MavenProject project = session.getCurrentProject();

        project.setArtifacts(resolver.resolve(project, Collections.singleton(Artifact.SCOPE_COMPILE), session));

        List<String> elements = project.getCompileClasspathElements();
        assertEquals(2, elements.size());

        @SuppressWarnings("deprecation")
        List<Artifact> artifacts = project.getCompileArtifacts();
        assertEquals(1, artifacts.size());

    }

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

    @Test