test/parallel/test-config-file.js

'use strict';

const {
  isWindows,
  spawnPromisified,
  skipIfSQLiteMissing,
} = require('../common');
skipIfSQLiteMissing();
const fixtures = require('../common/fixtures');
const tmpdir = require('../common/tmpdir');
const assert = require('node:assert');
const { test, it, describe } = require('node:test');
const { chmodSync, writeFileSync, constants } = require('node:fs');
const { join } = require('node:path');

const onlyIfNodeOptionsSupport = { skip: process.config.variables.node_without_node_options };
const onlyWithAmaro = { skip: !process.config.variables.node_use_amaro };
const onlyWithAmaroAndNodeOptions = {
  skip: !process.config.variables.node_use_amaro || process.config.variables.node_without_node_options,
};
const onlyWithInspectorAndNodeOptions = {
  skip: !process.features.inspector || process.config.variables.node_without_node_options,
};

test('should handle non existing json', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--experimental-config-file=i-do-not-exist.json',
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /Cannot read configuration from i-do-not-exist\.json: no such file or directory/);
  assert.match(result.stderr, /i-do-not-exist\.json: not found/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('should handle empty json', async () => {
  const result = await spawnPromisified(process.execPath, [
    `--experimental-config-file=${fixtures.path('rc/empty.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /Can't parse/);
  assert.match(result.stderr, /empty\.json: invalid content/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('should handle empty object json', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/empty-object.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.strictEqual(result.stderr, '');
  assert.match(result.stdout, /Hello, World!/);
  assert.strictEqual(result.code, 0);
});

describe('runtime version checks', () => {
  const currentMajor = Number(process.versions.node.split('.')[0]);

  async function runConfig(config, filename = 'version-config.json') {
    tmpdir.refresh();
    const configPath = join(tmpdir.path, filename);
    writeFileSync(configPath, JSON.stringify(config));

    return spawnPromisified(process.execPath, [
      '--no-warnings',
      `--experimental-config-file=${configPath}`,
      '-p', 'http.maxHeaderSize',
    ]);
  }

  it('should accept a top-level config without nodeVersion', async () => {
    const result = await runConfig({
      nodeOptions: { 'max-http-header-size': 10 },
    }, 'top-level-without-version.json');
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '10\n');
    assert.strictEqual(result.code, 0);
  });

  it('should accept a config file matching the current Node.js version', async () => {
    const result = await runConfig({
      nodeVersion: currentMajor,
      nodeOptions: { 'max-http-header-size': 10 },
    }, 'matching-version.json');
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '10\n');
    assert.strictEqual(result.code, 0);
  });

  it('should reject a config file targeting another Node.js version', async () => {
    const result = await runConfig({
      nodeVersion: currentMajor + 1,
      nodeOptions: { 'max-http-header-size': 10 },
    }, 'mismatching-version.json');
    assert.match(result.stderr, /"nodeVersion" \d+ does not match current Node\.js version \d+/);
    assert.strictEqual(result.stdout, '');
    assert.strictEqual(result.code, 9);
  });

  it('should select a matching config from configs', async () => {
    const result = await runConfig({
      configs: [
        {
          nodeVersion: currentMajor + 1,
          config: {
            nodeOptions: { 'max-http-header-size': 20 },
          },
        },
        {
          nodeVersion: currentMajor,
          config: {
            nodeOptions: { 'max-http-header-size': 10 },
          },
        },
      ],
    }, 'versioned-configs.json');
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '10\n');
    assert.strictEqual(result.code, 0);
  });

  it('should reject configs without an entry for the current version', async () => {
    const result = await runConfig({
      configs: [
        {
          nodeVersion: currentMajor + 1,
          config: {
            nodeOptions: { 'max-http-header-size': 10 },
          },
        },
      ],
    }, 'missing-versioned-config.json');
    assert.match(result.stderr, /No config found for current Node\.js version \d+ in "configs"/);
    assert.strictEqual(result.stdout, '');
    assert.strictEqual(result.code, 9);
  });

  it('should ignore invalid config payloads for non-matching versions', async () => {
    const result = await runConfig({
      configs: [
        {
          nodeVersion: currentMajor + 1,
          config: false,
        },
        {
          nodeVersion: currentMajor,
          config: {
            nodeOptions: { 'max-http-header-size': 10 },
          },
        },
      ],
    }, 'ignored-non-matching-config.json');
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '10\n');
    assert.strictEqual(result.code, 0);
  });

