 32-bit systems throw "TypeError: Argument #1 must be of type int, float given"
            $m->setOptionalUint32(MAX_UINT32);
            $this->assertSame(-1, $m->getOptionalUint32());
        }
        $m->setOptionalUint32(-1);
        $this->assertSame(-1, $m->getOptionalUint32());
        $m->setOptionalUint32(MIN_UINT32);
        $this->assertSame(MIN_INT32, $m->getOptionalUint32());

        // Set float.
        @$m->setOptionalUint32(1.1);
        $this->assertSame(1, $m->getOptionalUint32());
        if (PHP_INT_SIZE !== 4) {
            // 32-bit systems throw "TypeError: Argument #1 must be of type int, float given"
            $m->setOptionalUint32(MAX_UINT32_FLOAT);
            $this->assertSame(-1, $m->getOptionalUint32());
        }
        $m->setOptionalUint32(-1.0);
        $this->assertSame(-1, $m->getOptionalUint32());
        $m->setOptionalUint32(MIN_UINT32_FLOAT);
        $this->assertSame(MIN_INT32, $m->getOptionalUint32());

        // Set string.
        $m->setOptionalUint32('2');
        $this->assertSame(2, $m->getOptionalUint32());
        @$m->setOptionalUint32('3.1');
        $this->assertSame(3, $m->getOptionalUint32());
        if (PHP_INT_SIZE !== 4) {
            // 32-bit systems throw "TypeError: Argument #1 must be of type int, float given"
            $m->setOptionalUint32(MAX_UINT32_STRING);
            $this->assertSame(-1, $m->getOptionalUint32());
        }
        $m->setOptionalUint32('-1.0');
        $this->assertSame(-1, $m->getOptionalUint32());
        $m->setOptionalUint32(MIN_UINT32_STRING);
        $this->assertSame(MIN_INT32, $m->getOptionalUint32());
    }

    #########################################################
    # Test int64 field.
    #########################################################

    public function testInt64Field()
    {
        $m = new TestMessage();

        // Set integer.
        $m->setOptionalInt64(MAX_INT64);
        $this->assertSame(MAX_INT64, $m->getOptionalInt64());
        $m->setOptionalInt64(MIN_INT64);
        $this->assertEquals(MIN_INT64, $m->getOptionalInt64());

        // Set float.
        @$m->setOptionalInt64(1.1);
        if (PHP_INT_SIZE == 4) {
            $this->assertSame('1', $m->getOptionalInt64());
        } else {
            $this->assertSame(1, $m->getOptionalInt64());
        }

        // Set string.
        $m->setOptionalInt64('2');
        if (PHP_INT_SIZE == 4) {
            $this->assertSame('2', $m->getOptionalInt64());
        } else {
            $this->assertSame(2, $m->getOptionalInt64());
        }

        $m->setOptionalInt64('3.1');
        if (PHP_INT_SIZE == 4) {
            $this->assertSame('3', $m->getOptionalInt64());
        } else {
            $this->assertSame(3, $m->getOptionalInt64());
        }

        $m->setOptionalInt64(MAX_INT64_STRING);
        if (PHP_INT_SIZE == 4) {
            $this->assertSame(MAX_INT64_STRING, $m->getOptionalInt64());
        } else {
            $this->assertSame(MAX_INT64, $m->getOptionalInt64());
        }

        $m->setOptionalInt64(MIN_INT64_STRING);
        if (PHP_INT_SIZE == 4) {
            $this->assertSame(MIN_INT64_STRING, $m->getOptionalInt64());
        } else {
            $this->assertSame(MIN_INT64, $m->getOptionalInt64());
        }
    }

    #########################################################
    # Test uint64 field.
    #########################################################

    public function testUint64Field()
    {
        $m = new TestMessage();

        // Set integer.
        $m->setOptionalUint64(MAX_UINT64);
        if (PHP_INT_SIZE == 4) {
            $this->assertSame(MAX_UINT64_STRING, $m->getOptionalUint64());
        } else {
            $this->assertSame(MAX_UINT64, $m->getOptionalUint64());
        }

        // Set float.
        @$m->setOptionalUint64(1.1);
        if (PHP_INT_SIZE == 4) {
            $this->assertSame('1', $m->getOptionalUint64());
        } else {
            $this->assertSame(1, $m->getOptionalUint64());
        }

        // Set string.
        $m->setOptionalUint64('2');
        if (PHP_INT_SIZE == 4) {
            $this->assertSame('2', $m->getOptionalUint64());
        } else {
            $this->assertSame(2, $m->getOptionalUint64());
        }

        $m->setOptionalUint64('3.1');
        if (PHP_INT_SIZE == 4) {
            $this->assertSame('3', $m->getOptionalUint64());
        } else {
            $this->assertSame(3, $m->getOptionalUint64());
        }

        $m->setOptionalUint64(MAX_UINT64_STRING);
        if (PHP_INT_SIZE == 4) {
            $this->assertSame(MAX_UINT64_STRING, $m->getOptionalUint64());
        } else {
            $this->assertSame(MAX_UINT64, $m->getOptionalUint64());
        }
    }

    #########################################################
    # Test enum field.
    #########################################################

    public function testEnumField()
    {
        $m = new TestMessage();

        // Set enum.
        $m->setOptionalEnum(TestEnum::ONE);
        $this->assertEquals(TestEnum::ONE, $m->getOptionalEnum());

        // Set integer.
        $m->setOptionalEnum(1);
        $this->assertEquals(TestEnum::ONE, $m->getOptionalEnum());

        // Set float.
        @$m->setOptionalEnum(1.1);
        $this->assertEquals(TestEnum::ONE, $m->getOptionalEnum());

        // Set string.
        $m->setOptionalEnum("1");
        $this->assertEquals(TestEnum::ONE, $m->getOptionalEnum());

        // Test Enum methods
        $this->assertEquals('ONE', TestEnum::name(1));
        $this->assertEquals(1, TestEnum::value('ONE'));
        $this->assertEquals('ECHO', TestEnum::name(3));
        $this->assertEquals(3, TestEnum::value('ECHO'));
        // Backwards compat value lookup by prefixed-name.
        $this->assertEquals(3, TestEnum::value('PBECHO'));
    }

    public function testInvalidEnumValueThrowsException()
    {
        $this->expectException(UnexpectedValueException::class);
        $this->expectExceptionMessage(
            'Enum Foo\TestEnum has no name defined for value -1');

        TestEnum::name(-1);
    }

    public function testInvalidEnumNameThrowsException()
    {
        $this->expectException(UnexpectedValueException::class);
        $this->expectExceptionMessage(
            'Enum Foo\TestEnum has no value defined for name DOES_NOT_EXIST');

        TestEnum::value('DOES_NOT_EXIST');
    }

    public function testNestedEnum()
    {
        $m = new TestMessage();
        $m->setOptionalNestedEnum(NestedEnum::ZERO);
        $this->assertTrue(true);
    }

    #########################################################
    # Test float field.
    #########################################################

    public function testFloatField()
    {
        $m = new TestMessage();

        // Set integer.
        $m->setOptionalFloat(1);
        $this->assertEqualsWithDelta(1.0, $m->getOptionalFloat(), MAX_FLOAT_DIFF);

        // Set float.
        $m->setOptionalFloat(1.1);
        $this->assertEqualsWithDelta(1.1, $m->getOptionalFloat(), MAX_FLOAT_DIFF);

        // Set string.
        $m->setOptionalFloat('2');
        $this->assertEqualsWithDelta(2.0, $m->getOptionalFloat(), MAX_FLOAT_DIFF);
        $m->setOptionalFloat('3.1');
        $this->assertEqualsWithDelta(3.1, $m->getOptionalFloat(), MAX_FLOAT_DIFF);
    }

    #########################################################
    # Test double field.
    #########################################################

    public function testDoubleField()
    {
        $m = new TestMessage();

        // Set integer.
        $m->setOptionalDouble(1);
        $this->assertEqualsWithDelta(1.0, $m->getOptionalDouble(), MAX_FLOAT_DIFF);

        // Set float.
        $m->setOptionalDouble(1.1);
        $this->assertEqualsWithDelta(1.1, $m->getOptionalDouble(), MAX_FLOAT_DIFF);

        // Set string.
        $m->setOptionalDouble('2');
        $this->assertEqualsWithDelta(2.0, $m->getOptionalDouble(), MAX_FLOAT_DIFF);
        $m->setOptionalDouble('3.1');
        $this->assertEqualsWithDelta(3.1, $m->getOptionalDouble(), MAX_FLOAT_DIFF);
    }

    #########################################################
    # Test bool field.
    #########################################################

    public function testBoolField()
    {
        $m = new TestMessage();

        // Set bool.
        $m->setOptionalBool(true);
        $this->assertSame(true, $m->getOptionalBool());

        // Set integer.
        $m->setOptionalBool(-1);
        $this->assertSame(true, $m->getOptionalBool());

        // Set float.
        $m->setOptionalBool(1.1);
        $this->assertSame(true, $m->getOptionalBool());

        // Set string.
        $m->setOptionalBool('');
        $this->assertSame(false, $m->getOptionalBool());
    }

    public function testBoolFromDoubleArrayConstructor()
    {
        $m = new TestMessage(['optional_bool' => -0.0]);
        $this->assertFalse($m->getOptionalBool());

