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(