  it('should use the first matching config from configs', async () => {
    const result = await runConfig({
      configs: [
        {
          nodeVersion: currentMajor,
          config: {
            nodeOptions: { 'max-http-header-size': 10 },
          },
        },
        {
          nodeVersion: currentMajor,
          config: {
            nodeOptions: { 'max-http-header-size': 20 },
          },
        },
      ],
    }, 'first-matching-versioned-config.json');
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '10\n');
    assert.strictEqual(result.code, 0);
  });

  it('should allow $schema with configs', async () => {
    const result = await runConfig({
      $schema: 'https://nodejs.org/dist/vX.Y.Z/docs/node-config-schema.json',
      configs: [
        {
          nodeVersion: currentMajor,
          config: {
            $schema: 'https://nodejs.org/dist/vX.Y.Z/docs/node-config-schema.json',
            nodeOptions: { 'max-http-header-size': 10 },
          },
        },
      ],
    }, 'schema-with-versioned-config.json');
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '10\n');
    assert.strictEqual(result.code, 0);
  });

  for (const { name, config, error } of [
    {
      name: 'configs is empty',
      config: { configs: [] },
      error: /No config found for current Node\.js version \d+ in "configs"/,
    },
    {
      name: 'configs is not an array',
      config: { configs: {} },
      error: /"configs" value unexpected .* \(should be an array\)/,
    },
    {
      name: 'configs contains a non-object entry',
      config: { configs: [false] },
      error: /"configs\[0\]" value unexpected .* \(should be an object\)/,
    },
    {
      name: 'configs entry is missing nodeVersion',
      config: { configs: [{ config: {} }] },
      error: /"configs\[0\]\.nodeVersion" is required/,
    },
    {
      name: 'configs entry has a non-integer nodeVersion',
      config: { configs: [{ nodeVersion: `${currentMajor}`, config: {} }] },
      error: /"configs\[0\]\.nodeVersion" value unexpected .* \(should be an integer\)/,
    },
    {
      name: 'matching configs entry is missing config',
      config: { configs: [{ nodeVersion: currentMajor }] },
      error: /"configs\[0\]\.config" is required/,
    },
    {
      name: 'matching configs entry has a non-object config',
      config: { configs: [{ nodeVersion: currentMajor, config: false }] },
      error: /"configs\[0\]\.config" value unexpected .* \(should be an object\)/,
    },
    {
      name: 'configs is mixed with preceding config fields',
      config: {
        nodeOptions: { 'max-http-header-size': 10 },
        configs: [{ nodeVersion: currentMajor, config: {} }],
      },
      error: /"configs" cannot be mixed with other configuration fields/,
    },
    {
      name: 'configs is mixed with following config fields',
      config: {
        configs: [{ nodeVersion: currentMajor, config: {} }],
        nodeOptions: { 'max-http-header-size': 10 },
      },
      error: /"configs" cannot be mixed with other configuration fields/,
    },
    {
      name: 'configs is nested inside a selected config',
      config: {
        configs: [{
          nodeVersion: currentMajor,
          config: { configs: [] },
        }],
      },
      error: /"configs" is not allowed inside a versioned config/,
    },
    {
      name: 'selected config targets another version',
      config: {
        configs: [{
          nodeVersion: currentMajor,
          config: {
            nodeVersion: currentMajor + 1,
            nodeOptions: { 'max-http-header-size': 10 },
          },
        }],
      },
      error: /"nodeVersion" \d+ does not match current Node\.js version \d+/,
    },
  ]) {
    it(`should reject when ${name}`, async () => {
      const result = await runConfig(config);
      assert.match(result.stderr, error);
      assert.strictEqual(result.stdout, '');
      assert.strictEqual(result.code, 9);
    });
  }
});

test('should parse boolean flag', onlyWithAmaroAndNodeOptions, async () => {
  const result = await spawnPromisified(process.execPath, [
    `--experimental-config-file=${fixtures.path('rc/strip-types.json')}`,
    fixtures.path('typescript/ts/test-typescript.ts'),
  ]);
  assert.match(result.stderr, /--experimental-config-file is an experimental feature and might change at any time/);
  assert.match(result.stdout, /Hello, TypeScript!/);
  assert.strictEqual(result.code, 0);
});

