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test-esm-resolve-type.js
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test-esm-resolve-type.js
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'use strict';
// Flags: --expose-internals
/**
* This test ensures defaultResolve returns the found module format in the
* return object in the form:
* { url: <url_value>, format: <'module'|'commonjs'|undefined> };
*/
const common = require('../common');
const tmpdir = require('../common/tmpdir');
const fixtures = require('../common/fixtures');
const path = require('path');
const fs = require('fs');
const url = require('url');
if (!common.isMainThread) {
common.skip(
'test-esm-resolve-type.js: process.chdir is not available in Workers'
);
}
const assert = require('assert');
const {
defaultResolve: resolve
} = require('internal/modules/esm/resolve');
const rel = (file) => path.join(tmpdir.path, file);
const previousCwd = process.cwd();
const nmDir = rel('node_modules');
try {
tmpdir.refresh();
process.chdir(tmpdir.path);
/**
* ensure that resolving by full path does not return the format
* with the defaultResolver
*/
[
[ '/es-modules/package-type-module/index.js', 'module' ],
[ '/es-modules/package-type-commonjs/index.js', 'commonjs' ],
// "commonjs" is the default type, so it is assumed when there is no "type"
// or specific file extension (`.cjs` or `.mjs`)
// It happens to be "correct" here:
[ '/es-modules/packages-with-bin/no-type-but-commonjs/bin/foo', 'commonjs'],
// It happens to be "wrong" here:
[ '/es-modules/packages-with-bin/no-type-but-module/bin/foo', 'commonjs' ],
[ '/es-modules/packages-with-bin/type-commonjs/bin/foo', 'commonjs' ],
[ '/es-modules/packages-with-bin/type-module/bin/foo', 'module' ],
[ '/es-modules/package-without-type/index.js', 'commonjs' ],
[ '/es-modules/package-without-pjson/index.js', 'commonjs' ],
].forEach(([ testScript, expectedType ]) => {
const resolvedPath = path.resolve(fixtures.path(testScript));
const resolveResult = resolve(url.pathToFileURL(resolvedPath));
assert.strictEqual(
resolveResult.format,
expectedType,
new assert.AssertionError({
actual: resolveResult?.format,
expected: expectedType,
message: `Expectation failed for "${testScript}"`
})
);
});
/**
* create a test module and try to resolve it by module name.
* check the result is as expected
*
* for test-module-ne: everything .js that is not 'module' is 'commonjs'
*/
[ [ 'test-module-mainjs', 'js', 'module', 'module'],
[ 'test-module-mainmjs', 'mjs', 'module', 'module'],
[ 'test-module-cjs', 'js', 'commonjs', 'commonjs'],
[ 'test-module-ne', 'js', undefined, 'commonjs'],
].forEach((testVariant) => {
const [ moduleName,
moduleExtenstion,
moduleType,
expectedResolvedType ] = testVariant;
process.chdir(previousCwd);
tmpdir.refresh();
process.chdir(tmpdir.path);
const createDir = (path) => {
if (!fs.existsSync(path)) {
fs.mkdirSync(path);
}
};
const mDir = rel(`node_modules/${moduleName}`);
const subDir = rel(`node_modules/${moduleName}/subdir`);
const pkg = rel(`node_modules/${moduleName}/package.json`);
const script = rel(`node_modules/${moduleName}/subdir/mainfile.${moduleExtenstion}`);
createDir(nmDir);
createDir(mDir);
createDir(subDir);
const pkgJsonContent = {
...(moduleType !== undefined) && { type: moduleType },
main: `subdir/mainfile.${moduleExtenstion}`
};
fs.writeFileSync(pkg, JSON.stringify(pkgJsonContent));
fs.writeFileSync(script,
'export function esm-resolve-tester() {return 42}');
const resolveResult = resolve(`${moduleName}`);
assert.strictEqual(resolveResult.format, expectedResolvedType);
fs.rmSync(nmDir, { recursive: true, force: true });
});
// Helpers
const createDir = (path) => {
if (!fs.existsSync(path)) {
fs.mkdirSync(path);
}
};
function testDualPackageWithJsMainScriptAndModuleType() {
// Create a dummy dual package
//
/**
* this creates the following directory structure:
*
* ./node_modules:
* |-> my-dual-package
* |-> es
* |-> index.js
* |-> package.json [2]
* |-> lib
* |-> index.js
* |->package.json [1]
*
* in case the package is imported:
* import * as my-package from 'my-dual-package'
