Question

I just want to write a JUnit test case that will just test whether my below code has successfully copied the directory to new directory.

File origPath = new File("/sourceDir/");

File newPath = new File("/destDir/");

try {
    FileUtils.copyDirectory(origPath, newPath);
    } catch (Throwable e) {

    }

Please suggest, how I can write a JUnit test or mock to test the above code.

Answer 1

You need the TemporaryFolder Rule.

@Rule
public TemporaryFolder tempFolder = new TemporaryFolder();

Then you create a new folder:

File source = tempFolder.newFolder();

Then you call the copyDirectory-method:

FileUtils.copyDirectory(source.getAbsolutePath(), source.getParent() + "/dest");

And then you can check, whether the folder exists:

new File(tempFolder.getRoot(), "dest").exists()