# 2018-02-26
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing expressions of the form
#
#        x IS TRUE
#        x IS FALSE
#        x IS NOT TRUE
#        x IS NOT FALSE
#
# Tests are also included for the use of TRUE and FALSE as
# literal values.

set testdir [file dirname $argv0]
source $testdir/tester.tcl

do_execsql_test istrue-100 {
  CREATE TABLE t1(x INTEGER PRIMARY KEY, y BOOLEAN);
  INSERT INTO t1 VALUES(1, true),(2, false),(3, null);
  SELECT x FROM t1 WHERE y IS TRUE;
} {1}
do_execsql_test istrue-110 {
  SELECT x FROM t1 WHERE y IS FALSE;
} {2}
do_execsql_test istrue-120 {
  SELECT x FROM t1 WHERE y IS NULL;
} {3}
do_execsql_test istrue-130 {
  SELECT x FROM t1 WHERE y IS NOT TRUE;
} {2 3}
do_execsql_test istrue-140 {
  SELECT x FROM t1 WHERE y IS NOT FALSE;
} {1 3}
do_execsql_test istrue-150 {
  SELECT x FROM t1 WHERE y IS NOT NULL;
} {1 2}
unset -nocomplain X
set X 9
do_execsql_test istrue-160 {
  SELECT x FROM t1 WHERE y IS TRUE OR (8==$X)
} {1}
do_execsql_test istrue-170 {
  SELECT x FROM t1 WHERE y IS FALSE OR (8==$X)
} {2}
do_execsql_test istrue-180 {
  SELECT x FROM t1 WHERE y IS NULL OR (8==$X);
} {3}
do_execsql_test istrue-190 {
  SELECT x FROM t1 WHERE y IS NOT TRUE OR (8==$X);
} {2 3}
do_execsql_test istrue-200 {
  SELECT x FROM t1 WHERE y IS NOT FALSE OR (8==$X);
} {1 3}
do_execsql_test istrue-210 {
  SELECT x FROM t1 WHERE y IS NOT NULL OR (8==$X);
} {1 2}

do_execsql_test istrue-300 {
  SELECT x,
         y IS TRUE, y IS FALSE, y is NULL,
         y IS NOT TRUE, y IS NOT FALSE, y IS NOT NULL, '|'
    FROM t1 ORDER BY x;
} {1 1 0 0 0 1 1 | 2 0 1 0 1 0 1 | 3 0 0 1 1 1 0 |}

do_execsql_test istrue-400 {
  SELECT x FROM t1 WHERE true;
} {1 2 3}
do_execsql_test istrue-410 {
  SELECT x FROM t1 WHERE false;
} {}

do_execsql_test istrue-500 {
  CREATE TABLE t2(
     a INTEGER PRIMARY KEY,
     b BOOLEAN DEFAULT true,
     c BOOLEAN DEFAULT(true),
     d BOOLEAN DEFAULT false,
     e BOOLEAN DEFAULT(false)
  );
  INSERT INTO t2 DEFAULT VALUES;
  SELECT * FROM t2;
} {1 1 1 0 0}
do_execsql_test istrue-510 {
  DROP TABLE t2;
  CREATE TABLE t2(
     a INTEGER PRIMARY KEY,
     b BOOLEAN DEFAULT(not true),
     c BOOLEAN DEFAULT(not false)
  );
  INSERT INTO t2(a) VALUES(99);
  SELECT * FROM t2;
} {99 0 1}
do_execsql_test istrue-520 {
  DROP TABLE t2;
  CREATE TABLE t2(
     a INTEGER PRIMARY KEY,
     b BOOLEAN CHECK(b IS TRUE),
     c BOOLEAN CHECK(c IS FALSE),
     d BOOLEAN CHECK(d IS NOT TRUE),
     e BOOLEAN CHECK(e IS NOT FALSE)
  );
  INSERT INTO t2 VALUES(1,true,false,null,null);
  SELECT * FROM t2;
} {1 1 0 {} {}}
do_catchsql_test istrue-521 {
  INSERT INTO t2 VALUES(2,false,false,null,null);
} {1 {CHECK constraint failed: t2}}
do_catchsql_test istrue-522 {
  INSERT INTO t2 VALUES(2,true,true,null,null);
} {1 {CHECK constraint failed: t2}}
do_catchsql_test istrue-523 {
  INSERT INTO t2 VALUES(2,true,false,true,null);
} {1 {CHECK constraint failed: t2}}
do_catchsql_test istrue-524 {
  INSERT INTO t2 VALUES(2,true,false,null,false);
} {1 {CHECK constraint failed: t2}}

finish_test