MavenPluginFacet facet = project.getFacet(MavenPluginFacet.class);
MavenPluginBuilder plugin = MavenPluginBuilder
.create()
.setCoordinate(PLUGIN_COORDINATE);
// SUT
facet.addPlugin(plugin);
MavenFacet mavenFacet = project.getFacet(MavenFacet.class);
Model model = mavenFacet.getModel();
List<Plugin> plugins = model.getBuild().getPlugins();
Assert.assertEquals(1, plugins.size());
assertCoordinateMatch(PLUGIN_COORDINATE, plugins.get(0));