@Test
public void mkdirShoudNotBeCalledWhenDirectoryExists() {

	// Given
	File cacheDir = mock(File.class); 
	given(cacheDir.exists()).willReturn(true);
	UniversalBaseDiscCache discCache = new UniversalBaseDiscCache(cacheDir, delegate){}; 
	// When
	discCache.initialize();
	// Then
	verify(cacheDir, never()).mkdir();
}