exec.getPlugin().getArtifact().key(),
                depResults.iterator().next().key(),
                "dependency artifact is wrong.");
    }

    @Test
    public void testPluginArtifactMapExpressionReference() throws Exception {
        Session session = newSession();

        MojoExecution exec = newMojoExecution(session);

        @SuppressWarnings("unchecked")

        assertNotNull(depResults);
        assertEquals(1, depResults.size());
        assertSame(depArtifact, depResults.get(0), "dependency artifact is wrong.");
    }

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

        Artifact depArtifact = createArtifact("group", "artifact", "1");

        List<Artifact> deps = new ArrayList<>();