@Test
  public void testConfigurationWithMessageFilesCofiguredByEnvironment() {
    setProperty(MESSAGE_FILES_SYSTEM_PROPERTY, "arq1, arq2");

    assertEquals(
        TestMessageSource.class, getConfiguration().getConfiguredMessagesSource().getClass());

    assertEquals(3, getConfiguration().getConfituredMessageFiles().size());
    assertTrue(getConfiguration().getConfituredMessageFiles().contains(TEST_MESSAGE_FILE));
    assertTrue(getConfiguration().getConfituredMessageFiles().contains("arq1"));
    assertTrue(getConfiguration().getConfituredMessageFiles().contains("arq2"));

    System.clearProperty(MESSAGE_FILES_SYSTEM_PROPERTY);
  }