e719419d3f
This commit adds bazel rules to test whether linking the golden partial files for test cases produces the same output as a full compile of the test case would. PR Close #39617
80 lines
2.9 KiB
TypeScript
80 lines
2.9 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {PluginObj, transformSync} from '@babel/core';
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import {createEs2015LinkerPlugin} from '../../../linker/babel';
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import {AbsoluteFsPath, FileSystem} from '../../../src/ngtsc/file_system';
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import {getBuildOutputDirectory} from '../test_helpers/compile_test';
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import {ComplianceTest} from '../test_helpers/get_compliance_tests';
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import {parseGoldenPartial} from '../test_helpers/golden_partials';
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import {runTests} from '../test_helpers/test_runner';
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runTests('partial compile + link', linkPartials);
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/**
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* Link all the partials specified in the given `test`.
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*
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* @param fs The mock file-system to use for linking the partials.
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* @param test The compliance test whose partials will be linked.
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*/
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function linkPartials(fs: FileSystem, test: ComplianceTest): void {
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const builtDirectory = getBuildOutputDirectory(fs);
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const linkerPlugin = createEs2015LinkerPlugin(test.angularCompilerOptions);
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const goldenPartialPath = fs.resolve('/GOLDEN_PARTIAL.js');
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if (!fs.exists(goldenPartialPath)) {
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throw new Error(
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'Golden partial does not exist for this test\n' +
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'Try generating it by running:\n' +
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`bazel run //packages/compiler-cli/test/compliance/test_cases:${
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test.relativePath}.golden.update`);
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}
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const partialFile = fs.readFile(goldenPartialPath);
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const partials = parseGoldenPartial(partialFile).filter(f => f.path.endsWith('.js'));
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for (const partial of partials) {
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const linkedSource =
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applyLinker({fileName: partial.path, source: partial.content}, linkerPlugin);
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safeWrite(fs, fs.resolve(builtDirectory, partial.path), linkedSource);
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}
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}
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/**
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* Run the file through the Babel linker plugin.
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*
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* It will ignore files that do not have a `.js` extension.
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*
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* @param file The file name and its source to be transformed using the linker.
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* @param linkerPlugin The linker plugin to apply.
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* @returns The file's source content, which has been transformed using the linker if necessary.
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*/
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function applyLinker(file: {fileName: string; source: string}, linkerPlugin: PluginObj): string {
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if (!file.fileName.endsWith('.js')) {
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return file.source;
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}
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const result = transformSync(file.source, {
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filename: file.fileName,
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plugins: [linkerPlugin],
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parserOpts: {sourceType: 'unambiguous'},
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});
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if (result === null) {
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throw fail('Babel transform did not have output');
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}
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if (result.code == null) {
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throw fail('Babel transform result does not have any code');
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}
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return result.code;
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}
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/**
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* Write the `content` to the `path` on the `fs` file-system, first ensuring that the containing
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* directory exists.
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*/
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function safeWrite(fs: FileSystem, path: AbsoluteFsPath, content: string): void {
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fs.ensureDir(fs.dirname(path));
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fs.writeFile(path, content);
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}
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