Name: in this text box, specify the name of the test class to generate.
PhpStorm automatically composes the name from the production class name as follows: <production class>Test.php.
Namespace: in this text box, specify the namespace the test class will belong to. PhpStorm completes the namespace automatically
based on the value of the Directory text box. When the Directory text box is changed, the value of the Namespace text box
is changed accordingly. To use completion, press Control+Space and choose the relevant namespace from the pop-up list.
Directory: in this text box, specify the directory where the file with the test class will be stored.
By default, it is the directory where the production class is stored.
To specify another folder, click the Browse button and choose the relevant folder in the dialog box that opens.
To use completion, press Control+Space and choose the relevant folder from the pop-up list.
File Name: in this text box, specify the name of the file that will be created for the test class definition. By default, the name is
the same as the test class name.
However, if several production classes are defined in one single file, for each generated test class PhpStorm will create
a separate file.