Function createToHaveBeenLastCalledWithMatcher

packages/expect/src/spyMatchers.ts:760–856

()

  };

const createToHaveBeenLastCalledWithMatcher = (): MatcherFunction<
  Array<unknown>
> =>
  function (received: any, ...expected): SyncExpectationResult {
    const expectedArgument = '...expected';
    const options: MatcherHintOptions = {
      isNot: this.isNot,
      promise: this.promise,
    };
    ensureMockOrSpy(
      received,
      'toHaveBeenLastCalledWith',
      expectedArgument,
      options,
    );

    const receivedIsSpy = isSpy(received);
    const receivedName = receivedIsSpy ? 'spy' : received.getMockName();

    const calls = receivedIsSpy
      ? received.calls.all().map((x: any) => x.args)
      : received.mock.calls;
    const iLast = calls.length - 1;

    const pass = iLast >= 0 && isEqualCall(expected, calls[iLast]);

    const message = pass
      ? () => {
          const indexedCalls: Array<IndexedCall> = [];
          if (iLast > 0) {
            // Display preceding call as context.
            indexedCalls.push([iLast - 1, calls[iLast - 1]]);
          }
          indexedCalls.push([iLast, calls[iLast]]);

          return (
            // eslint-disable-next-line prefer-template
            matcherHint(
              'toHaveBeenLastCalledWith',
              receivedName,
              expectedArgument,
              options,
            ) +
            '\n\n' +
            `Expected: not ${printExpectedArgs(expected)}\n` +
            (calls.length === 1 && stringify(calls[0]) === stringify(expected)
              ? ''
              : printReceivedCallsNegative(
                  expected,
                  indexedCalls,
                  calls.length === 1,
                  iLast,
                )) +
            `\nNumber of calls: ${printReceived(calls.length)}`
          );
        }
      : () => {
          const indexedCalls: Array<IndexedCall> = [];