test('should parse boolean flag defaulted to true', onlyIfNodeOptionsSupport, async () => {
  const result = await spawnPromisified(process.execPath, [
    `--experimental-config-file=${fixtures.path('rc/warnings-false.json')}`,
    '-p', 'process.emitWarning("A warning")',
  ]);
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, 'undefined\n');
  assert.strictEqual(result.code, 0);
});

test('should throw an error when a flag is declared twice', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/override-property.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /Option --strip-types is already defined/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('should not override env-file', onlyWithAmaroAndNodeOptions, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/strip-types.json')}`,
    '--env-file', fixtures.path('dotenv/node-options-no-tranform.env'),
    fixtures.path('typescript/ts/test-typescript.ts'),
  ]);
  assert.match(result.stderr, /SyntaxError/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 1);
});

test('should not override NODE_OPTIONS', onlyWithAmaro, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/strip-types.json')}`,
    fixtures.path('typescript/ts/test-typescript.ts'),
  ], {
    env: {
      ...process.env,
      NODE_OPTIONS: '--no-strip-types',
    },
  });
  assert.match(result.stderr, /SyntaxError/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 1);
});

test('should not override CLI flags', onlyWithAmaro, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    '--no-strip-types',
    `--experimental-config-file=${fixtures.path('rc/strip-types.json')}`,
    fixtures.path('typescript/ts/test-typescript.ts'),
  ]);
  assert.match(result.stderr, /SyntaxError/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 1);
});

test('should parse array flag correctly', onlyIfNodeOptionsSupport, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/import.json')}`,
    '--eval', 'setTimeout(() => console.log("D"),99)',
  ]);
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, 'A\nB\nC\nD\n');
  assert.strictEqual(result.code, 0);
});

test('should validate invalid array flag', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/invalid-import.json')}`,
    '--eval', 'setTimeout(() => console.log("D"),99)',
  ]);
  assert.match(result.stderr, /invalid-import\.json: invalid content/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('should validate array flag as string', onlyIfNodeOptionsSupport, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/import-as-string.json')}`,
    '--eval', 'setTimeout(() => console.log("B"),99)',
  ]);
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, 'A\nB\n');
  assert.strictEqual(result.code, 0);
});

test('should throw at unknown flag', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/unknown-flag.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /Unknown or not allowed option some-unknown-flag for namespace nodeOptions/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('should throw at flag not available in NODE_OPTIONS', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/not-node-options-flag.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /Unknown or not allowed option test for namespace nodeOptions/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('unsigned flag should be parsed correctly', onlyIfNodeOptionsSupport, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/numeric.json')}`,
    '-p', 'http.maxHeaderSize',
  ]);
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, '4294967295\n');
  assert.strictEqual(result.code, 0);
});

test('numeric flag should not allow negative values', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/negative-numeric.json')}`,
    '-p', 'http.maxHeaderSize',
  ]);
  assert.match(result.stderr, /Invalid value for --max-http-header-size/);
  assert.match(result.stderr, /negative-numeric\.json: invalid content/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('v8 flag should not be allowed in config file', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/v8-flag.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /V8 flag --abort-on-uncaught-exception is currently not supported/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('string flag should be parsed correctly', onlyIfNodeOptionsSupport, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    '--test',
    `--experimental-config-file=${fixtures.path('rc/string.json')}`,
    fixtures.path('rc/test.js'),
  ]);
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, '.\n');
  assert.strictEqual(result.code, 0);
});

test('host port flag should be parsed correctly', onlyWithInspectorAndNodeOptions, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    '--expose-internals',
    `--experimental-config-file=${fixtures.path('rc/host-port.json')}`,
    '-p', 'require("internal/options").getOptionValue("--inspect-port").port',
  ]);
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, '65535\n');
  assert.strictEqual(result.code, 0);
});

test('--inspect=true should be parsed correctly', onlyWithInspectorAndNodeOptions, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/inspect-true.json')}`,
    '--inspect-port', '0',
    '-p', 'require("node:inspector").url()',
  ]);
  assert.match(result.stderr, /^Debugger listening on (ws:\/\/[^\s]+)/);
  assert.match(result.stdout, /ws:\/\/[^\s]+/);
  assert.strictEqual(result.code, 0);
});

test('--inspect=false should be parsed correctly', { skip: !process.features.inspector }, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/inspect-false.json')}`,
    '-p', 'require("node:inspector").url()',
  ]);
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, 'undefined\n');
  assert.strictEqual(result.code, 0);
});

