Update OfflineFirstTopicsRepositoryTest.kt #1798
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Improve the unit test to do meaning comparisons instead of just comparing two empty lists.
dturner
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...om/google/samples/apps/nowinandroid/core/data/repository/OfflineFirstTopicsRepositoryTest.kt
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Improve the unit test to perform meaningful comparisons instead of simply comparing two empty lists.
In the unit test function
offlineFirstTopicsRepository_topics_stream_is_backed_by_topics_dao()Both
topicDao.getTopicEntities().first().map(TopicEntity::asExternalModel)andsubject.getTopics().first()return an empty list. This is becausesubject.syncWith(synchronizer)is not called beforehand.This unit test doesn't seem meaningful by just comparing two empty lists.
This PR adds a
subject.syncWith(synchronizer)call before retrieving the topic entities, so that lists with actual elements can be compared, to prove that offlineFirstTopicsRepository.getTopics() is based by topicDao.getTopicEntities().