🗒️ Logger

The test runner provides a code path to testing calls made to the logger by overriding the logger used internally.

it("tests", async () => {
  const loggerSpy = createMockLogger()
  await testRunner.setOptions({
    customLogger: loggerSpy
  }).run(...)

  expect(loggerSpy.error).not.toHaveBeenCalledWith("🐔 the sky is falling!");
})