@Test
    void testUndefinedOutputDirectory() throws Exception {
        MavenProject p = new MavenProject();
        assertNoNulls(p.getCompileClasspathElements());
        assertNoNulls(p.getSystemClasspathElements());
        assertNoNulls(p.getRuntimeClasspathElements());
        assertNoNulls(p.getTestClasspathElements());
    }

    @Test
    void testAddDotFile() {
        MavenProject project = new MavenProject();