} catch (InvalidUserDataException e) {
            assertThat(e.getMessage(), equalTo("Cannot expand ZIP '" + archiveFile + "' as it does not exist."));
        }
    }

    @Test
    public void failsWhenArchiveFileIsADirectory() {
        getArchiveFile().createDir();

        try {
            getTree().visit(new EmptyFileVisitor());
            fail();
        } catch (InvalidUserDataException e) {

            assertThat(e.getMessage(), containsString("Cannot expand TAR '" + archiveFile + "' as it does not exist."));
        }
    }

    @Test
    public void failsWhenArchiveFileIsADirectory() {
        archiveFile.createDir();

        try {
            tree.visit(new EmptyFileVisitor());
            fail();
        } catch (InvalidUserDataException e) {