* it will cause the resolve method to return:
* {
* url: '<base_path>/node_modules/my-dual-package/es/index.js',
* format: 'module'
* }
*
* following testcase ensures that resolve works correctly in this case
* returning the information as specified above. Source for 'url' value
* is [1], source for 'format' value is [2]
*/
const moduleName = 'my-dual-package';
const mDir = rel(`node_modules/${moduleName}`);
const esSubDir = rel(`node_modules/${moduleName}/es`);
const cjsSubDir = rel(`node_modules/${moduleName}/lib`);
const pkg = rel(`node_modules/${moduleName}/package.json`);
const esmPkg = rel(`node_modules/${moduleName}/es/package.json`);
const esScript = rel(`node_modules/${moduleName}/es/index.js`);
const cjsScript = rel(`node_modules/${moduleName}/lib/index.js`);
createDir(nmDir);
createDir(mDir);
createDir(esSubDir);
createDir(cjsSubDir);
const mainPkgJsonContent = {
type: 'commonjs',
exports: {
'.': {
'require': './lib/index.js',
'import': './es/index.js',
'default': './lib/index.js'
},
'./package.json': './package.json',
}
};
const esmPkgJsonContent = {
type: 'module'
};
fs.writeFileSync(pkg, JSON.stringify(mainPkgJsonContent));
fs.writeFileSync(esmPkg, JSON.stringify(esmPkgJsonContent));
fs.writeFileSync(
esScript,
'export function esm-resolve-tester() {return 42}'
);
fs.writeFileSync(
cjsScript,
'module.exports = {esm-resolve-tester: () => {return 42}}'
);
// test the resolve
const resolveResult = resolve(`${moduleName}`);
assert.strictEqual(resolveResult.format, 'module');
assert.ok(resolveResult.url.includes('my-dual-package/es/index.js'));
}
testDualPackageWithJsMainScriptAndModuleType();
// TestParameters are ModuleName, mainRequireScript, mainImportScript,
// mainPackageType, subdirPkgJsonType, expectedResolvedFormat, mainSuffix
[
[ 'mjs-mod-mod', 'index.js', 'index.mjs', 'module', 'module', 'module'],
[ 'mjs-com-com', 'idx.js', 'idx.mjs', 'commonjs', 'commonjs', 'module'],
[ 'mjs-mod-com', 'index.js', 'imp.mjs', 'module', 'commonjs', 'module'],
[ 'cjs-mod-mod', 'index.cjs', 'imp.cjs', 'module', 'module', 'commonjs'],
[ 'js-com-com', 'index.js', 'imp.js', 'commonjs', 'commonjs', 'commonjs'],
[ 'js-com-mod', 'index.js', 'imp.js', 'commonjs', 'module', 'module'],
[ 'qmod', 'index.js', 'imp.js', 'commonjs', 'module', 'module', '?k=v'],
[ 'hmod', 'index.js', 'imp.js', 'commonjs', 'module', 'module', '#Key'],
[ 'qhmod', 'index.js', 'imp.js', 'commonjs', 'module', 'module', '?k=v#h'],
[ 'ts-mod-com', 'index.js', 'imp.ts', 'module', 'commonjs', undefined],
].forEach((testVariant) => {
const [
moduleName,
mainRequireScript,
mainImportScript,
mainPackageType,
subdirPackageType,
expectedResolvedFormat,
mainSuffix = '' ] = testVariant;
const mDir = rel(`node_modules/${moduleName}`);
const subDir = rel(`node_modules/${moduleName}/subdir`);
const pkg = rel(`node_modules/${moduleName}/package.json`);
const subdirPkg = rel(`node_modules/${moduleName}/subdir/package.json`);
const esScript = rel(`node_modules/${moduleName}/subdir/${mainImportScript}`);
const cjsScript = rel(`node_modules/${moduleName}/subdir/${mainRequireScript}`);
createDir(nmDir);
createDir(mDir);
createDir(subDir);
const mainPkgJsonContent = {
type: mainPackageType,
exports: {
'.': {
'require': `./subdir/${mainRequireScript}${mainSuffix}`,
'import': `./subdir/${mainImportScript}${mainSuffix}`,
'default': `./subdir/${mainRequireScript}${mainSuffix}`
},
'./package.json': './package.json',
}
};
const subdirPkgJsonContent = {
type: `${subdirPackageType}`
};
fs.writeFileSync(pkg, JSON.stringify(mainPkgJsonContent));
fs.writeFileSync(subdirPkg, JSON.stringify(subdirPkgJsonContent));
fs.writeFileSync(
esScript,
'export function esm-resolve-tester() {return 42}'
);
fs.writeFileSync(
cjsScript,
'module.exports = {esm-resolve-tester: () => {return 42}}'
);
// test the resolve
const resolveResult = resolve(`${moduleName}`);
assert.strictEqual(resolveResult.format, expectedResolvedFormat);
assert.ok(resolveResult.url.endsWith(`${moduleName}/subdir/${mainImportScript}${mainSuffix}`));
});
} finally {
process.chdir(previousCwd);
fs.rmSync(nmDir, { recursive: true, force: true });
}