@Test public void hasJavaSourceFiles() { final DefaultProjectFileSystem fs = newDefaultProjectFileSystem(project); assertThat(fs.hasJavaSourceFiles(), is(true)); PropertiesConfiguration conf = new PropertiesConfiguration(); conf.setProperty(CoreProperties.PROJECT_EXCLUSIONS_PROPERTY, "**/*.java"); project.setConfiguration(conf); assertThat(fs.hasJavaSourceFiles(), is(false)); }