private Path rootDirectory;

    @Test
    void testPluginDescriptorExpressionReference() throws Exception {
        MojoExecution exec = newMojoExecution();

        MavenSession session = newMavenSession();

        Object result = new PluginParameterExpressionEvaluator(session, exec).evaluate("${plugin}");

        System.out.println("Result: " + result);

        assertSame(

    }

    private DefaultSession newSession() throws Exception {
        DefaultSession session = new DefaultSession(
                newMavenSession(), mock(RepositorySystem.class), null, null, new DefaultLookup(container), null);
        return session;
    }

    private MavenSession newMavenSession() throws Exception {
        return createMavenSession(null);
    }

    @Test
    public void testUri() throws Exception {