angular-cn/packages/compiler-cli/test/ngtsc/env.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 {main, mainDiagnosticsForTest} from '../../src/main';
import {TestSupport, isInBazel, setup} from '../test_support';
function setupFakeCore(support: TestSupport): void {
if (!process.env.TEST_SRCDIR) {
throw new Error('`setupFakeCore` must be run within a Bazel test');
}
const fakeCore = path.join(
process.env.TEST_SRCDIR, 'angular/packages/compiler-cli/test/ngtsc/fake_core/npm_package');
const nodeModulesPath = path.join(support.basePath, 'node_modules');
const angularCoreDirectory = path.join(nodeModulesPath, '@angular/core');
fs.symlinkSync(fakeCore, angularCoreDirectory);
}
/**
* Manages a temporary testing directory structure and environment for testing ngtsc by feeding it
* TypeScript code.
*/
export class NgtscTestEnvironment {
private constructor(private support: TestSupport, readonly outDir: string) {}
get basePath(): string { return this.support.basePath; }
/**
* Set up a new testing environment.
*/
static setup(): NgtscTestEnvironment {
if (!NgtscTestEnvironment.supported) {
throw new Error(`Attempting to setup ngtsc tests in an unsupported environment`);
}
const support = setup();
const outDir = path.join(support.basePath, 'built');
process.chdir(support.basePath);
setupFakeCore(support);
const env = new NgtscTestEnvironment(support, outDir);
env.write('tsconfig-base.json', `{
"compilerOptions": {
"experimentalDecorators": true,
"skipLibCheck": true,
"noImplicitAny": true,
"strictNullChecks": true,
"types": [],
"outDir": "built",
"rootDir": ".",
"baseUrl": ".",
"declaration": true,
"target": "es5",
"module": "es2015",
"moduleResolution": "node",
"lib": ["es6", "dom"],
"typeRoots": ["node_modules/@types"]
},
"angularCompilerOptions": {
"enableIvy": "ngtsc"
}
}`);
return env;
}
assertExists(fileName: string) {
if (!fs.existsSync(path.resolve(this.outDir, fileName))) {
throw new Error(`Expected ${fileName} to be emitted (outDir: ${this.outDir})`);
}
}
assertDoesNotExist(fileName: string) {
if (fs.existsSync(path.resolve(this.outDir, fileName))) {
throw new Error(`Did not expect ${fileName} to be emitted (outDir: ${this.outDir})`);
}
}
getContents(fileName: string): string {
this.assertExists(fileName);
const modulePath = path.resolve(this.outDir, fileName);
return fs.readFileSync(modulePath, 'utf8');
}
write(fileName: string, content: string) { this.support.write(fileName, content); }
tsconfig(extraOpts: {[key: string]: string | boolean} = {}): void {
const opts = JSON.stringify({...extraOpts, 'enableIvy': 'ngtsc'});
const tsconfig: string =
`{"extends": "./tsconfig-base.json", "angularCompilerOptions": ${opts}}`;
this.write('tsconfig.json', tsconfig);
}
/**
* Run the compiler to completion, and assert that no errors occurred.
*/
driveMain(): void {
const errorSpy = jasmine.createSpy('consoleError').and.callFake(console.error);
const exitCode = main(['-p', this.basePath], errorSpy);
expect(errorSpy).not.toHaveBeenCalled();
expect(exitCode).toBe(0);
}
/**
* Run the compiler to completion, and return any `ts.Diagnostic` errors that may have occurred.
*/
driveDiagnostics(): ReadonlyArray<ts.Diagnostic> {
// Cast is safe as ngtsc mode only produces ts.Diagnostics.
return mainDiagnosticsForTest(['-p', this.basePath]) as ReadonlyArray<ts.Diagnostic>;
}
static get supported(): boolean { return isInBazel(); }
}