@Test
public void testGetFromCacheHappyCase() {

    given(mockJsonSerializer.deserialize(anyString())).willReturn(mockUserEntity);
    userCache.get(FAKE_USER_ID, mockUserCacheCallback);
    verify(mockFileManager).readFileContent(any(File.class));
    verify(mockJsonSerializer).deserialize(anyString());
    verify(mockUserCacheCallback).onUserEntityLoaded(mockUserEntity);
}