Adding Test Classes
Expand the scope of your unit testing by adding test classes to a project.
Click the Add button (+) in the test navigator filter bar.
From the pop-up menu, choose New Test Class.
Choose the Test Case Class template, and click Next.
Enter a name for the class, choose the superclass and implementation language, and click Next.
Select a destination, group, and target, and click Create.
Xcode adds a new bundle and class to the test navigator, including stub implementations for the
Complete the stub implementations, and add other code as necessary.