JUnit testing deletion of a text file using a testing text file

I am trying to write a Junit test for a java code that with three methods.

fileDeletion.java

public static void fileDeletion(String filePath){
        File file = new File(filePath);
        file.delete();
    }

I looked online on how to test this but it cam up with how to make a temporary file in JUnit which is 'guaranteed to be deleted after the test finishes'. See: https://howtodoinjava.com/junit/junit-creating-temporary-filefolder-using-temporaryfolder-rule/ How do I make a file which can be created and then subsequently deleted in a JUnit Test?

Any help would go a long way, many thanks.