This test is to verify if preferencesDataStore will be updated on-the-fly.
After running this, !UpdatedPref 1! and !UpdatedPref 2! was printed.
(On confirming this question on SO)
Created
July 5, 2023 03:59
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| package com.github.kentvu.test | |
| import android.util.Log | |
| import androidx.datastore.preferences.core.edit | |
| import androidx.datastore.preferences.core.stringPreferencesKey | |
| import androidx.test.ext.junit.runners.AndroidJUnit4 | |
| import kotlinx.coroutines.launch | |
| import kotlinx.coroutines.runBlocking | |
| import kotlinx.coroutines.withTimeout | |
| import org.junit.Test | |
| import org.junit.runner.RunWith | |
| val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "settings") | |
| @RunWith(AndroidJUnit4::class) | |
| class PreferencesDataStoreTest { | |
| @Test | |
| fun isDataStoreUpdatedOnTheFly(): Unit = runBlocking { | |
| val appContext = InstrumentationRegistry.getInstrumentation().targetContext | |
| val key = stringPreferencesKey("test") | |
| launch { | |
| withTimeout(10.seconds) { | |
| appContext.dataStore.data.collect { prefs -> | |
| Log.i("DefaultSettingsTest", "Prefs updated: " + prefs[key]) | |
| } | |
| } | |
| } | |
| appContext.dataStore.edit { prefs -> prefs[key] = "!UpdatedPref 1!" } | |
| appContext.dataStore.edit { prefs -> prefs[key] = "!UpdatedPref 2!" } | |
| } | |
| } |
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