        $m = new TestMessage(['optional_bool' => 0.0]);
        $this->assertFalse($m->getOptionalBool());

        $m = new TestMessage(['optional_bool' => 1.5]);
        $this->assertTrue($m->getOptionalBool());

        // Currently this generates a warning so we suppress it. In PHP 9, this will be promoted to an error and the test should be removed.
        // https://wiki.php.net/rfc/warnings-php-8-5#coercing_nan_to_other_types
        error_reporting($this->orig_level & ~E_WARNING);
        $m = new TestMessage(['optional_bool' => NAN]);
        $this->assertTrue($m->getOptionalBool());
        error_reporting($this->orig_level);

        $m = new TestMessage(['optional_bool' => INF]);
        $this->assertTrue($m->getOptionalBool());

        $m = new TestMessage(['optional_bool' => -INF]);
        $this->assertTrue($m->getOptionalBool());
    }

    public function testRepeatedBoolFromDouble()
    {
        $m  = new TestMessage();
        $rf = $m->getRepeatedBool();

        $rf[] = -0.0;
        $rf[] = 0.0;
        $rf[] = 1.5;
        // Currently this generates a warning so we suppress it. In PHP 9, this will be promoted to an error and the test should be removed.
        // https://wiki.php.net/rfc/warnings-php-8-5#coercing_nan_to_other_types
        error_reporting($this->orig_level & ~E_WARNING);
        $rf[] = NAN;
        error_reporting($this->orig_level);
        $rf[] = INF;
        $rf[] = -INF;

        $this->assertFalse($rf[0]);
        $this->assertFalse($rf[1]);
        $this->assertTrue($rf[2]);
        $this->assertTrue($rf[3]);
        $this->assertTrue($rf[4]);
        $this->assertTrue($rf[5]);
    }

    #########################################################
    # Test string field.
    #########################################################

    public function testStringField()
    {
        $m = new TestMessage();

        // Set string.
        $m->setOptionalString('abc');
        $this->assertSame('abc', $m->getOptionalString());

        // Set integer.
        $m->setOptionalString(1);
        $this->assertSame('1', $m->getOptionalString());

        // Set double.
        $m->setOptionalString(1.1);
        $this->assertSame('1.1', $m->getOptionalString());

        // Set bool.
        $m->setOptionalString(true);
        $this->assertSame('1', $m->getOptionalString());
    }

    #########################################################
    # Test invalid UTF-8
    #########################################################

    public function testInvalidUtf8StringFails()
    {
        $m = new TestMessage();

        // Invalid UTF-8 is rejected.
        $this->expectException(Exception::class);
        $m->setOptionalString("\xff");
    }

    #########################################################
    # Test bytes field.
    #########################################################

    public function testBytesField()
    {
        $m = new TestMessage();

        // Set string.
        $m->setOptionalBytes('abc');
        $this->assertSame('abc', $m->getOptionalBytes());

        // Set integer.
        $m->setOptionalBytes(1);
        $this->assertSame('1', $m->getOptionalBytes());

        // Set double.
        $m->setOptionalBytes(1.1);
        $this->assertSame('1.1', $m->getOptionalBytes());

        // Set bool.
        $m->setOptionalBytes(true);
        $this->assertSame('1', $m->getOptionalBytes());
    }

    public function testBytesFieldInvalidUTF8Success()
    {
        $m = new TestMessage();
        $m->setOptionalBytes("\xff");
        $this->assertSame("\xff", $m->getOptionalBytes());
    }

    #########################################################
    # Test message field.
    #########################################################

    public function testMessageField()
    {
        $m = new TestMessage();

        $this->assertNull($m->getOptionalMessage());

        $sub_m = new Sub();
        $sub_m->setA(1);
        $m->setOptionalMessage($sub_m);
        $this->assertSame(1, $m->getOptionalMessage()->getA());
        $this->assertTrue($m->hasOptionalMessage());

        $null = null;
        $m->setOptionalMessage($null);
        $this->assertNull($m->getOptionalMessage());
        $this->assertFalse($m->hasOptionalMessage());
    }

    #########################################################
    # Test repeated field.
    #########################################################

    public function testRepeatedField()
    {
        $m = new TestMessage();

        $repeated_int32 = new RepeatedField(GPBType::INT32);
        $m->setRepeatedInt32($repeated_int32);
        $this->assertSame($repeated_int32, $m->getRepeatedInt32());
    }

    public function testRepeatedFieldViaArray()
    {
        $m = new TestMessage();

        $arr = array();
        $m->setRepeatedInt32($arr);
        $this->assertSame(0, count($m->getRepeatedInt32()));

        $arr = array(1, 2.1, "3");
        $m->setRepeatedInt32($arr);
        $this->assertTrue($m->getRepeatedInt32() instanceof RepeatedField);
        $this->assertSame("Google\Protobuf\RepeatedField",
                          get_class($m->getRepeatedInt32()));
        $this->assertSame(3, count($m->getRepeatedInt32()));
        $this->assertSame(1, $m->getRepeatedInt32()[0]);
        $this->assertSame(2, $m->getRepeatedInt32()[1]);
        $this->assertSame(3, $m->getRepeatedInt32()[2]);
        $this->assertFalse($arr instanceof RepeatedField);
    }

    #########################################################
    # Test map field.
    #########################################################

    public function testMapField()
    {
        $m = new TestMessage();

        $map_int32_int32 = new MapField(GPBType::INT32, GPBType::INT32);
        $m->setMapInt32Int32($map_int32_int32);
        $this->assertSame($map_int32_int32, $m->getMapInt32Int32());
    }

    public function testMapFieldViaArray()
    {
        $m = new TestMessage();

        $dict = array();
        $m->setMapInt32Int32($dict);
        $this->assertSame(0, count($m->getMapInt32Int32()));

        $dict = array(5 => 5, 6 => 6.1, "7" => "7");
        $m->setMapInt32Int32($dict);
        $this->assertTrue($m->getMapInt32Int32() instanceof MapField);
        $this->assertSame(3, count($m->getMapInt32Int32()));
        $this->assertSame(5, $m->getMapInt32Int32()[5]);
        $this->assertSame(6, $m->getMapInt32Int32()[6]);
        $this->assertSame(7, $m->getMapInt32Int32()[7]);
        $this->assertFalse($dict instanceof MapField);
    }

    #########################################################
    # Test oneof field.
    #########################################################

    public function testOneofField() {
        $m = new TestMessage();

        $this->assertSame("", $m->getMyOneof());

        $m->setOneofInt32(1);
        $this->assertSame(1, $m->getOneofInt32());
        $this->assertSame(0.0, $m->getOneofFloat());
        $this->assertSame('', $m->getOneofString());
        $this->assertSame(NULL, $m->getOneofMessage());
        $this->assertSame("oneof_int32", $m->getMyOneof());

        $m->setOneofFloat(2.0);
        $this->assertSame(0, $m->getOneofInt32());
        $this->assertSame(2.0, $m->getOneofFloat());
        $this->assertSame('', $m->getOneofString());
        $this->assertSame(NULL, $m->getOneofMessage());
        $this->assertSame("oneof_float", $m->getMyOneof());

        $m->setOneofString('abc');
        $this->assertSame(0, $m->getOneofInt32());
        $this->assertSame(0.0, $m->getOneofFloat());
        $this->assertSame('abc', $m->getOneofString());
        $this->assertSame(NULL, $m->getOneofMessage());
        $this->assertSame("oneof_string", $m->getMyOneof());

        $sub_m = new Sub();
        $sub_m->setA(1);
        $m->setOneofMessage($sub_m);
        $this->assertSame(0, $m->getOneofInt32());
        $this->assertSame(0.0, $m->getOneofFloat());
        $this->assertSame('', $m->getOneofString());
        $this->assertSame(1, $m->getOneofMessage()->getA());
        $this->assertSame("oneof_message", $m->getMyOneof());
    }

    #########################################################
    # Test clear method.
    #########################################################

    public function testMessageClear()
    {
        $m = new TestMessage();
        $this->setFields($m);
        $this->expectFields($m);
        $m->clear();
        $this->expectEmptyFields($m);
    }

    #########################################################
    # Test mergeFrom method.
    #########################################################

    public function testMessageMergeFrom()
    {
        $m = new TestMessage();
        $this->setFields($m);
        $this->expectFields($m);
        $arr = $m->getOptionalMessage()->getB();
        $arr[] = 1;

        $n = new TestMessage();

        // Singular
        $n->setOptionalInt32(100);
        $sub1 = new Sub();
        $sub1->setA(101);

        $b = $sub1->getB();
        $b[] = 102;
        $sub1->setB($b);

        $n->setOptionalMessage($sub1);

        // Repeated
        $repeatedInt32 = $n->getRepeatedInt32();
        $repeatedInt32[] = 200;
        $n->setRepeatedInt32($repeatedInt32);

        $repeatedString = $n->getRepeatedString();
        $repeatedString[] = 'abc';
        $n->setRepeatedString($repeatedString);

