@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
45 lines (44 loc) • 2.02 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.SingleTestTransformLoader = void 0;
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
const core_1 = require("@angular-devkit/core");
const loader_utils_1 = require("loader-utils");
const path_1 = require("path");
exports.SingleTestTransformLoader = require.resolve(path_1.join(__dirname, 'single-test-transform'));
/**
* This loader transforms the default test file to only run tests
* for some specs instead of all specs.
* It works by replacing the known content of the auto-generated test file:
* const context = require.context('./', true, /\.spec\.ts$/);
* context.keys().map(context);
* with:
* const context = { keys: () => ({ map: (_a) => { } }) };
* context.keys().map(context);
* So that it does nothing.
* Then it adds import statements for each file in the files options
* array to import them directly, and thus run the tests there.
*/
function loader(source) {
const { files = [], logger = console } = loader_utils_1.getOptions(this);
// signal the user that expected content is not present.
if (!source.includes('require.context(')) {
logger.error(core_1.tags.stripIndent `The 'include' option requires that the 'main' file for tests includes the below line:
const context = require.context('./', true, /\.spec\.ts$/);
Arguments passed to require.context are not strict and can be changed.`);
return source;
}
const targettedImports = files
.map(path => `require('./${path.replace('.' + path_1.extname(path), '')}');`)
.join('\n');
const mockedRequireContext = 'Object.assign(() => { }, { keys: () => [], resolve: () => undefined });\n';
source = source.replace(/require\.context\(.*/, mockedRequireContext + targettedImports);
return source;
}
exports.default = loader;