[FIXED] JUnit 5 test case for code that write files to file system. (Files.write)

Issue

I am fairly new with Junit and I need to write JUnit 5 test case for a method which has code statement:

public void method() {
    // some code
    Files.write(filepath)
    // some more code
}

• Will this code create new files every time when unit test is run ?
• Is there a way to write a unit test for this scenario where files are not being created, or get deleted automatically once the test method execution is complete ?

Solution needs to be JUnit 5 compatible.

Solution

I have used JUnit 5's Temporary Directory(@TempDir) functionality to create a temporary directory and then pass the directory path to Files.write() method (along with the file name of course). The @TempDir will delete the files and temporary folder, it created, once the test execution is done. This way, I was able to execute the test case.

Answered By - Navpreet Singh