rust-css-parser-lightningcss/test-bundle.mjs at master · gmh5225/rust-css-parser-lightningcss · GitHub

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import path from 'path';
import fs from 'fs';
import css from './node/index.js';

await (async function testResolver() {
  const inMemoryFs = new Map(Object.entries({
    'foo.css': `
 @import 'root:bar.css';

 .foo { color: red; }
         `.trim(),

    'bar.css': `
 @import 'root:hello/world.css';

 .bar { color: green; }
         `.trim(),

    'hello/world.css': `
 .baz { color: blue; }
         `.trim(),
  }));

  const { code: buffer } = await css.bundleAsync({
    filename: 'foo.css',
    resolver: {
      read(file) {
        const result = inMemoryFs.get(path.normalize(file));
        if (!result) throw new Error(`Could not find ${file} in ${Array.from(inMemoryFs.keys()).join(', ')}.`);
        return result;
      },

      resolve(specifier) {
        return specifier.slice('root:'.length);
      },
    },
  });
  const code = buffer.toString('utf-8').trim();

  const expected = `
.baz {
  color: #00f;
}

.bar {
  color: green;
}

.foo {
  color: red;
}
     `.trim();
  if (code !== expected) throw new Error(`\`testResolver()\` failed. Expected:\n${expected}\n\nGot:\n${code}`);
})();

await (async function testOnlyCustomRead() {
  const inMemoryFs = new Map(Object.entries({
    'foo.css': `
 @import 'hello/world.css';

 .foo { color: red; }
         `.trim(),

    'hello/world.css': `
 @import '../bar.css';

 .bar { color: green; }
         `.trim(),

    'bar.css': `
 .baz { color: blue; }
         `.trim(),
  }));

  const { code: buffer } = await css.bundleAsync({
    filename: 'foo.css',
    resolver: {
      read(file) {
        const result = inMemoryFs.get(path.normalize(file));
        if (!result) throw new Error(`Could not find ${file} in ${Array.from(inMemoryFs.keys()).join(', ')}.`);
        return result;
      },
    },
  });
  const code = buffer.toString('utf-8').trim();

  const expected = `
.baz {
  color: #00f;
}

.bar {
  color: green;
}

.foo {
  color: red;
}
     `.trim();
  if (code !== expected) throw new Error(`\`testOnlyCustomRead()\` failed. Expected:\n${expected}\n\nGot:\n${code}`);
})();

await (async function testOnlyCustomResolve() {
  const root = path.join('tests', 'testdata');
  const { code: buffer } = await css.bundleAsync({
    filename: path.join(root, 'foo.css'),
    resolver: {
      resolve(specifier) {
        // Strip `root:` prefix off specifier and resolve it as an absolute path
        // in the test data root.
        return path.join(root, specifier.slice('root:'.length));
      },
    },
  });
  const code = buffer.toString('utf-8').trim();

  const expected = `
.baz {
  color: #00f;
}

.bar {
  color: green;
}

.foo {
  color: red;
}
     `.trim();
  if (code !== expected) throw new Error(`\`testOnlyCustomResolve()\` failed. Expected:\n${expected}\n\nGot:\n${code}`);
})();

await (async function testAsyncRead() {
  const root = path.join('tests', 'testdata');
  const { code: buffer } = await css.bundleAsync({
    filename: path.join(root, 'foo.css'),
    resolver: {
      async read(file) {
        return await fs.promises.readFile(file, 'utf8');
      },
      resolve(specifier) {
        // Strip `root:` prefix off specifier and resolve it as an absolute path
        // in the test data root.
        return path.join(root, specifier.slice('root:'.length));
      },
    },
  });
  const code = buffer.toString('utf-8').trim();

  const expected = `
.baz {
  color: #00f;
}

.bar {
  color: green;
}

.foo {
  color: red;
}
     `.trim();
  if (code !== expected) throw new Error(`\`testAsyncRead()\` failed. Expected:\n${expected}\n\nGot:\n${code}`);
})();

(async function testReadThrow() {
  let error = undefined;
  try {
    await css.bundleAsync({
      filename: 'foo.css',
      resolver: {
        read(file) {
          throw new Error(`Oh noes! Failed to read \`${file}\`.`);
        }
      },
    });
  } catch (err) {
    error = err;
  }

  if (!error) throw new Error(`\`testReadThrow()\` failed. Expected \`bundleAsync()\` to throw, but it did not.`);
  // TODO: need support for napi-rs to propagate errors.
  // if (!error.message.includes(`\`read()\` threw error:`) || !error.message.includes(`Oh noes! Failed to read \`foo.css\`.`)) {
  //   throw new Error(`\`testReadThrow()\` failed. Expected \`bundleAsync()\` to throw a specific error message, but it threw a different error:\n${error.message}`);
  // }
})();

