7 examples of 'jest mock once' in JavaScript

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export function mockResolvedValueOnce(mock, value) {
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  mock.mockImplementationOnce(
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    () =>
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      new Promise(resolve => {
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        process.nextTick(() => resolve(value))
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      })
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  )
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}

76
get called() {
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  return this.callCount > 0;
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}

13
SourceGroupsManager: jest.fn().mockImplementation(function mock() {
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  this.setImportStatus = jest.fn();
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  this.findByImportId = jest.fn();
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}),

4
getSpy() {
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  return jest.fn();
6
}

4
export function mock(callbacks) {
5
  if (consoleBak) {
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    // Can only mock console once before restore it.
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    return false;
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  }
9
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  consoleBak = {};
11
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  for (const property in callbacks) {
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    if (callbacks.hasOwnProperty(property)) {
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      consoleBak[property] = console[property];
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      console[property] = callbacks[property];
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    }
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  }
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  return true;
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}

48
export function toHaveBeenCalledOnceWith({actual, callCount, equals, argsFor}, ...args) {
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  const count = callCount(actual) || 0;
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  const wasCalledOnce = count === 1;
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  const ok = wasCalledOnce && equals(argsFor(actual, 0), args);
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  const msg = wasCalledOnce && !ok ? ' with different arguments' : '';
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  return {
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    pass: ok,
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    message() {
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      return `Expect ${pp(actual)} {{not}} to have been called once but was called ${pp(count)} time(s)${msg}`;
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    },
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  };
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}

167
export function laterMock(
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  createStream: <u>(...timeline: Timeline<u>) =&gt; Stream<u>,
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) {
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  return function later(time: number, value?: T): Stream {
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    return createStream(t(time), v(value as any))
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  }
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}</u></u></u>