ModulesTest.java 文件源码

/**
 * Basic test of stream() to ensure that elements for providers in named
 * modules come before elements for providers in unnamed modules.
 */
@Test
public void testStreamOrder() {
    List<Class<?>> types = ServiceLoader.load(ScriptEngineFactory.class)
            .stream()
            .map(Provider::type)
            .collect(Collectors.toList());

    boolean foundUnnamed = false;
    for (Class<?> factoryClass : types) {
        if (factoryClass.getModule().isNamed()) {
            if (foundUnnamed) {
                assertTrue(false, "Named module element after unnamed");
            }
        } else {
            foundUnnamed = true;
        }
    }
}