public void setArtifactId(String artifactId) {
        this.artifactId = artifactId;
    }
@Test
    public void testSetArtifactId() {
        String artifactId = "aaa";
        String expected = "aaa";
        Model instance = new Model();
        instance.setArtifactId(artifactId);
        assertEquals(expected, instance.getArtifactId());
    }