angular-cn/packages/compiler-cli/ngcc/test/locking/sync_locker_spec.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 {getFileSystem} from '../../../src/ngtsc/file_system';
import {runInEachFileSystem} from '../../../src/ngtsc/file_system/testing';
import {SyncLocker} from '../../src/locking/sync_locker';
import {MockLockFile} from '../helpers/mock_lock_file';
runInEachFileSystem(() => {
describe('SyncLocker', () => {
describe('lock()', () => {
it('should guard the `fn()` with calls to `write()` and `remove()`', () => {
const fs = getFileSystem();
const log: string[] = [];
const lockFile = new MockLockFile(fs, log);
const locker = new SyncLocker(lockFile);
locker.lock(() => log.push('fn()'));
expect(log).toEqual(['write()', 'fn()', 'remove()']);
});
it('should guard the `fn()` with calls to `write()` and `remove()`, even if it throws',
() => {
let error: string = '';
const fs = getFileSystem();
const log: string[] = [];
const lockFile = new MockLockFile(fs, log);
const locker = new SyncLocker(lockFile);
try {
locker.lock(() => {
log.push('fn()');
throw new Error('ERROR');
});
} catch (e) {
error = e.message;
}
expect(error).toEqual('ERROR');
expect(log).toEqual(['write()', 'fn()', 'remove()']);
});
it('should error if a lock file already exists', () => {
const fs = getFileSystem();
const log: string[] = [];
const lockFile = new MockLockFile(fs, log);
const locker = new SyncLocker(lockFile);
spyOn(lockFile, 'write').and.callFake(() => { throw {code: 'EEXIST'}; });
spyOn(lockFile, 'read').and.returnValue('188');
expect(() => locker.lock(() => {}))
.toThrowError(
`ngcc is already running at process with id 188.\n` +
`If you are running multiple builds in parallel then you should pre-process your node_modules via the command line ngcc tool before starting the builds;\n` +
`See https://v9.angular.io/guide/ivy#speeding-up-ngcc-compilation.\n` +
`(If you are sure no ngcc process is running then you should delete the lock-file at ${lockFile.path}.)`);
});
});
});
});