Function captureAssertion

scripts/jest/matchers/reactTestMatchers.js:7–21

(fn)

// TODO: Move to ReactInternalTestUtils

function captureAssertion(fn) {
  // Trick to use a Jest matcher inside another Jest matcher. `fn` contains an
  // assertion; if it throws, we capture the error and return it, so the stack
  // trace presented to the user points to the original assertion in the
  // test file.
  try {
    fn();
  } catch (error) {
    return {
      pass: false,
      message: () => error.message,
    };
  }
  return {pass: true};
}

function assertYieldsWereCleared(Scheduler, caller) {
  const actualYields = Scheduler.unstable_clearLog();