        $sub2 = new Sub();
        $sub2->setA(201);
        $repeatedMessage = $n->getRepeatedMessage();
        $repeatedMessage[] = $sub2;
        $n->setRepeatedMessage($repeatedMessage);

        // Map
        $mapInt32Int32 = $n->getMapInt32Int32();
        $mapInt32Int32[1] = 300;
        $mapInt32Int32[-62] = 301;
        $n->setMapInt32Int32($mapInt32Int32);

        $mapStringString = $n->getMapStringString();
        $mapStringString['def'] = 'def';
        $n->setMapStringString($mapStringString);

        $mapInt32Message = $n->getMapInt32Message();
        $mapInt32Message[1] = new Sub();
        $mapInt32Message[1]->setA(302);
        $mapInt32Message[2] = new Sub();
        $mapInt32Message[2]->setA(303);
        $n->setMapInt32Message($mapInt32Message);

        $m->mergeFrom($n);

        $this->assertSame(100, $m->getOptionalInt32());
        $this->assertSame(42, $m->getOptionalUint32());
        $this->assertSame(101, $m->getOptionalMessage()->getA());
        $this->assertSame(2, count($m->getOptionalMessage()->getB()));
        $this->assertSame(1, $m->getOptionalMessage()->getB()[0]);
        $this->assertSame(102, $m->getOptionalMessage()->getB()[1]);

        $this->assertSame(3, count($m->getRepeatedInt32()));
        $this->assertSame(200, $m->getRepeatedInt32()[2]);
        $this->assertSame(2, count($m->getRepeatedUint32()));
        $this->assertSame(3, count($m->getRepeatedString()));
        $this->assertSame('abc', $m->getRepeatedString()[2]);
        $this->assertSame(3, count($m->getRepeatedMessage()));
        $this->assertSame(201, $m->getRepeatedMessage()[2]->getA());

        $this->assertSame(2, count($m->getMapInt32Int32()));
        $this->assertSame(300, $m->getMapInt32Int32()[1]);
        $this->assertSame(301, $m->getMapInt32Int32()[-62]);
        $this->assertSame(1, count($m->getMapUint32Uint32()));
        $this->assertSame(2, count($m->getMapStringString()));
        $this->assertSame('def', $m->getMapStringString()['def']);

        $this->assertSame(2, count($m->getMapInt32Message()));
        $this->assertSame(302, $m->getMapInt32Message()[1]->getA());
        $this->assertSame(303, $m->getMapInt32Message()[2]->getA());

        $this->assertSame("", $m->getMyOneof());

        // Check sub-messages are copied by value.
        $n->getOptionalMessage()->setA(-101);
        $this->assertSame(101, $m->getOptionalMessage()->getA());

        $repeatedMessage = $n->getRepeatedMessage();
        $repeatedMessage[0]->setA(-201);
        $n->setRepeatedMessage($repeatedMessage);
        $this->assertSame(201, $m->getRepeatedMessage()[2]->getA());

        $mapInt32Message = $n->getMapInt32Message();
        $mapInt32Message[1]->setA(-302);
        $n->setMapInt32Message($mapInt32Message);

        $this->assertSame(302, $m->getMapInt32Message()[1]->getA());

        // Test merge oneof.
        $m = new TestMessage();

        $n = new TestMessage();
        $n->setOneofInt32(1);
        $m->mergeFrom($n);
        $this->assertSame(1, $m->getOneofInt32());

        $sub = new Sub();
        $n->setOneofMessage($sub);
        $n->getOneofMessage()->setA(400);
        $m->mergeFrom($n);
        $this->assertSame(400, $m->getOneofMessage()->getA());
        $n->getOneofMessage()->setA(-400);
        $this->assertSame(400, $m->getOneofMessage()->getA());

        // Test all fields
        $m = new TestMessage();
        $n = new TestMessage();
        $this->setFields($m);
        $n->mergeFrom($m);
        $this->expectFields($n);
    }

    #########################################################
    # Test message/enum without namespace.
    #########################################################

    public function testMessageWithoutNamespace()
    {
        $m = new TestMessage();
        $n = new NoNamespaceMessage();
        $m->setOptionalNoNamespaceMessage($n);
        $repeatedNoNamespaceMessage = $m->getRepeatedNoNamespaceMessage();
        $repeatedNoNamespaceMessage[] = new NoNamespaceMessage();
        $m->setRepeatedNoNamespaceMessage($repeatedNoNamespaceMessage);

        // test nested messages
        $sub = new NoNamespaceMessage\NestedMessage();
        $n->setNestedMessage($sub);

        $this->assertTrue(true);
    }

    public function testEnumWithoutNamespace()
    {
        $m = new TestMessage();
        $m->setOptionalNoNamespaceEnum(NoNamespaceEnum::VALUE_A);
        $repeatedNoNamespaceEnum = $m->getRepeatedNoNamespaceEnum();
        $repeatedNoNamespaceEnum[] = NoNamespaceEnum::VALUE_A;
        $m->setRepeatedNoNamespaceEnum($repeatedNoNamespaceEnum);
        $this->assertTrue(true);
    }

    #########################################################
    # Test message with given namespace.
    #########################################################

    public function testNestedMessagesAndEnums()
    {
        $m = new TestMessage();
        $n = new TestMessage\Sub();
        $m->setOptionalMessage($n);
        $m->setOptionalNestedEnum(TestMessage\NestedEnum::ZERO);
        $this->assertSame($n, $m->getOptionalMessage());
        $this->assertSame(TestMessage\NestedEnum::ZERO, $m->getOptionalNestedEnum());
    }

    public function testMessagesAndEnumsWithPrefix()
    {
        // Test message prefix
        $m = new TestIncludePrefixMessage();
        $n = new PrefixTestPrefix();
        $n->setA(1);
        $m->setPrefixMessage($n);
        $this->assertSame(1, $m->getPrefixMessage()->getA());

        // Test nested message prefix
        $o = new PrefixTestPrefix();
        $p = new PrefixTestPrefix\PrefixNestedMessage();
        $o->setNestedMessage($p);
        $o->setNestedEnum(PrefixTestPrefix\PrefixNestedEnum::ZERO);
        $this->assertSame($p, $o->getNestedMessage());
        $this->assertSame(PrefixTestPrefix\PrefixNestedEnum::ZERO, $o->getNestedEnum());
    }

    public function testMessagesAndEnumsWithPhpNamespace()
    {
        $m = new TestNamespace();
        $n = new TestNamespace\NestedMessage();
        $m->setNestedMessage($n);
        $m->setNestedEnum(TestNamespace\NestedEnum::ZERO);
        $this->assertSame($n, $m->getNestedMessage());
        $this->assertSame(TestNamespace\NestedEnum::ZERO, $m->getNestedEnum());
    }

    public function testMessagesAndEnumsWithEmptyPhpNamespace()
    {
        $m = new TestEmptyNamespace();
        $n = new TestEmptyNamespace\NestedMessage();
        $m->setNestedMessage($n);
        $m->setNestedEnum(TestEmptyNamespace\NestedEnum::ZERO);
        $this->assertSame($n, $m->getNestedMessage());
        $this->assertSame(TestEmptyNamespace\NestedEnum::ZERO, $m->getNestedEnum());
    }

    public function testMessagesAndEnumsWithNoNamespace()
    {
        $m = new NoNamespaceMessage();
        $n = new NoNamespaceMessage\NestedMessage();
        $m->setNestedMessage($n);
        $m->setNestedEnum(NoNamespaceMessage\NestedEnum::ZERO);
        $this->assertSame($n, $m->getNestedMessage());
        $this->assertSame(NoNamespaceMessage\NestedEnum::ZERO, $m->getNestedEnum());
    }

    public function testReservedWordsInPackageName()
    {
        $m = new TestEmptyPackage();
        $n = new TestEmptyPackage\NestedMessage();
        $m->setNestedMessage($n);
        $m->setNestedEnum(TestEmptyPackage\NestedEnum::ZERO);
        $this->assertSame($n, $m->getNestedMessage());
        $this->assertSame(TestEmptyPackage\NestedEnum::ZERO, $m->getNestedEnum());
    }

    public function testReservedWordsInNamespace()
    {
        $m = new TestNamespace();
        $n = new TestNamespace\PBEmpty();
        $o = new TestNamespace\PBEmpty\NestedMessage();
        $n->setNestedMessage($o);
        $n->setNestedEnum(TestNamespace\PBEmpty\NestedEnum::ZERO);
        $m->setReservedName($n);
        $this->assertSame($n, $m->getReservedName());
        $this->assertSame($o, $n->getNestedMessage());
        $this->assertSame(
            TestNamespace\PBEmpty\NestedEnum::ZERO,
            $n->getNestedEnum()
        );
    }

    #########################################################
    # Test prefix for reserved words.
    #########################################################

    public function testPrefixForReservedWords()
    {
        $m = new \Foo\TestMessage\PBEmpty();
        $m = new \Foo\PBEmpty();
        $m = new \PrefixEmpty();
        $m = new \Foo\PBARRAY();

