@Test public void testProcessSequential() throws Exception { final DummyFileSetCheck check = new DummyFileSetCheck(); check.configure(new DefaultConfiguration("filesetcheck")); check.setFileExtensions("tmp"); final File firstFile = new File("inputAbstractFileSetCheck.tmp"); final SortedSet<LocalizedMessage> firstFileMessages = check.process(firstFile, new FileText(firstFile, Collections.emptyList())); assertEquals("Invalid message", "File should not be empty.", firstFileMessages.first().getMessage()); final Field field = AbstractFileSetCheck.class.getDeclaredField("MESSAGE_COLLECTOR"); field.setAccessible(true); @SuppressWarnings("unchecked") final SortedSet<LocalizedMessage> internalMessages = ((ThreadLocal<SortedSet<LocalizedMessage>>) field.get(null)).get(); assertTrue("Internal message should be empty, but was not", internalMessages.isEmpty()); final File secondFile = new File("inputAbstractFileSetCheck.txt"); final List<String> lines = Arrays.asList("key=value", "ext=tmp"); final SortedSet<LocalizedMessage> secondFileMessages = check.process(secondFile, new FileText(secondFile, lines)); assertTrue("Message should be empty, but was not", secondFileMessages.isEmpty()); }