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feat: Create new interface for lockers with only 1 kind of lock

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This commit is contained in:
Joachim Van Herwegen
2021-01-28 11:13:46 +01:00
parent 59600b07f8
commit b61d46900f
14 changed files with 264 additions and 119 deletions
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62
test/unit/util/locking/EqualReadWriteLocker.test.ts Normal file
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import { EqualReadWriteLocker } from '../../../../src/util/locking/EqualReadWriteLocker';
import type { ResourceLocker } from '../../../../src/util/locking/ResourceLocker';
describe('An EqualReadWriteLocker', (): void => {
let sourceLocker: ResourceLocker;
let locker: EqualReadWriteLocker;
let emptyFn: () => void;
const identifier = { path: 'http://test.com/res' };
beforeEach(async(): Promise<void> => {
emptyFn = jest.fn();
sourceLocker = {
acquire: jest.fn(),
release: jest.fn(),
};
locker = new EqualReadWriteLocker(sourceLocker);
});
it('locks and unlocks a resource for a read lock.', async(): Promise<void> => {
const prom = locker.withReadLock(identifier, emptyFn);
expect(sourceLocker.acquire).toHaveBeenCalledTimes(1);
expect(sourceLocker.acquire).toHaveBeenLastCalledWith(identifier);
expect(emptyFn).toHaveBeenCalledTimes(0);
expect(sourceLocker.release).toHaveBeenCalledTimes(0);
await expect(prom).resolves.toBeUndefined();
expect(sourceLocker.acquire).toHaveBeenCalledTimes(1);
expect(emptyFn).toHaveBeenCalledTimes(1);
expect(sourceLocker.release).toHaveBeenCalledTimes(1);
expect(sourceLocker.release).toHaveBeenLastCalledWith(identifier);
});
it('locks and unlocks a resource for a write lock.', async(): Promise<void> => {
const prom = locker.withWriteLock(identifier, emptyFn);
expect(sourceLocker.acquire).toHaveBeenCalledTimes(1);
expect(sourceLocker.acquire).toHaveBeenLastCalledWith(identifier);
expect(emptyFn).toHaveBeenCalledTimes(0);
expect(sourceLocker.release).toHaveBeenCalledTimes(0);
await expect(prom).resolves.toBeUndefined();
expect(sourceLocker.acquire).toHaveBeenCalledTimes(1);
expect(emptyFn).toHaveBeenCalledTimes(1);
expect(sourceLocker.release).toHaveBeenCalledTimes(1);
expect(sourceLocker.release).toHaveBeenLastCalledWith(identifier);
});
it('unlocks correctly if the whileLocked function errors.', async(): Promise<void> => {
emptyFn = jest.fn().mockRejectedValue(new Error('bad data!'));
const prom = locker.withWriteLock(identifier, emptyFn);
expect(sourceLocker.acquire).toHaveBeenCalledTimes(1);
expect(sourceLocker.acquire).toHaveBeenLastCalledWith(identifier);
expect(emptyFn).toHaveBeenCalledTimes(0);
expect(sourceLocker.release).toHaveBeenCalledTimes(0);
await expect(prom).rejects.toThrow('bad data!');
expect(sourceLocker.acquire).toHaveBeenCalledTimes(1);
expect(emptyFn).toHaveBeenCalledTimes(1);
expect(sourceLocker.release).toHaveBeenCalledTimes(1);
expect(sourceLocker.release).toHaveBeenLastCalledWith(identifier);
});
});