        // BEGIN RESERVED NAMES
        // @see php/update_reserved_words.sh - DO NOT MODIFY THIS LIST MANUALLY
        $m = new \Lower\PBabstract();
        $m = new \Lower\PBand();
        $m = new \Lower\PBarray();
        $m = new \Lower\PBas();
        $m = new \Lower\PBbool();
        $m = new \Lower\PBbreak();
        $m = new \Lower\PBcallable();
        $m = new \Lower\PBcase();
        $m = new \Lower\PBcatch();
        $m = new \Lower\PBclass();
        $m = new \Lower\PBclone();
        $m = new \Lower\PBconst();
        $m = new \Lower\PBcontinue();
        $m = new \Lower\PBdeclare();
        $m = new \Lower\PBdefault();
        $m = new \Lower\PBdie();
        $m = new \Lower\PBdo();
        $m = new \Lower\PBecho();
        $m = new \Lower\PBelse();
        $m = new \Lower\PBelseif();
        $m = new \Lower\PBempty();
        $m = new \Lower\PBenddeclare();
        $m = new \Lower\PBendfor();
        $m = new \Lower\PBendforeach();
        $m = new \Lower\PBendif();
        $m = new \Lower\PBendswitch();
        $m = new \Lower\PBendwhile();
        $m = new \Lower\PBeval();
        $m = new \Lower\PBexit();
        $m = new \Lower\PBextends();
        $m = new \Lower\PBfalse();
        $m = new \Lower\PBfinal();
        $m = new \Lower\PBfinally();
        $m = new \Lower\PBfloat();
        $m = new \Lower\PBfn();
        $m = new \Lower\PBfor();
        $m = new \Lower\PBforeach();
        $m = new \Lower\PBfunction();
        $m = new \Lower\PBglobal();
        $m = new \Lower\PBgoto();
        $m = new \Lower\PBif();
        $m = new \Lower\PBimplements();
        $m = new \Lower\PBinclude();
        $m = new \Lower\PBinclude_once();
        $m = new \Lower\PBinstanceof();
        $m = new \Lower\PBinsteadof();
        $m = new \Lower\PBint();
        $m = new \Lower\PBinterface();
        $m = new \Lower\PBisset();
        $m = new \Lower\PBiterable();
        $m = new \Lower\PBlist();
        $m = new \Lower\PBmatch();
        $m = new \Lower\PBmixed();
        $m = new \Lower\PBnamespace();
        $m = new \Lower\PBnever();
        $m = new \Lower\PBnew();
        $m = new \Lower\PBnull();
        $m = new \Lower\PBobject();
        $m = new \Lower\PBor();
        $m = new \Lower\PBparent();
        $m = new \Lower\PBprint();
        $m = new \Lower\PBprivate();
        $m = new \Lower\PBprotected();
        $m = new \Lower\PBpublic();
        $m = new \Lower\PBreadonly();
        $m = new \Lower\PBrequire();
        $m = new \Lower\PBrequire_once();
        $m = new \Lower\PBreturn();
        $m = new \Lower\PBself();
        $m = new \Lower\PBstatic();
        $m = new \Lower\PBstring();
        $m = new \Lower\PBswitch();
        $m = new \Lower\PBthrow();
        $m = new \Lower\PBtrait();
        $m = new \Lower\PBtrue();
        $m = new \Lower\PBtry();
        $m = new \Lower\PBunset();
        $m = new \Lower\PBuse();
        $m = new \Lower\PBvar();
        $m = new \Lower\PBvoid();
        $m = new \Lower\PBwhile();
        $m = new \Lower\PBxor();
        $m = new \Lower\PByield();

        $m = new \Upper\PBABSTRACT();
        $m = new \Upper\PBAND();
        $m = new \Upper\PBARRAY();
        $m = new \Upper\PBAS();
        $m = new \Upper\PBBOOL();
        $m = new \Upper\PBBREAK();
        $m = new \Upper\PBCALLABLE();
        $m = new \Upper\PBCASE();
        $m = new \Upper\PBCATCH();
        $m = new \Upper\PBCLASS();
        $m = new \Upper\PBCLONE();
        $m = new \Upper\PBCONST();
        $m = new \Upper\PBCONTINUE();
        $m = new \Upper\PBDECLARE();
        $m = new \Upper\PBDEFAULT();
        $m = new \Upper\PBDIE();
        $m = new \Upper\PBDO();
        $m = new \Upper\PBECHO();
        $m = new \Upper\PBELSE();
        $m = new \Upper\PBELSEIF();
        $m = new \Upper\PBEMPTY();
        $m = new \Upper\PBENDDECLARE();
        $m = new \Upper\PBENDFOR();
        $m = new \Upper\PBENDFOREACH();
        $m = new \Upper\PBENDIF();
        $m = new \Upper\PBENDSWITCH();
        $m = new \Upper\PBENDWHILE();
        $m = new \Upper\PBEVAL();
        $m = new \Upper\PBEXIT();
        $m = new \Upper\PBEXTENDS();
        $m = new \Upper\PBFALSE();
        $m = new \Upper\PBFINAL();
        $m = new \Upper\PBFINALLY();
        $m = new \Upper\PBFLOAT();
        $m = new \Upper\PBFN();
        $m = new \Upper\PBFOR();
        $m = new \Upper\PBFOREACH();
        $m = new \Upper\PBFUNCTION();
        $m = new \Upper\PBGLOBAL();
        $m = new \Upper\PBGOTO();
        $m = new \Upper\PBIF();
        $m = new \Upper\PBIMPLEMENTS();
        $m = new \Upper\PBINCLUDE();
        $m = new \Upper\PBINCLUDE_ONCE();
        $m = new \Upper\PBINSTANCEOF();
        $m = new \Upper\PBINSTEADOF();
        $m = new \Upper\PBINT();
        $m = new \Upper\PBINTERFACE();
        $m = new \Upper\PBISSET();
        $m = new \Upper\PBITERABLE();
        $m = new \Upper\PBLIST();
        $m = new \Upper\PBMATCH();
        $m = new \Upper\PBMIXED();
        $m = new \Upper\PBNAMESPACE();
        $m = new \Upper\PBNEVER();
        $m = new \Upper\PBNEW();
        $m = new \Upper\PBNULL();
        $m = new \Upper\PBOBJECT();
        $m = new \Upper\PBOR();
        $m = new \Upper\PBPARENT();
        $m = new \Upper\PBPRINT();
        $m = new \Upper\PBPRIVATE();
        $m = new \Upper\PBPROTECTED();
        $m = new \Upper\PBPUBLIC();
        $m = new \Upper\PBREADONLY();
        $m = new \Upper\PBREQUIRE();
        $m = new \Upper\PBREQUIRE_ONCE();
        $m = new \Upper\PBRETURN();
        $m = new \Upper\PBSELF();
        $m = new \Upper\PBSTATIC();
        $m = new \Upper\PBSTRING();
        $m = new \Upper\PBSWITCH();
        $m = new \Upper\PBTHROW();
        $m = new \Upper\PBTRAIT();
        $m = new \Upper\PBTRUE();
        $m = new \Upper\PBTRY();
        $m = new \Upper\PBUNSET();
        $m = new \Upper\PBUSE();
        $m = new \Upper\PBVAR();
        $m = new \Upper\PBVOID();
        $m = new \Upper\PBWHILE();
        $m = new \Upper\PBXOR();
        $m = new \Upper\PBYIELD();

