In `FakeAsyncZoneSpec`, there are several variables and APIs to identify
different times, and the names are confusing, in this commit, they are
renamed for more clear understandings.
1. currentTickTime, the tick millis advanced.
2. getFakeBaseSystemTime(), return the fake base system time.
3. setFakeBaseSystemTime(), set the fake base system time.
4. getRealSystemTime(), get the underlying native system time.
PR Close#39127
Close#38851, support `jest` fakeTimers APIs' integration with `fakeAsync()`.
After enable this feature, calling `jest.useFakeTimers()` will make all test
run into `fakeAsync()` automatically.
```
beforeEach(() => {
jest.useFakeTimers('modern');
});
afterEach(() => {
jest.useRealTimers();
});
test('should run into fakeAsync() automatically', () => {
const fakeAsyncZoneSpec = Zone.current.get('FakeAsyncTestZoneSpec');
expect(fakeAsyncZoneSpec).toBeTruthy();
});
```
Also there are mappings between `jest` and `zone` APIs.
- `jest.runAllTicks()` will call `flushMicrotasks()`.
- `jest.runAllTimers()` will call `flush()`.
- `jest.advanceTimersByTime()` will call `tick()`
- `jest.runOnlyPendingTimers()` will call `flushOnlyPendingTimers()`
- `jest.advanceTimersToNextTimer()` will call `tickToNext()`
- `jest.clearAllTimers()` will call `removeAllTimers()`
- `jest.getTimerCount()` will call `getTimerCount()`
PR Close#39016
`zone.js` supports jest `test.each()` methods, but it
introduces a bug, which is the `done()` function will not be handled correctly.
```
it('should work with done', done => {
// done will be undefined.
});
```
The reason is the logic of monkey patching `test` method is different from `jasmine` patch
// jasmine patch
```
return testBody.length === 0
? () => testProxyZone.run(testBody, null)
: done => testProxyZone.run(testBody, null, [done]);
```
// jest patch
```
return function(...args) {
return testProxyZone.run(testBody, null, args);
};
```
the purpose of this change is to handle the following cases.
```
test.each([1, 2])('test.each', (arg1, arg2) => {
expect(arg1).toBe(1);
expect(arg2).toBe(2);
});
```
so in jest, it is a little complex, because the `testBody`'s parameter may be bigger than 1, so the
logic in `jasmine`
```
return testBody.length === 0
? () => testProxyZone.run(testBody, null)
: done => testProxyZone.run(testBody, null, [done]);
```
will not work for `test.each` in jest.
So in this PR, I created a dynamic `Function` to return the correct length of paramters (which is required by jest core), to handle
1. normal `test` with or without `done`.
2. each with parameters with or without done.
PR Close#36022
JiaLiPassion