fail("Expected PluginException");
        } catch (PluginException e) {
            assertTrue(e.getMessage().contains("url is blank"));
        }
    }

    public void test_install_nullUrl() {
        PluginHelper testHelper = new PluginHelper();
        Artifact artifact = new Artifact("test", "1.0.0", null);

        try {
            testHelper.install(artifact);