        $m = new \Lower_enum\PBabstract();
        $m = new \Lower_enum\PBand();
        $m = new \Lower_enum\PBarray();
        $m = new \Lower_enum\PBas();
        $m = new \Lower_enum\PBbool();
        $m = new \Lower_enum\PBbreak();
        $m = new \Lower_enum\PBcallable();
        $m = new \Lower_enum\PBcase();
        $m = new \Lower_enum\PBcatch();
        $m = new \Lower_enum\PBclass();
        $m = new \Lower_enum\PBclone();
        $m = new \Lower_enum\PBconst();
        $m = new \Lower_enum\PBcontinue();
        $m = new \Lower_enum\PBdeclare();
        $m = new \Lower_enum\PBdefault();
        $m = new \Lower_enum\PBdie();
        $m = new \Lower_enum\PBdo();
        $m = new \Lower_enum\PBecho();
        $m = new \Lower_enum\PBelse();
        $m = new \Lower_enum\PBelseif();
        $m = new \Lower_enum\PBempty();
        $m = new \Lower_enum\PBenddeclare();
        $m = new \Lower_enum\PBendfor();
        $m = new \Lower_enum\PBendforeach();
        $m = new \Lower_enum\PBendif();
        $m = new \Lower_enum\PBendswitch();
        $m = new \Lower_enum\PBendwhile();
        $m = new \Lower_enum\PBeval();
        $m = new \Lower_enum\PBexit();
        $m = new \Lower_enum\PBextends();
        $m = new \Lower_enum\PBfalse();
        $m = new \Lower_enum\PBfinal();
        $m = new \Lower_enum\PBfinally();
        $m = new \Lower_enum\PBfloat();
        $m = new \Lower_enum\PBfn();
        $m = new \Lower_enum\PBfor();
        $m = new \Lower_enum\PBforeach();
        $m = new \Lower_enum\PBfunction();
        $m = new \Lower_enum\PBglobal();
        $m = new \Lower_enum\PBgoto();
        $m = new \Lower_enum\PBif();
        $m = new \Lower_enum\PBimplements();
        $m = new \Lower_enum\PBinclude();
        $m = new \Lower_enum\PBinclude_once();
        $m = new \Lower_enum\PBinstanceof();
        $m = new \Lower_enum\PBinsteadof();
        $m = new \Lower_enum\PBint();
        $m = new \Lower_enum\PBinterface();
        $m = new \Lower_enum\PBisset();
        $m = new \Lower_enum\PBiterable();
        $m = new \Lower_enum\PBlist();
        $m = new \Lower_enum\PBmatch();
        $m = new \Lower_enum\PBmixed();
        $m = new \Lower_enum\PBnamespace();
        $m = new \Lower_enum\PBnever();
        $m = new \Lower_enum\PBnew();
        $m = new \Lower_enum\PBnull();
        $m = new \Lower_enum\PBobject();
        $m = new \Lower_enum\PBor();
        $m = new \Lower_enum\PBparent();
        $m = new \Lower_enum\PBprint();
        $m = new \Lower_enum\PBprivate();
        $m = new \Lower_enum\PBprotected();
        $m = new \Lower_enum\PBpublic();
        $m = new \Lower_enum\PBreadonly();
        $m = new \Lower_enum\PBrequire();
        $m = new \Lower_enum\PBrequire_once();
        $m = new \Lower_enum\PBreturn();
        $m = new \Lower_enum\PBself();
        $m = new \Lower_enum\PBstatic();
        $m = new \Lower_enum\PBstring();
        $m = new \Lower_enum\PBswitch();
        $m = new \Lower_enum\PBthrow();
        $m = new \Lower_enum\PBtrait();
        $m = new \Lower_enum\PBtrue();
        $m = new \Lower_enum\PBtry();
        $m = new \Lower_enum\PBunset();
        $m = new \Lower_enum\PBuse();
        $m = new \Lower_enum\PBvar();
        $m = new \Lower_enum\PBvoid();
        $m = new \Lower_enum\PBwhile();
        $m = new \Lower_enum\PBxor();
        $m = new \Lower_enum\PByield();

        $m = new \Upper_enum\PBABSTRACT();
        $m = new \Upper_enum\PBAND();
        $m = new \Upper_enum\PBARRAY();
        $m = new \Upper_enum\PBAS();
        $m = new \Upper_enum\PBBOOL();
        $m = new \Upper_enum\PBBREAK();
        $m = new \Upper_enum\PBCALLABLE();
        $m = new \Upper_enum\PBCASE();
        $m = new \Upper_enum\PBCATCH();
        $m = new \Upper_enum\PBCLASS();
        $m = new \Upper_enum\PBCLONE();
        $m = new \Upper_enum\PBCONST();
        $m = new \Upper_enum\PBCONTINUE();
        $m = new \Upper_enum\PBDECLARE();
        $m = new \Upper_enum\PBDEFAULT();
        $m = new \Upper_enum\PBDIE();
        $m = new \Upper_enum\PBDO();
        $m = new \Upper_enum\PBECHO();
        $m = new \Upper_enum\PBELSE();
        $m = new \Upper_enum\PBELSEIF();
        $m = new \Upper_enum\PBEMPTY();
        $m = new \Upper_enum\PBENDDECLARE();
        $m = new \Upper_enum\PBENDFOR();
        $m = new \Upper_enum\PBENDFOREACH();
        $m = new \Upper_enum\PBENDIF();
        $m = new \Upper_enum\PBENDSWITCH();
        $m = new \Upper_enum\PBENDWHILE();
        $m = new \Upper_enum\PBEVAL();
        $m = new \Upper_enum\PBEXIT();
        $m = new \Upper_enum\PBEXTENDS();
        $m = new \Upper_enum\PBFALSE();
        $m = new \Upper_enum\PBFINAL();
        $m = new \Upper_enum\PBFINALLY();
        $m = new \Upper_enum\PBFLOAT();
        $m = new \Upper_enum\PBFN();
        $m = new \Upper_enum\PBFOR();
        $m = new \Upper_enum\PBFOREACH();
        $m = new \Upper_enum\PBFUNCTION();
        $m = new \Upper_enum\PBGLOBAL();
        $m = new \Upper_enum\PBGOTO();
        $m = new \Upper_enum\PBIF();
        $m = new \Upper_enum\PBIMPLEMENTS();
        $m = new \Upper_enum\PBINCLUDE();
        $m = new \Upper_enum\PBINCLUDE_ONCE();
        $m = new \Upper_enum\PBINSTANCEOF();
        $m = new \Upper_enum\PBINSTEADOF();
        $m = new \Upper_enum\PBINT();
        $m = new \Upper_enum\PBINTERFACE();
        $m = new \Upper_enum\PBISSET();
        $m = new \Upper_enum\PBITERABLE();
        $m = new \Upper_enum\PBLIST();
        $m = new \Upper_enum\PBMATCH();
        $m = new \Upper_enum\PBMIXED();
        $m = new \Upper_enum\PBNAMESPACE();
        $m = new \Upper_enum\PBNEVER();
        $m = new \Upper_enum\PBNEW();
        $m = new \Upper_enum\PBNULL();
        $m = new \Upper_enum\PBOBJECT();
        $m = new \Upper_enum\PBOR();
        $m = new \Upper_enum\PBPARENT();
        $m = new \Upper_enum\PBPRINT();
        $m = new \Upper_enum\PBPRIVATE();
        $m = new \Upper_enum\PBPROTECTED();
        $m = new \Upper_enum\PBPUBLIC();
        $m = new \Upper_enum\PBREADONLY();
        $m = new \Upper_enum\PBREQUIRE();
        $m = new \Upper_enum\PBREQUIRE_ONCE();
        $m = new \Upper_enum\PBRETURN();
        $m = new \Upper_enum\PBSELF();
        $m = new \Upper_enum\PBSTATIC();
        $m = new \Upper_enum\PBSTRING();
        $m = new \Upper_enum\PBSWITCH();
        $m = new \Upper_enum\PBTHROW();
        $m = new \Upper_enum\PBTRAIT();
        $m = new \Upper_enum\PBTRUE();
        $m = new \Upper_enum\PBTRY();
        $m = new \Upper_enum\PBUNSET();
        $m = new \Upper_enum\PBUSE();
        $m = new \Upper_enum\PBVAR();
        $m = new \Upper_enum\PBVOID();
        $m = new \Upper_enum\PBWHILE();
        $m = new \Upper_enum\PBXOR();
        $m = new \Upper_enum\PBYIELD();

