If you need a try in test code, mark the test case as a throwing function with throws. Then if the call ever throws an exception, XCTest will report it as a test failure.
With the system under test now in the test fixture, we’ll have an easier time adding more tests for the alert buttons. Let’s add a test to execute the action for the OK button.
The AlertVerifier method executeAction(forButton:) throws an exception if it can’t find a button with the given name. So we have to precede it with a try statement. For this to work in a test, mark the test method as throws:
| | func test_executeAlertAction_withOKButton() throws { |
| | tap(sut.button) |
| | |
| | try alertVerifier.executeAction(forButton: "OK") |
| | |
| | // Normally, assert something |
| | } |
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If you need a try in test code, mark the test case as a throwing function with throws. Then if the call ever throws an exception, XCTest will report it as a test failure. |
For our experiment, this test has no assertions. Run tests and find the console output (See Examine Console Output), where you will see the following.
| | Test Case '-[AlertTests.ViewControllerTests |
| | test_executeAlertAction_withOKButton]' started. |
| | >> OK |
| | Test Case '-[AlertTests.ViewControllerTests |
| | test_executeAlertAction_withOKButton]' passed (0.015 seconds). |
Write another test to execute the action for the Cancel button.