A test method exercises code in your project and, if that code does not produce the expected result, reports failures using a set of assertion APIs. A test method is an instance method of a test class that begins with the prefix test, takes no parameters, and returns void, for example, (void)testColorIsRed(). You add tests to a test class by writing test methods. This sequence repeats until all the test methods in all test classes have been run. After the last test method teardown in the class has been run, Xcode executes the class teardown method and moves on to the next class. This sequence repeats for all the test methods in the class. After that it runs the test method, and after that the instance teardown method. For each test method, a new instance of the class is allocated and its instance setup method executed. You can also run just one test or a subset of tests in a group using the Run buttons in either the test navigator or the source editor gutter.įor each class, testing starts by running the class setup method.
You can disable tests using the test navigator or by editing the scheme. Note: There are options available to change specifically what tests XCTest runs. Some types of tests might share certain types of setup and teardown requirements, making it sensible to gather those tests together into classes, where a single set of setup and teardown methods can minimize how much code you have to write for each test method. For example, for the calculator example project you might create BasicFunctionsTests, AdvancedFunctionsTests, and DisplayTests classes, all part of the Mac_Calc_Tests test bundle. You can use test classes to segregate tests into related groups, either for functional or organizational purposes. Test bundles can contain multiple test classes. Here’s a test navigator view for a project that has two test targets, showing the nested hierarchy of test bundles, test classes, and test methods. The test navigator lays out the source code components of all test bundles in the project, displaying the test classes and test methods in a hierarchical list. Using it is central to creating and working with tests.Īdding a test target to a project creates a test bundle. Test Targets, Test Bundles, and the Test Navigatorīefore looking at creating test classes, it is worth taking another look at the test navigator. This chapter explains how you create test classes and write test methods. In the test target are the test classes containing test methods. When you add a test target to a project with the test navigator, Xcode displays the test classes and methods from that target in the test navigator. Next Previous Writing Test Classes and Methods
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