Error with XCTestExpectation: API violation – multiple calls made to -[XCTestExpectation fulfill]
XCTestExpectation Error API violation – multiple calls made to -[XCTestExpectation fulfill] I got the same error when set expectation.expectedFulfillmentCount. Solution: expectation.assertForOverFulfill = false If expectation.assertForOverFulfill = true and fulfill() is called when it is already fulfilled then it throws an exception