test('no op flag should throw', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/no-op.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /No-op flag --http-parser is currently not supported/);
  assert.match(result.stderr, /no-op\.json: invalid content/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('should not allow users to sneak in a flag', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/sneaky-flag.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /The number of NODE_OPTIONS doesn't match the number of flags in the config file/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('non object root', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/non-object-root.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /Root value unexpected not an object for/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('non object node options', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/non-object-node-options.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /"nodeOptions" value unexpected for/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('should throw correct error when a json is broken', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/broken.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /Can't parse/);
  assert.match(result.stderr, /broken\.json: invalid content/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('broken value in node_options', async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    `--experimental-config-file=${fixtures.path('rc/broken-node-options.json')}`,
    '-p', '"Hello, World!"',
  ]);
  assert.match(result.stderr, /Can't parse/);
  assert.match(result.stderr, /broken-node-options\.json: invalid content/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

test('should use node.config.json as default', onlyIfNodeOptionsSupport, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    '--experimental-default-config-file',
    '-p', 'http.maxHeaderSize',
  ], {
    cwd: fixtures.path('rc/default'),
  });
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, '10\n');
  assert.strictEqual(result.code, 0);
});

test('should use node.config.json when --experimental-config-file has no argument',
     onlyIfNodeOptionsSupport, async () => {
       const result = await spawnPromisified(process.execPath, [
         '--no-warnings',
         '--experimental-config-file',
         '-p', 'http.maxHeaderSize',
       ], {
         cwd: fixtures.path('rc/default'),
       });
       assert.strictEqual(result.stderr, '');
       assert.strictEqual(result.stdout, '10\n');
       assert.strictEqual(result.code, 0);
     });

test('should not treat the script path as a config file argument',
     onlyIfNodeOptionsSupport, async () => {
       const result = await spawnPromisified(process.execPath, [
         '--no-warnings',
         '--experimental-config-file',
         fixtures.path('printA.js'),
       ], {
         cwd: fixtures.path('rc/default'),
       });
       assert.strictEqual(result.stderr, '');
       assert.strictEqual(result.stdout, 'A\n');
       assert.strictEqual(result.code, 0);
     });

test('should treat a space-separated config file path as the script',
     onlyIfNodeOptionsSupport, async () => {
       const result = await spawnPromisified(process.execPath, [
         '--no-warnings',
         '--experimental-config-file',
         fixtures.path('rc/empty.json'),
         fixtures.path('printA.js'),
       ], {
         cwd: fixtures.path('rc/default'),
       });
       assert.strictEqual(result.stdout, '');
       assert.match(result.stderr, /SyntaxError/);
       assert.match(result.stderr, /Unexpected end of JSON input/);
       assert.doesNotMatch(result.stderr, /Can't parse/);
       assert.doesNotMatch(result.stderr, /requires an argument/);
       assert.strictEqual(result.code, 1);
     });

test('should error when --experimental-config-file= has empty argument',
     onlyIfNodeOptionsSupport, async () => {
       const result = await spawnPromisified(process.execPath, [
         '--no-warnings',
         '--experimental-config-file=',
         '-p', 'http.maxHeaderSize',
       ], {
         cwd: fixtures.path('rc/default'),
       });
       assert.match(result.stderr, /--experimental-config-file= requires an argument/);
       assert.strictEqual(result.code, 9);
     });

test('should error when --experimental-default-config-file has an explicit argument',
     onlyIfNodeOptionsSupport, async () => {
       const result = await spawnPromisified(process.execPath, [
         '--no-warnings',
         '--experimental-default-config-file=node.config.json',
         '-p', 'http.maxHeaderSize',
       ], {
         cwd: fixtures.path('rc/default'),
       });
       assert.match(result.stderr, /--experimental-default-config-file does not take an argument/);
       assert.strictEqual(result.code, 9);
     });

test('should override node.config.json when specified', onlyIfNodeOptionsSupport, async () => {
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    '--experimental-default-config-file',
    `--experimental-config-file=${fixtures.path('rc/default/override.json')}`,
    '-p', 'http.maxHeaderSize',
  ], {
    cwd: fixtures.path('rc/default'),
  });
  assert.strictEqual(result.stderr, '');
  assert.strictEqual(result.stdout, '20\n');
  assert.strictEqual(result.code, 0);
});

