XCTestExpectation

XCTestExpectation is a tool used in software testing to handle asynchronous operations—tasks that take time to complete, like network requests. It allows test code to wait for these tasks to finish before confirming if everything worked correctly. Essentially, you set an expectation for an event to occur, and the test will pause until that event is fulfilled or a timeout expires. This ensures tests accurately verify the completion of async tasks, preventing false positives or negatives caused by timing issues.