What is the method for configuring JUnit in idea?

Here is how you configure JUnit in IDEA:

1. test source folder in the Java project
2. The source file is located in the test directory in Java.
3. Create a new JUnit test class in the root directory of the source code by right-clicking on the root directory, selecting “New” -> “Java Class”, and choosing “JUnit Test” as the template to create the new JUnit test class.
4. Write test cases in the JUnit test class.
5. Press Ctrl+Shift+T on the test case (or right-click on the test case, select “Go To” -> “Test”), and the “Create Test” dialog box will appear.
6. Select the class and method you want to test in the “Create Test” dialog box, then click “OK”.
7. Write test logic in test cases.
8. Right-click on the test case and select “Run ‘testMethodName'” to execute the test case.

The above outlines the basic steps to configure JUnit in IDEA, and depending on specific project requirements, additional advanced configurations such as setting up test runners or configuring test reports can also be done.