only mock timer functions currently mocked by Jest

jestjs · Apr 18, 2019 · f163fc2 · f163fc2
1 parent 61d7ac2
commit f163fc2
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Showing 4 changed files with 9 additions and 30 deletions.
diff --git a/docs/JestObjectAPI.md b/docs/JestObjectAPI.md
@@ -553,14 +553,6 @@ This means, if any timers have been scheduled (but have not yet executed), they
 
 Returns the number of fake timers still left to run.
 
-### `.jest.setSystemTime()`
-
-Set the current system time used by fake timers. Simulates a user changing the system clock while your program is running. It affects the current time but it does not in itself cause e.g. timers to fire; they will fire exactly as they would have done without the call to `jest.setSystemTime()`.
-
-### `.jest.getRealSystemTime()`
-
-When mocking time, `Date.now()` will also be mocked. If you for some reason need access to the real current time, you can invoke this function.
-
 ## Misc
 
 ### `jest.setTimeout(timeout)`

diff --git a/packages/jest-environment/src/index.ts b/packages/jest-environment/src/index.ts
@@ -244,7 +244,4 @@ export interface Jest {
    * every test so that local module state doesn't conflict between tests.
    */
   isolateModules(fn: () => void): Jest;
-
-  getRealSystemTime(): number;
-  setSystemTime(now?: number): void;
 }
diff --git a/packages/jest-fake-timers/src/jestFakeTimers.ts b/packages/jest-fake-timers/src/jestFakeTimers.ts
@@ -80,16 +80,20 @@ export default class FakeTimers {
   }
 
   useFakeTimers() {
-    const toFake = Object.keys(this._lolex.timers) as Array<
-      keyof LolexWithContext['timers']
-    >;
-
     if (!this._fakingTime) {
       this._clock = this._lolex.install({
         loopLimit: this._maxLoops,
         now: Date.now(),
         target: this._global,
-        toFake,
+        toFake: [
+          'setTimeout',
+          'clearTimeout',
+          'setImmediate',
+          'clearImmediate',
+          'setInterval',
+          'clearInterval',
+          'nextTick',
+        ],
       });
 
       this._fakingTime = true;
@@ -98,22 +102,10 @@ export default class FakeTimers {
 
   reset() {
     if (this._checkFakeTimers()) {
-      const {now} = this._clock;
       this._clock.reset();
-      this._clock.setSystemTime(now);
     }
   }
 
-  setSystemTime(now?: number) {
-    if (this._checkFakeTimers()) {
-      this._clock.setSystemTime(now);
-    }
-  }
-
-  getRealSystemTime() {
-    return Date.now();
-  }
-
   getTimerCount() {
     if (this._checkFakeTimers()) {
       return this._clock.countTimers();

diff --git a/packages/jest-runtime/src/index.ts b/packages/jest-runtime/src/index.ts
@@ -1054,7 +1054,6 @@ class Runtime {
       fn,
       genMockFromModule: (moduleName: string) =>
         this._generateMock(from, moduleName),
-      getRealSystemTime: () => _getFakeTimers().getRealSystemTime(),
       getTimerCount: () => _getFakeTimers().getTimerCount(),
       isMockFunction: this._moduleMocker.isMockFunction,
       isolateModules,
@@ -1073,7 +1072,6 @@ class Runtime {
         _getFakeTimers().advanceTimersByTime(msToRun),
       setMock: (moduleName: string, mock: unknown) =>
         setMockFactory(moduleName, () => mock),
-      setSystemTime: (now?: number) => _getFakeTimers().setSystemTime(now),
       setTimeout,
       spyOn,
       unmock,