        $m = \Lower_enum_value\NotAllowed::PBabstract;
        $m = \Lower_enum_value\NotAllowed::PBand;
        $m = \Lower_enum_value\NotAllowed::PBarray;
        $m = \Lower_enum_value\NotAllowed::PBas;
        $m = \Lower_enum_value\NotAllowed::bool;
        $m = \Lower_enum_value\NotAllowed::PBbreak;
        $m = \Lower_enum_value\NotAllowed::PBcallable;
        $m = \Lower_enum_value\NotAllowed::PBcase;
        $m = \Lower_enum_value\NotAllowed::PBcatch;
        $m = \Lower_enum_value\NotAllowed::PBclass;
        $m = \Lower_enum_value\NotAllowed::PBclone;
        $m = \Lower_enum_value\NotAllowed::PBconst;
        $m = \Lower_enum_value\NotAllowed::PBcontinue;
        $m = \Lower_enum_value\NotAllowed::PBdeclare;
        $m = \Lower_enum_value\NotAllowed::PBdefault;
        $m = \Lower_enum_value\NotAllowed::PBdie;
        $m = \Lower_enum_value\NotAllowed::PBdo;
        $m = \Lower_enum_value\NotAllowed::PBecho;
        $m = \Lower_enum_value\NotAllowed::PBelse;
        $m = \Lower_enum_value\NotAllowed::PBelseif;
        $m = \Lower_enum_value\NotAllowed::PBempty;
        $m = \Lower_enum_value\NotAllowed::PBenddeclare;
        $m = \Lower_enum_value\NotAllowed::PBendfor;
        $m = \Lower_enum_value\NotAllowed::PBendforeach;
        $m = \Lower_enum_value\NotAllowed::PBendif;
        $m = \Lower_enum_value\NotAllowed::PBendswitch;
        $m = \Lower_enum_value\NotAllowed::PBendwhile;
        $m = \Lower_enum_value\NotAllowed::PBeval;
        $m = \Lower_enum_value\NotAllowed::PBexit;
        $m = \Lower_enum_value\NotAllowed::PBextends;
        $m = \Lower_enum_value\NotAllowed::false;
        $m = \Lower_enum_value\NotAllowed::PBfinal;
        $m = \Lower_enum_value\NotAllowed::PBfinally;
        $m = \Lower_enum_value\NotAllowed::float;
        $m = \Lower_enum_value\NotAllowed::PBfn;
        $m = \Lower_enum_value\NotAllowed::PBfor;
        $m = \Lower_enum_value\NotAllowed::PBforeach;
        $m = \Lower_enum_value\NotAllowed::PBfunction;
        $m = \Lower_enum_value\NotAllowed::PBglobal;
        $m = \Lower_enum_value\NotAllowed::PBgoto;
        $m = \Lower_enum_value\NotAllowed::PBif;
        $m = \Lower_enum_value\NotAllowed::PBimplements;
        $m = \Lower_enum_value\NotAllowed::PBinclude;
        $m = \Lower_enum_value\NotAllowed::PBinclude_once;
        $m = \Lower_enum_value\NotAllowed::PBinstanceof;
        $m = \Lower_enum_value\NotAllowed::PBinsteadof;
        $m = \Lower_enum_value\NotAllowed::int;
        $m = \Lower_enum_value\NotAllowed::PBinterface;
        $m = \Lower_enum_value\NotAllowed::PBisset;
        $m = \Lower_enum_value\NotAllowed::iterable;
        $m = \Lower_enum_value\NotAllowed::PBlist;
        $m = \Lower_enum_value\NotAllowed::PBmatch;
        $m = \Lower_enum_value\NotAllowed::mixed;
        $m = \Lower_enum_value\NotAllowed::PBnamespace;
        $m = \Lower_enum_value\NotAllowed::never;
        $m = \Lower_enum_value\NotAllowed::PBnew;
        $m = \Lower_enum_value\NotAllowed::null;
        $m = \Lower_enum_value\NotAllowed::object;
        $m = \Lower_enum_value\NotAllowed::PBor;
        $m = \Lower_enum_value\NotAllowed::parent;
        $m = \Lower_enum_value\NotAllowed::PBprint;
        $m = \Lower_enum_value\NotAllowed::PBprivate;
        $m = \Lower_enum_value\NotAllowed::PBprotected;
        $m = \Lower_enum_value\NotAllowed::PBpublic;
        $m = \Lower_enum_value\NotAllowed::readonly;
        $m = \Lower_enum_value\NotAllowed::PBrequire;
        $m = \Lower_enum_value\NotAllowed::PBrequire_once;
        $m = \Lower_enum_value\NotAllowed::PBreturn;
        $m = \Lower_enum_value\NotAllowed::self;
        $m = \Lower_enum_value\NotAllowed::PBstatic;
        $m = \Lower_enum_value\NotAllowed::string;
        $m = \Lower_enum_value\NotAllowed::PBswitch;
        $m = \Lower_enum_value\NotAllowed::PBthrow;
        $m = \Lower_enum_value\NotAllowed::PBtrait;
        $m = \Lower_enum_value\NotAllowed::true;
        $m = \Lower_enum_value\NotAllowed::PBtry;
        $m = \Lower_enum_value\NotAllowed::PBunset;
        $m = \Lower_enum_value\NotAllowed::PBuse;
        $m = \Lower_enum_value\NotAllowed::PBvar;
        $m = \Lower_enum_value\NotAllowed::void;
        $m = \Lower_enum_value\NotAllowed::PBwhile;
        $m = \Lower_enum_value\NotAllowed::PBxor;
        $m = \Lower_enum_value\NotAllowed::PByield;

        $m = \Upper_enum_value\NotAllowed::PBABSTRACT;
        $m = \Upper_enum_value\NotAllowed::PBAND;
        $m = \Upper_enum_value\NotAllowed::PBARRAY;
        $m = \Upper_enum_value\NotAllowed::PBAS;
        $m = \Upper_enum_value\NotAllowed::BOOL;
        $m = \Upper_enum_value\NotAllowed::PBBREAK;
        $m = \Upper_enum_value\NotAllowed::PBCALLABLE;
        $m = \Upper_enum_value\NotAllowed::PBCASE;
        $m = \Upper_enum_value\NotAllowed::PBCATCH;
        $m = \Upper_enum_value\NotAllowed::PBCLASS;
        $m = \Upper_enum_value\NotAllowed::PBCLONE;
        $m = \Upper_enum_value\NotAllowed::PBCONST;
        $m = \Upper_enum_value\NotAllowed::PBCONTINUE;
        $m = \Upper_enum_value\NotAllowed::PBDECLARE;
        $m = \Upper_enum_value\NotAllowed::PBDEFAULT;
        $m = \Upper_enum_value\NotAllowed::PBDIE;
        $m = \Upper_enum_value\NotAllowed::PBDO;
        $m = \Upper_enum_value\NotAllowed::PBECHO;
        $m = \Upper_enum_value\NotAllowed::PBELSE;
        $m = \Upper_enum_value\NotAllowed::PBELSEIF;
        $m = \Upper_enum_value\NotAllowed::PBEMPTY;
        $m = \Upper_enum_value\NotAllowed::PBENDDECLARE;
        $m = \Upper_enum_value\NotAllowed::PBENDFOR;
        $m = \Upper_enum_value\NotAllowed::PBENDFOREACH;
        $m = \Upper_enum_value\NotAllowed::PBENDIF;
        $m = \Upper_enum_value\NotAllowed::PBENDSWITCH;
        $m = \Upper_enum_value\NotAllowed::PBENDWHILE;
        $m = \Upper_enum_value\NotAllowed::PBEVAL;
        $m = \Upper_enum_value\NotAllowed::PBEXIT;
        $m = \Upper_enum_value\NotAllowed::PBEXTENDS;
        $m = \Upper_enum_value\NotAllowed::FALSE;
        $m = \Upper_enum_value\NotAllowed::PBFINAL;
        $m = \Upper_enum_value\NotAllowed::PBFINALLY;
        $m = \Upper_enum_value\NotAllowed::FLOAT;
        $m = \Upper_enum_value\NotAllowed::PBFN;
        $m = \Upper_enum_value\NotAllowed::PBFOR;
        $m = \Upper_enum_value\NotAllowed::PBFOREACH;
        $m = \Upper_enum_value\NotAllowed::PBFUNCTION;
        $m = \Upper_enum_value\NotAllowed::PBGLOBAL;
        $m = \Upper_enum_value\NotAllowed::PBGOTO;
        $m = \Upper_enum_value\NotAllowed::PBIF;
        $m = \Upper_enum_value\NotAllowed::PBIMPLEMENTS;
        $m = \Upper_enum_value\NotAllowed::PBINCLUDE;
        $m = \Upper_enum_value\NotAllowed::PBINCLUDE_ONCE;
        $m = \Upper_enum_value\NotAllowed::PBINSTANCEOF;
        $m = \Upper_enum_value\NotAllowed::PBINSTEADOF;
        $m = \Upper_enum_value\NotAllowed::INT;
        $m = \Upper_enum_value\NotAllowed::PBINTERFACE;
        $m = \Upper_enum_value\NotAllowed::PBISSET;
        $m = \Upper_enum_value\NotAllowed::ITERABLE;
        $m = \Upper_enum_value\NotAllowed::PBLIST;
        $m = \Upper_enum_value\NotAllowed::PBMATCH;
        $m = \Upper_enum_value\NotAllowed::MIXED;
        $m = \Upper_enum_value\NotAllowed::PBNAMESPACE;
        $m = \Upper_enum_value\NotAllowed::NEVER;
        $m = \Upper_enum_value\NotAllowed::PBNEW;
        $m = \Upper_enum_value\NotAllowed::NULL;
        $m = \Upper_enum_value\NotAllowed::OBJECT;
        $m = \Upper_enum_value\NotAllowed::PBOR;
        $m = \Upper_enum_value\NotAllowed::PARENT;
        $m = \Upper_enum_value\NotAllowed::PBPRINT;
        $m = \Upper_enum_value\NotAllowed::PBPRIVATE;
        $m = \Upper_enum_value\NotAllowed::PBPROTECTED;
        $m = \Upper_enum_value\NotAllowed::PBPUBLIC;
        $m = \Upper_enum_value\NotAllowed::READONLY;
        $m = \Upper_enum_value\NotAllowed::PBREQUIRE;
        $m = \Upper_enum_value\NotAllowed::PBREQUIRE_ONCE;
        $m = \Upper_enum_value\NotAllowed::PBRETURN;
        $m = \Upper_enum_value\NotAllowed::SELF;
        $m = \Upper_enum_value\NotAllowed::PBSTATIC;
        $m = \Upper_enum_value\NotAllowed::STRING;
        $m = \Upper_enum_value\NotAllowed::PBSWITCH;
        $m = \Upper_enum_value\NotAllowed::PBTHROW;
        $m = \Upper_enum_value\NotAllowed::PBTRAIT;
        $m = \Upper_enum_value\NotAllowed::TRUE;
        $m = \Upper_enum_value\NotAllowed::PBTRY;
        $m = \Upper_enum_value\NotAllowed::PBUNSET;
        $m = \Upper_enum_value\NotAllowed::PBUSE;
        $m = \Upper_enum_value\NotAllowed::PBVAR;
        $m = \Upper_enum_value\NotAllowed::VOID;
        $m = \Upper_enum_value\NotAllowed::PBWHILE;
        $m = \Upper_enum_value\NotAllowed::PBXOR;
        $m = \Upper_enum_value\NotAllowed::PBYIELD;
        // END RESERVED NAMES

        $this->assertTrue(true);
    }

    #########################################################
    # Test fluent setters.
    #########################################################

    public function testFluentSetters()
    {
        $m = (new TestMessage())
            ->setOptionalInt32(1)
            ->setOptionalUInt32(2);
        $this->assertSame(1, $m->getOptionalInt32());
        $this->assertSame(2, $m->getOptionalUInt32());
    }

