EOL - default stats (EXPOSUREAPP-14836) (#5864)

* EOL - default stats

* Lint

* Update StatisticsCacheTest.kt

Corona-Warn-App/src/main/assets/default_stats/default_stats.bin

@@ -0,0 +1,3 @@
+
+
1
+�ҟ�%https://corona-pandemieradar.de/:lang

Corona-Warn-App/src/main/assets/default_stats/default_stats.sha256

@@ -0,0 +1 @@
+9c965a43d7bb263b4cb26c3dac32ec6fb51e210215b2e903ca98bd0635586e03

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/statistics/source/DefaultStatsSource.kt

@@ -0,0 +1,16 @@
+package de.rki.coronawarnapp.statistics.source
+
+import android.content.Context
+import dagger.Reusable
+import de.rki.coronawarnapp.util.di.AppContext
+import javax.inject.Inject
+
+@Reusable
+class DefaultStatsSource @Inject constructor(
+    @AppContext private val context: Context,
+) {
+
+    fun getDefaultStats(): ByteArray {
+        return context.assets.open("default_stats/default_stats.bin").readBytes()
+    }
+}

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/statistics/source/StatisticsCache.kt

@@ -9,13 +9,14 @@ import javax.inject.Singleton
 
 @Singleton
 class StatisticsCache @Inject constructor(
-    @Statistics cacheDir: File
+    @Statistics cacheDir: File,
+    private val defaultStatsSource: DefaultStatsSource
 ) : Resettable {
 
     private val cacheFile = File(cacheDir, "cache_raw")
 
     fun load(): ByteArray? = try {
-        if (cacheFile.exists()) cacheFile.readBytes() else null
+        if (cacheFile.exists()) cacheFile.readBytes() else defaultStatsSource.getDefaultStats()
     } catch (e: Exception) {
         Timber.tag(TAG).e(e, "Failed to load raw statistics from cache.")
         null

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/statistics/source/StatisticsProvider.kt

@@ -67,7 +67,7 @@ class StatisticsProvider @Inject constructor(
     private fun fromCache(): StatisticsData? = try {
         Timber.tag(TAG).d("fromCache()")
         val rawData = localCache.load()
-        rawData?.let { it -> parser.parse(it) }?.also {
+        rawData?.let { parser.parse(it) }?.also {
             Timber.tag(TAG).d("Parsed from cache: %s", it)
             if (!it.isDataAvailable) {
                 Timber.tag(TAG).w("RawData: %s", rawData.toHexString())

Corona-Warn-App/src/test/java/de/rki/coronawarnapp/statistics/source/StatisticsCacheTest.kt

@@ -2,6 +2,8 @@ package de.rki.coronawarnapp.statistics.source
 
 import io.kotest.matchers.shouldBe
 import io.mockk.MockKAnnotations
+import io.mockk.every
+import io.mockk.impl.annotations.MockK
 import kotlinx.coroutines.test.runTest
 import org.junit.jupiter.api.AfterEach
 import org.junit.jupiter.api.BeforeEach
@@ -18,10 +20,12 @@ class StatisticsCacheTest : BaseIOTest() {
     private val cacheFile = File(statisticsCacheDir, "cache_raw")
 
     private val testData = "Row, Row, Row Your Boat".encodeToByteArray()
+    @MockK lateinit var defaultStatsSource: DefaultStatsSource
 
     @BeforeEach
     fun setup() {
         MockKAnnotations.init(this)
+        every { defaultStatsSource.getDefaultStats() } returns byteArrayOf()
     }
 
     @AfterEach
@@ -30,12 +34,13 @@ class StatisticsCacheTest : BaseIOTest() {
     }
 
     fun createInstance() = StatisticsCache(
-        cacheDir = statisticsCacheDir
+        cacheDir = statisticsCacheDir,
+        defaultStatsSource = defaultStatsSource
     )
 
     @Test
     fun `empty start`() {
-        createInstance().load() shouldBe null
+        createInstance().load() shouldBe byteArrayOf()
         cacheFile.exists() shouldBe false
     }