test('should work with --experimental-config-file=path',
     onlyIfNodeOptionsSupport, async () => {
       const result = await spawnPromisified(process.execPath, [
         '--no-warnings',
         `--experimental-config-file=${fixtures.path('rc/default/node.config.json')}`,
         '-p', 'http.maxHeaderSize',
       ]);
       assert.strictEqual(result.stderr, '');
       assert.strictEqual(result.stdout, '10\n');
       assert.strictEqual(result.code, 0);
     });

test('should use last config file when multiple are specified',
     onlyIfNodeOptionsSupport, async () => {
       const result = await spawnPromisified(process.execPath, [
         '--no-warnings',
         `--experimental-config-file=${fixtures.path('rc/default/node.config.json')}`,
         `--experimental-config-file=${fixtures.path('rc/default/override.json')}`,
         '-p', 'http.maxHeaderSize',
       ]);
       assert.strictEqual(result.stderr, '');
       assert.strictEqual(result.stdout, '20\n');
       assert.strictEqual(result.code, 0);
     });

test('should use default when next argument starts with dash',
     onlyIfNodeOptionsSupport, async () => {
       const result = await spawnPromisified(process.execPath, [
         '--no-warnings',
         '--experimental-config-file',
         '-p', 'http.maxHeaderSize',
       ], {
         cwd: fixtures.path('rc/default'),
       });
       assert.strictEqual(result.stderr, '');
       assert.strictEqual(result.stdout, '10\n');
       assert.strictEqual(result.code, 0);
     });

// Skip on windows because it doesn't support chmod changing read permissions
// Also skip if user is root because it would have read permissions anyway
test('should throw an error when the file is non readable', {
  skip: isWindows || process.getuid() === 0,
}, async () => {
  tmpdir.refresh();
  const dest = join(tmpdir.path, 'node.config.json');
  writeFileSync(dest, JSON.stringify({
    nodeOptions: { 'max-http-header-size': 10 }
  }));
  chmodSync(dest, constants.O_RDONLY);
  const result = await spawnPromisified(process.execPath, [
    '--no-warnings',
    '--experimental-default-config-file',
    '-p', 'http.maxHeaderSize',
  ], {
    cwd: tmpdir.path,
  });
  assert.match(result.stderr, /Cannot read configuration from node\.config\.json: permission denied/);
  assert.strictEqual(result.stdout, '');
  assert.strictEqual(result.code, 9);
});

describe('namespace-scoped options', () => {
  it('should parse a namespace-scoped option correctly', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      `--experimental-config-file=${fixtures.path('rc/namespaced/node.config.json')}`,
      '--no-test',
      '-p', 'require("internal/options").getOptionValue("--test-isolation")',
    ]);
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, 'none\n');
    assert.strictEqual(result.code, 0);
  });

  it('should throw an error when a namespace-scoped option is not recognised', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      `--experimental-config-file=${fixtures.path('rc/unknown-flag-namespace.json')}`,
      '-p', '"Hello, World!"',
    ]);
    assert.match(result.stderr, /Unknown or not allowed option unknown-flag for namespace test/);
    assert.strictEqual(result.stdout, '');
    assert.strictEqual(result.code, 9);
  });

  it('should throw an error when a namespace is not recognised', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      `--experimental-config-file=${fixtures.path('rc/unknown-namespace.json')}`,
      '-p', '"Hello, World!"',
    ]);
    assert.match(result.stderr, /Unknown namespace an-invalid-namespace/);
    assert.match(result.stderr, /unknown-namespace\.json: invalid content/);
    assert.strictEqual(result.stdout, '');
    assert.strictEqual(result.code, 9);
  });

  it('should allow the $schema field', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      `--experimental-config-file=${fixtures.path('rc/schema.json')}`,
      '-p', 'http.maxHeaderSize',
    ]);
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '10\n');
    assert.strictEqual(result.code, 0);
  });

  it('should handle an empty namespace valid namespace', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      `--experimental-config-file=${fixtures.path('rc/empty-valid-namespace.json')}`,
      '-p', '"Hello, World!"',
    ]);
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, 'Hello, World!\n');
    assert.strictEqual(result.code, 0);
  });