    #########################################################
    # Test Reverse Field Order.
    #########################################################

    public function testReverseFieldOrder()
    {
        $m = new TestReverseFieldOrder();
        $m->setB("abc");
        $this->assertSame("abc", $m->getB());
        $this->assertNotSame("abc", $m->getA());
    }

    #########################################################
    # Test Reverse Field Order.
    #########################################################

    public function testLowerCase()
    {
        $m = new testLowerCaseMessage();
        $n = testLowerCaseEnum::VALUE;
        $this->assertTrue(true);
    }

    #########################################################
    # Test Array Constructor.
    #########################################################

    public function testArrayConstructor()
    {
        $m = new TestMessage([
            'optional_int32' => -42,
            'optional_int64' => -43,
            'optional_uint32' => 42,
            'optional_uint64' => 43,
            'optional_sint32' => -44,
            'optional_sint64' => -45,
            'optional_fixed32' => 46,
            'optional_fixed64' => 47,
            'optional_sfixed32' => -46,
            'optional_sfixed64' => -47,
            'optional_float' => 1.5,
            'optional_double' => 1.6,
            'optional_bool' => true,
            'optional_string' => 'a',
            'optional_bytes' => 'bbbb',
            'optional_enum' => TestEnum::ONE,
            'optional_message' => new Sub([
                'a' => 33
            ]),
            'repeated_int32' => [-42, -52],
            'repeated_int64' => [-43, -53],
            'repeated_uint32' => [42, 52],
            'repeated_uint64' => [43, 53],
            'repeated_sint32' => [-44, -54],
            'repeated_sint64' => [-45, -55],
            'repeated_fixed32' => [46, 56],
            'repeated_fixed64' => [47, 57],
            'repeated_sfixed32' => [-46, -56],
            'repeated_sfixed64' => [-47, -57],
            'repeated_float' => [1.5, 2.5],
            'repeated_double' => [1.6, 2.6],
            'repeated_bool' => [true, false],
            'repeated_string' => ['a', 'c'],
            'repeated_bytes' => ['bbbb', 'dddd'],
            'repeated_enum' => [TestEnum::ZERO, TestEnum::ONE],
            'repeated_message' => [new Sub(['a' => 34]),
                                   new Sub(['a' => 35])],
            'map_int32_int32' => [-62 => -62],
            'map_int64_int64' => [-63 => -63],
            'map_uint32_uint32' => [62 => 62],
            'map_uint64_uint64' => [63 => 63],
            'map_sint32_sint32' => [-64 => -64],
            'map_sint64_sint64' => [-65 => -65],
            'map_fixed32_fixed32' => [66 => 66],
            'map_fixed64_fixed64' => [67 => 67],
            'map_sfixed32_sfixed32' => [-68 => -68],
            'map_sfixed64_sfixed64' => [-69 => -69],
            'map_int32_float' => [1 => 3.5],
            'map_int32_double' => [1 => 3.6],
            'map_bool_bool' => [true => true],
            'map_string_string' => ['e' => 'e'],
            'map_int32_bytes' => [1 => 'ffff'],
            'map_int32_enum' => [1 => TestEnum::ONE],
            'map_int32_message' => [1 => new Sub(['a' => 36])],
        ]);

        TestUtil::assertTestMessage($m);
        $this->assertTrue(true);
    }

    public function testReferenceInArrayConstructor()
    {
        $keys = [[
                    'optional_bool' => true,
                    'repeated_bool' => [true],
                    'map_bool_bool' => [true => true],
                    'optional_double' => 1.0,
                    'repeated_double' => [1.0],
                    'map_int32_double' => [1 => 1.0],
                    'optional_int32' => 1,
                    'repeated_int32' => [1],
                    'map_int32_int32' => [1 => 1],
                    'optional_string' => 'a',
                    'repeated_string' => ['a'],
                    'map_string_string' => ['a' => 'a'],
                    'optional_message' => ['a' => 1],
                    'repeated_message' => [['a' => 1]],
                    'map_int32_message' => [1 => ['a' => 1]],
                ]];

        foreach ($keys as &$key) {
            foreach ($key as $id => &$value) {
                if ($id === 'repeated_bool') {
                    foreach ($value as &$element) {
                    }
                }
                if ($id === 'map_bool_bool') {
                    foreach ($value as $mapKey => &$element) {
                    }
                }
                if ($id === 'repeated_double') {
                    foreach ($value as &$element) {
                    }
                }
                if ($id === 'map_int32_double') {
                    foreach ($value as $mapKey => &$element) {
                    }
                }
                if ($id === 'repeated_int32') {
                    foreach ($value as &$element) {
                    }
                }
                if ($id === 'map_int32_int32') {
                    foreach ($value as $mapKey => &$element) {
                    }
                }
                if ($id === 'repeated_string') {
                    foreach ($value as &$element) {
                    }
                }
                if ($id === 'map_string_string') {
                    foreach ($value as $mapKey => &$element) {
                    }
                }
                if ($id === 'optional_message') {
                    $value = new Sub($value);
                }
                if ($id === 'repeated_message') {
                    foreach ($value as &$element) {
                        $element = new Sub($element);
                    }
                }
                if ($id === 'map_int32_message') {
                    foreach ($value as $mapKey => &$element) {
                        $element = new Sub($element);
                    }
                }
            }
            $key = new TestMessage($key);
        }

        $this->assertTrue(true);
    }

    public function testOneofMessageInArrayConstructor()
    {
        $m = new TestMessage([
            'oneof_message' => new Sub(),
        ]);
        $this->assertSame('oneof_message', $m->getMyOneof());
        $this->assertNotNull($m->getOneofMessage());

        $this->assertTrue(true);
    }

    public function testOneofStringInArrayConstructor()
    {
        $m = new TestMessage([
            'oneof_string' => 'abc',
        ]);

        $this->assertTrue(true);
    }

    public function testOptionalValueConstructor()
    {
        $m = new TestMessage([
            'optional_message' => new Sub([
                'a' => 1
            ]),
            'true_optional_message' => null,
            'repeated_message' => [
                new Sub(['a' => 2]),
                new Sub(['a' => 3])
            ],
        ]);

        $this->assertFalse($m->hasTrueOptionalMessage());
        $this->assertNull($m->getTrueOptionalMessage());

        $this->assertEquals(1, $m->getOptionalMessage()->getA());
        $this->assertCount(2, $m->getRepeatedMessage());
    }

    #########################################################
    # Test clone.
    #########################################################

    public function testClone()
    {
        $m = new TestMessage([
            'optional_int32' => -42,
            'optional_int64' => -43,
            'optional_message' => new Sub([
                'a' => 33
            ]),
            'map_int32_message' => [1 => new Sub(['a' => 36])],
        ]);
        $m2 = clone $m;
        $this->assertEquals($m->getOptionalInt32(), $m2->getOptionalInt32());
        $this->assertEquals($m->getOptionalInt64(), $m2->getOptionalInt64());
        $this->assertSame($m->getOptionalMessage(), $m2->getOptionalMessage());
        $this->assertSame($m->getMapInt32Message()[1], $m2->getMapInt32Message()[1]);
        $this->assertEquals($m->serializeToJsonString(), $m2->serializeToJsonString());
    }

    #########################################################
    # Test message equals.
    #########################################################

    public function testMessageEquals()
    {
        $m = new TestMessage();
        TestUtil::setTestMessage($m);
        $n = new TestMessage();
        TestUtil::setTestMessage($n);
        $this->assertEquals($m, $n);
    }

    #########################################################
    # Test reference of value
    #########################################################

    public function testValueIsReference()
    {
        // Bool element
        $values = [true];
        array_walk($values, function (&$value) {});
        $m = new TestMessage();
        $m->setOptionalBool($values[0]);

        // Int32 element
        $values = [1];
        array_walk($values, function (&$value) {});
        $m = new TestMessage();
        $m->setOptionalInt32($values[0]);

        // Double element
        $values = [1.0];
        array_walk($values, function (&$value) {});
        $m = new TestMessage();
        $m->setOptionalDouble($values[0]);

        // String element
        $values = ['a'];
        array_walk($values, function (&$value) {});
        $m = new TestMessage();
        $m->setOptionalString($values[0]);

        $this->assertTrue(true);
    }

    #########################################################
    # Test equality
    #########################################################

    public function testShallowEquality()
    {
        $m1 = new TestMessage([
            'optional_int32' => -42,
            'optional_int64' => -43,
            'optional_uint32' => 42,
            'optional_uint64' => 43,
            'optional_sint32' => -44,
            'optional_sint64' => -45,
            'optional_fixed32' => 46,
            'optional_fixed64' => 47,
            'optional_sfixed32' => -46,
            'optional_sfixed64' => -47,
            'optional_float' => 1.5,
            'optional_double' => 1.6,
            'optional_bool' => true,
            'optional_string' => 'a',
            'optional_bytes' => 'bbbb',
            'optional_enum' => TestEnum::ONE,
            ]);
        $data = $m1->serializeToString();
        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $this->assertTrue($m1 == $m2);

