@Test public void testW() {

	// Arrange:
	final Logger mockLogger = mock(Logger.class);
	FragmentsLogging.setLogger(mockLogger);
	// Act:
	FragmentsLogging.w(LOG_TAG, "message.warn");
	FragmentsLogging.w(LOG_TAG, "message.warn", null);
	FragmentsLogging.w(LOG_TAG, (Throwable) null);
	// Assert:
	verify(mockLogger).w(LOG_TAG, "message.warn");
	verify(mockLogger).w(LOG_TAG, "message.warn", null);
	verify(mockLogger).w(LOG_TAG, (Throwable) null);
	verifyNoMoreInteractions(mockLogger);
}