How to test DataStore in Android?

Testing DataStore in Android involves creating mock implementations of your DataStore and writing unit tests to ensure your data is correctly saved and retrieved. You can use libraries like Mockito for mocking and JUnit for writing test cases. Below is an example of how to set up your test cases for both Preferences DataStore and Proto DataStore.

// Example of testing Preferences DataStore in Android @RunWith(AndroidJUnit4::class) class PreferencesDataStoreTest { private lateinit var dataStore: DataStore @Before fun setup() { dataStore = createDataStore(name = "test_preferences") } @Test fun testSaveAndRetrieveData() = runBlocking { val key = preferencesKey("test_key") dataStore.edit { preferences -> preferences[key] = "test_value" } val preferences = dataStore.data.first() assertEquals("test_value", preferences[key]) } }

DataStore Testing Android Testing Unit Testing Preferences DataStore

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