(async function testAsyncReadThrow() {
  let error = undefined;
  try {
    await css.bundleAsync({
      filename: 'foo.css',
      resolver: {
        async read(file) {
          throw new Error(`Oh noes! Failed to read \`${file}\`.`);
        }
      },
    });
  } catch (err) {
    error = err;
  }

  if (!error) throw new Error(`\`testReadThrow()\` failed. Expected \`bundleAsync()\` to throw, but it did not.`);
  // TODO: need support for napi-rs to propagate errors.
  // if (!error.message.includes(`\`read()\` threw error:`) || !error.message.includes(`Oh noes! Failed to read \`foo.css\`.`)) {
  //   throw new Error(`\`testReadThrow()\` failed. Expected \`bundleAsync()\` to throw a specific error message, but it threw a different error:\n${error.message}`);
  // }
})();

await (async function testResolveThrow() {
  let error = undefined;
  try {
    await css.bundleAsync({
      filename: 'tests/testdata/foo.css',
      resolver: {
        resolve(specifier, originatingFile) {
          throw new Error(`Oh noes! Failed to resolve \`${specifier}\` from \`${originatingFile}\`.`);
        }
      },
    });
  } catch (err) {
    error = err;
  }

  if (!error) throw new Error(`\`testResolveThrow()\` failed. Expected \`bundleAsync()\` to throw, but it did not.`);
  // TODO: need support for napi-rs to propagate errors.
  // if (!error.message.includes(`\`resolve()\` threw error:`) || !error.message.includes(`Oh noes! Failed to resolve \`root:hello/world.css\` from \`tests/testdata/css/foo.css\`.`)) {
  //   throw new Error(`\`testResolveThrow()\` failed. Expected \`bundleAsync()\` to throw a specific error message, but it threw a different error:\n${error.message}`);
  // }
})();

await (async function testAsyncResolveThrow() {
  let error = undefined;
  try {
    await css.bundleAsync({
      filename: 'tests/testdata/foo.css',
      resolver: {
        async resolve(specifier, originatingFile) {
          throw new Error(`Oh noes! Failed to resolve \`${specifier}\` from \`${originatingFile}\`.`);
        }
      },
    });
  } catch (err) {
    error = err;
  }

  if (!error) throw new Error(`\`testResolveThrow()\` failed. Expected \`bundleAsync()\` to throw, but it did not.`);
  // TODO: need support for napi-rs to propagate errors.
  // if (!error.message.includes(`\`resolve()\` threw error:`) || !error.message.includes(`Oh noes! Failed to resolve \`root:hello/world.css\` from \`tests/testdata/css/foo.css\`.`)) {
  //   throw new Error(`\`testResolveThrow()\` failed. Expected \`bundleAsync()\` to throw a specific error message, but it threw a different error:\n${error.message}`);
  // }
})();

await (async function testReadReturnNonString() {
  let error = undefined;
  try {
    await css.bundleAsync({
      filename: 'foo.css',
      resolver: {
        read() {
          return 1234; // Returns a non-string value.
        }
      },
    });
  } catch (err) {
    error = err;
  }

  if (!error) throw new Error(`\`testReadReturnNonString()\` failed. Expected \`bundleAsync()\` to throw, but it did not.`);
  if (!error.message.includes(`InvalidArg, expect String, got: Number`)) {
    throw new Error(`\`testReadReturnNonString()\` failed. Expected \`bundleAsync()\` to throw a specific error message, but it threw a different error:\n${error.message}`);
  }
})();

await (async function testResolveReturnNonString() {
  let error = undefined;
  try {
    await css.bundleAsync({
      filename: 'tests/testdata/foo.css',
      resolver: {
        resolve() {
          return 1234; // Returns a non-string value.
        }
      },
    });
  } catch (err) {
    error = err;
  }

  if (!error) throw new Error(`\`testResolveReturnNonString()\` failed. Expected \`bundleAsync()\` to throw, but it did not.`);
  if (!error.message.includes(`InvalidArg, expect String, got: Number`)) {
    throw new Error(`\`testResolveReturnNonString()\` failed. Expected \`bundleAsync()\` to throw a specific error message, but it threw a different error:\n${error.message}`);
  }
})();

console.log('PASSED!');