  it('should throw an error if a namespace-scoped option has already been set in node options', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      `--experimental-config-file=${fixtures.path('rc/override-node-option-with-namespace.json')}`,
      '-p', 'require("internal/options").getOptionValue("--test-isolation")',
    ]);
    assert.match(result.stderr, /Option --test-isolation is already defined/);
    assert.strictEqual(result.stdout, '');
    assert.strictEqual(result.code, 9);
  });

  it('should throw an error if a node option has already been set in a namespace-scoped option', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      `--experimental-config-file=${fixtures.path('rc/override-namespace.json')}`,
      '-p', 'require("internal/options").getOptionValue("--test-isolation")',
    ]);
    assert.match(result.stderr, /Option --test-isolation is already defined/);
    assert.strictEqual(result.stdout, '');
    assert.strictEqual(result.code, 9);
  });

  it('should prioritise CLI namespace-scoped options over config file options', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      '--test-isolation', 'process',
      `--experimental-config-file=${fixtures.path('rc/namespaced/node.config.json')}`,
      '--no-test',
      '-p', 'require("internal/options").getOptionValue("--test-isolation")',
    ]);
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, 'process\n');
    assert.strictEqual(result.code, 0);
  });

  it('should append namespace-scoped config file options with CLI options in case of array', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      '--test-coverage-exclude', 'cli-pattern1',
      '--test-coverage-exclude', 'cli-pattern2',
      `--experimental-config-file=${fixtures.path('rc/namespace-with-array.json')}`,
      '--no-test',
      '-p', 'JSON.stringify(require("internal/options").getOptionValue("--test-coverage-exclude"))',
    ]);
    assert.strictEqual(result.stderr, '');
    const excludePatterns = JSON.parse(result.stdout);
    const expected = [
      'config-pattern1',
      'config-pattern2',
      'cli-pattern1',
      'cli-pattern2',
    ];
    assert.deepStrictEqual(excludePatterns, expected);
    assert.strictEqual(result.code, 0);
  });

  it('should allow setting kDisallowedInEnvvar in the config file if part of a namespace', async () => {
    // This test assumes that the --test-concurrency flag is configured as kDisallowedInEnvVar
    // and that it is part of at least one namespace.
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      `--experimental-config-file=${fixtures.path('rc/namespace-with-disallowed-envvar.json')}`,
      '--no-test',
      '-p', 'require("internal/options").getOptionValue("--test-concurrency")',
    ]);
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '1\n');
    assert.strictEqual(result.code, 0);
  });

  it('should override namespace-scoped config file options with CLI options', async () => {
    // This test assumes that the --test-concurrency flag is configured as kDisallowedInEnvVar
    // and that it is part of at least one namespace.
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      '--test-concurrency', '2',
      `--experimental-config-file=${fixtures.path('rc/namespace-with-disallowed-envvar.json')}`,
      '--no-test',
      '-p', 'require("internal/options").getOptionValue("--test-concurrency")',
    ]);
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, '2\n');
    assert.strictEqual(result.code, 0);
  });

  it('should throw an error for removed "testRunner" namespace', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      `--experimental-config-file=${fixtures.path('rc/deprecated-testrunner-namespace.json')}`,
      '-p', '"Hello, World!"',
    ]);
    assert.match(result.stderr, /the "testRunner" namespace has been removed\. Use "test" instead\./);
    assert.strictEqual(result.stdout, '');
    assert.strictEqual(result.code, 9);
  });

  it('should automatically enable --test flag when test namespace is present', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      `--experimental-config-file=${fixtures.path('rc/namespaced/node.config.json')}`,
      fixtures.path('rc/test.js'),
    ]);
    assert.strictEqual(result.code, 0);
    assert.match(result.stdout, /tests 1/);
  });

  it('should automatically enable --permission flag when permission namespace is present', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      `--experimental-config-file=${fixtures.path('rc/permission-namespace.json')}`,
      '-p', 'require("internal/options").getOptionValue("--permission")',
    ]);
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, 'true\n');
    assert.strictEqual(result.code, 0);
  });

  it('should respect explicit test: false in test namespace', async () => {
    const result = await spawnPromisified(process.execPath, [
      '--no-warnings',
      '--expose-internals',
      `--experimental-config-file=${fixtures.path('rc/test-namespace-explicit-false.json')}`,
      '-p', 'require("internal/options").getOptionValue("--test")',
    ]);
    assert.strictEqual(result.stderr, '');
    assert.strictEqual(result.stdout, 'false\n');
    assert.strictEqual(result.code, 0);
  });
});