angular-docs-cn/packages/compiler-cli/test/test_support.ts

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/**
* @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
*/
import * as fs from 'fs';
import * as path from 'path';
import * as ts from 'typescript';
import * as ng from '../index';
import {getAngularPackagesFromRunfiles, resolveNpmTreeArtifact} from './runfile_helpers';
// TEST_TMPDIR is always set by Bazel.
const tmpdir = process.env.TEST_TMPDIR !;
export function makeTempDir(): string {
let dir: string;
while (true) {
const id = (Math.random() * 1000000).toFixed(0);
dir = path.join(tmpdir, `tmp.${id}`);
if (!fs.existsSync(dir)) break;
}
fs.mkdirSync(dir);
return dir;
}
export interface TestSupport {
basePath: string;
write(fileName: string, content: string): void;
writeFiles(...mockDirs: {[fileName: string]: string}[]): void;
createCompilerOptions(overrideOptions?: ng.CompilerOptions): ng.CompilerOptions;
shouldExist(fileName: string): void;
shouldNotExist(fileName: string): void;
}
function createTestSupportFor(basePath: string) {
// Typescript uses identity comparison on `paths` and other arrays in order to determine
// if program structure can be reused for incremental compilation, so we reuse the default
// values unless overriden, and freeze them so that they can't be accidentaly changed somewhere
// in tests.
const defaultCompilerOptions = {
basePath,
'experimentalDecorators': true,
'skipLibCheck': true,
'strict': true,
'strictPropertyInitialization': false,
'types': Object.freeze<string>([]) as string[],
'outDir': path.resolve(basePath, 'built'),
'rootDir': basePath,
'baseUrl': basePath,
'declaration': true,
'target': ts.ScriptTarget.ES5,
'newLine': ts.NewLineKind.LineFeed,
'module': ts.ModuleKind.ES2015,
'moduleResolution': ts.ModuleResolutionKind.NodeJs,
'lib': Object.freeze([
path.resolve(basePath, 'node_modules/typescript/lib/lib.es6.d.ts'),
]) as string[],
// clang-format off
'paths': Object.freeze({'@angular/*': ['./node_modules/@angular/*']}) as {[index: string]: string[]}
// clang-format on
};
return {
// We normalize the basePath into a posix path, so that multiple assertions which compare
// paths don't need to normalize the path separators each time.
basePath: normalizeSeparators(basePath),
write,
writeFiles,
createCompilerOptions,
shouldExist,
shouldNotExist
};
function ensureDirExists(absolutePathToDir: string) {
if (fs.existsSync(absolutePathToDir)) {
if (!fs.statSync(absolutePathToDir).isDirectory()) {
throw new Error(`'${absolutePathToDir}' exists and is not a directory.`);
}
} else {
const parentDir = path.dirname(absolutePathToDir);
ensureDirExists(parentDir);
fs.mkdirSync(absolutePathToDir);
}
}
function write(fileName: string, content: string) {
const absolutePathToFile = path.resolve(basePath, fileName);
ensureDirExists(path.dirname(absolutePathToFile));
fs.writeFileSync(absolutePathToFile, content);
}
function writeFiles(...mockDirs: {[fileName: string]: string}[]) {
mockDirs.forEach(
(dir) => { Object.keys(dir).forEach((fileName) => { write(fileName, dir[fileName]); }); });
}
function createCompilerOptions(overrideOptions: ng.CompilerOptions = {}): ng.CompilerOptions {
return {...defaultCompilerOptions, ...overrideOptions};
}
function shouldExist(fileName: string) {
if (!fs.existsSync(path.resolve(basePath, fileName))) {
throw new Error(`Expected ${fileName} to be emitted (basePath: ${basePath})`);
}
}
function shouldNotExist(fileName: string) {
if (fs.existsSync(path.resolve(basePath, fileName))) {
throw new Error(`Did not expect ${fileName} to be emitted (basePath: ${basePath})`);
}
}
}
export function setupBazelTo(tmpDirPath: string) {
const nodeModulesPath = path.join(tmpDirPath, 'node_modules');
const angularDirectory = path.join(nodeModulesPath, '@angular');
fs.mkdirSync(nodeModulesPath);
fs.mkdirSync(angularDirectory);
getAngularPackagesFromRunfiles().forEach(({pkgPath, name}) => {
fs.symlinkSync(pkgPath, path.join(angularDirectory, name), 'dir');
// todo: check why we always need an index.d.ts
if (!fs.existsSync(path.join(angularDirectory, name, 'index.d.ts'))) {
fs.symlinkSync(
path.join(pkgPath, `${name}.d.ts`), path.join(angularDirectory, name, 'index.d.ts'));
}
});
// Link typescript
const typeScriptSource = resolveNpmTreeArtifact('npm/node_modules/typescript');
const typescriptDest = path.join(nodeModulesPath, 'typescript');
fs.symlinkSync(typeScriptSource, typescriptDest, 'dir');
// Link "rxjs" if it has been set up as a runfile. "rxjs" is linked optionally because
// not all compiler-cli tests need "rxjs" set up.
try {
const rxjsSource = resolveNpmTreeArtifact('rxjs', 'index.js');
const rxjsDest = path.join(nodeModulesPath, 'rxjs');
fs.symlinkSync(rxjsSource, rxjsDest, 'dir');
} catch (e) {
if (e.code !== 'MODULE_NOT_FOUND') throw e;
}
}
export function setup(): TestSupport {
const tmpDirPath = makeTempDir();
setupBazelTo(tmpDirPath);
return createTestSupportFor(tmpDirPath);
}
export function expectNoDiagnostics(options: ng.CompilerOptions, diags: ng.Diagnostics) {
const errorDiags = diags.filter(d => d.category !== ts.DiagnosticCategory.Message);
if (errorDiags.length) {
throw new Error(`Expected no diagnostics: ${ng.formatDiagnostics(errorDiags)}`);
}
}
export function expectNoDiagnosticsInProgram(options: ng.CompilerOptions, p: ng.Program) {
expectNoDiagnostics(options, [
...p.getNgStructuralDiagnostics(), ...p.getTsSemanticDiagnostics(),
...p.getNgSemanticDiagnostics()
]);
}
export function normalizeSeparators(path: string): string {
return path.replace(/\\/g, '/');
}