        $m1->setOptionalInt32(1234);
        $this->assertTrue($m1 != $m2);
    }

    public function testDeepEquality()
    {
        $m1 = new TestMessage([
            'optional_int32' => -42,
            'optional_int64' => -43,
            'optional_uint32' => 42,
            'optional_uint64' => 43,
            'optional_sint32' => -44,
            'optional_sint64' => -45,
            'optional_fixed32' => 46,
            'optional_fixed64' => 47,
            'optional_sfixed32' => -46,
            'optional_sfixed64' => -47,
            'optional_float' => 1.5,
            'optional_double' => 1.6,
            'optional_bool' => true,
            'optional_string' => 'a',
            'optional_bytes' => 'bbbb',
            'optional_enum' => TestEnum::ONE,
            'optional_message' => new Sub([
                'a' => 33
            ]),
            'repeated_int32' => [-42, -52],
            'repeated_int64' => [-43, -53],
            'repeated_uint32' => [42, 52],
            'repeated_uint64' => [43, 53],
            'repeated_sint32' => [-44, -54],
            'repeated_sint64' => [-45, -55],
            'repeated_fixed32' => [46, 56],
            'repeated_fixed64' => [47, 57],
            'repeated_sfixed32' => [-46, -56],
            'repeated_sfixed64' => [-47, -57],
            'repeated_float' => [1.5, 2.5],
            'repeated_double' => [1.6, 2.6],
            'repeated_bool' => [true, false],
            'repeated_string' => ['a', 'c'],
            'repeated_bytes' => ['bbbb', 'dddd'],
            'repeated_enum' => [TestEnum::ZERO, TestEnum::ONE],
            'repeated_message' => [new Sub(['a' => 34]),
                                   new Sub(['a' => 35])],
            'map_int32_int32' => [-62 => -62],
            'map_int64_int64' => [-63 => -63],
            'map_uint32_uint32' => [62 => 62],
            'map_uint64_uint64' => [63 => 63],
            'map_sint32_sint32' => [-64 => -64],
            'map_sint64_sint64' => [-65 => -65],
            'map_fixed32_fixed32' => [66 => 66],
            'map_fixed64_fixed64' => [67 => 67],
            'map_sfixed32_sfixed32' => [-68 => -68],
            'map_sfixed64_sfixed64' => [-69 => -69],
            'map_int32_float' => [1 => 3.5],
            'map_int32_double' => [1 => 3.6],
            'map_bool_bool' => [true => true],
            'map_string_string' => ['e' => 'e'],
            'map_int32_bytes' => [1 => 'ffff'],
            'map_int32_enum' => [1 => TestEnum::ONE],
            'map_int32_message' => [1 => new Sub(['a' => 36])],
        ]);
        $data = $m1->serializeToString();

        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $this->assertTrue($m1 == $m2);

        # Nested sub-message is checked.
        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $m2->getOptionalMessage()->setA(1234);
        $this->assertTrue($m1 != $m2);

        # Repeated field element is checked.
        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $m2->getRepeatedInt32()[0] = 1234;
        $this->assertTrue($m1 != $m2);

        # Repeated field length is checked.
        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $m2->getRepeatedInt32()[] = 1234;
        $this->assertTrue($m1 != $m2);

        # SubMessage inside repeated field is checked.
        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $m2->getRepeatedMessage()[0]->setA(1234);
        $this->assertTrue($m1 != $m2);

        # Map value is checked.
        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $m2->getMapInt32Int32()[-62] = 1234;
        $this->assertTrue($m1 != $m2);

        # Map size is checked.
        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $m2->getMapInt32Int32()[1234] = 1234;
        $this->assertTrue($m1 != $m2);

        # SubMessage inside map field is checked.
        $m2 = new TestMessage();
        $m2->mergeFromString($data);
        $m2->getMapInt32Message()[1]->setA(1234);
        $this->assertTrue($m1 != $m2);

        # TODO: what about unknown fields?
    }

    #########################################################
    # Test hasOneof<Field> methods exists and working
    #########################################################

    public function testHasOneof() {
        $m = new TestMessage();
        $this->assertFalse($m->hasOneofInt32());
        $m->setOneofInt32(42);
        $this->assertTrue($m->hasOneofInt32());
        $m->setOneofString("bar");
        $this->assertFalse($m->hasOneofInt32());
        $this->assertTrue($m->hasOneofString());
        $m->clear();
        $this->assertFalse($m->hasOneofInt32());
        $this->assertFalse($m->hasOneofString());

        $sub_m = new Sub();
        $sub_m->setA(1);
        $m->setOneofMessage($sub_m);
        $this->assertTrue($m->hasOneofMessage());
        $m->setOneofMessage(null);
        $this->assertFalse($m->hasOneofMessage());
    }

    #########################################################
    # Test that we don't crash if users create their own messages.
    #########################################################

    public function testUserDefinedClass() {
        if (getenv("USE_ZEND_ALLOC") === "0") {
            // We're running a memory test. This test appears to leak in a way
            // we cannot control, PHP bug?
            //
            // TODO: investigate further.
            $this->markTestSkipped();
            return;
        }

        # This is not allowed, but at least we shouldn't crash.
        $this->expectException(Exception::class);
        new C();
    }

    #########################################################
    # Test no segfault when error happens
    #########################################################

    function throwIntendedException()
    {
        throw new Exception('Intended');
    }
    public function testNoSegfaultWithError()
    {
        if (getenv("USE_ZEND_ALLOC") === "0") {
            // We're running a memory test. This test appears to leak in a way
            // we cannot control, PHP bug?
            //
            // TODO: investigate further.
            $this->markTestSkipped();
            return;
        }
        $this->expectException(Exception::class);

        new TestMessage(['optional_int32' => $this->throwIntendedException()]);
    }

    public function testNoSegfaultWithContructorBypass()
    {
        if (!extension_loaded('protobuf')) {
            $this->markTestSkipped('PHP Protobuf extension is not loaded');
        }

        $this->expectException(Exception::class);
        $this->expectExceptionMessage(
            "Couldn't find descriptor. " .
            "The message constructor was likely bypassed, resulting in an uninitialized descriptor."
        );

        $m = new TestMessageMockProxy(['optional_int32' => 123]);

        /**
         * At this point the message constructor was bypassed and the descriptor is not initialized.
         * This is a common PHP pattern where a proxy/mock class extends a concrete class,
         * frequently used in frameworks like PHPUnit, phpspec, and Mockery.
         *
         * When this happens, the message's internal descriptor is never initialized.
         *
         * Without proper handling, accessing properties via getters (like $this->getOptionalInt32())
         * would cause the C extension to segfault when trying to access the uninitialized descriptor.
         *
         * Instead of segfaulting, we now detect this uninitialized state and throw an exception.
         *
         * See: https://github.com/protocolbuffers/protobuf/issues/19978
         */

        $m->getOptionalInt32();
    }

    public function testNoExceptionWithVarDump()
    {
        $m = new Sub(['a' => 1]);
        /*
         * This line currently segfaults on macOS with:
         *
         *    frame #0: 0x00000001029936cc xdebug.so`xdebug_zend_hash_is_recursive + 4
         *    frame #1: 0x00000001029a6736 xdebug.so`xdebug_var_export_text_ansi + 1006
         *    frame #2: 0x00000001029a715d xdebug.so`xdebug_get_zval_value_text_ansi + 273
         *    frame #3: 0x000000010298a441 xdebug.so`zif_xdebug_var_dump + 297
         *    frame #4: 0x000000010298d558 xdebug.so`xdebug_execute_internal + 640
         *    frame #5: 0x000000010046d47f php`ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER + 364
         *    frame #6: 0x000000010043cabc php`execute_ex + 44
         *    frame #7: 0x000000010298d151 xdebug.so`xdebug_execute_ex + 1662
         *    frame #8: 0x000000010046d865 php`ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER + 426
         *
         * The value we are passing to var_dump() appears to be corrupt somehow.
         */
        /* var_dump($m); */

        $this->assertTrue(true);
    }

    public function testIssue9440()
    {
        $m = new Test32Fields();
        $m->setId(8);
        $this->assertEquals(8, $m->getId());
        $m->setVersion('1');
        $this->assertEquals(8, $m->getId());
    }

    public function testSpecialCharacters()
    {
        $reflectionMethod = new \ReflectionMethod(TestSpecialCharacters::class, 'getA');
        $docComment = $reflectionMethod->getDocComment();
        $commentLines = explode("\n", $docComment);
        $this->assertEquals('/**', array_shift($commentLines));
        $this->assertEquals('     */', array_pop($commentLines));
        $docComment = implode("\n", $commentLines);
        // test special characters
        $this->assertStringContainsString(";,/?:&=+$-_.!~*'()", $docComment);
        // test open doc comment
        $this->assertStringContainsString('/*', $docComment);
        // test escaped closed doc comment
        $this->assertStringNotContainsString('*/', $docComment);
        $this->assertStringContainsString('{@*}', $docComment);
        // test escaped at-sign
        $this->assertStringContainsString('\@foo', $docComment);
        // test forwardslash on new line
        $this->assertStringContainsString("* /\n", $docComment);
    }
}