How to input chars from the Java JUnit run console in IDEA?

Question

The user wants to input something from the console when running a JUnit test in IntelliJ IDEA. But seems that IDEA doesn't support this feature.

@Test
public void testScanner() throws Exception{
       Scanner scanner = new Scanner(System.in);
       String line = scanner.nextLine();
       System.out.println(line);
       scanner.close();
}

Answer

By default, input in the JUnit test console is disabled in IDEA.  Click Help | Find Action from the main menu, type Registry..., select it, and in the opened list, find and enable the editable.java.test.console options there, without a restart, the IDEA's console will accept keyboard input now.

Note: this feature isn't supported in other languages such as Kotlin.