fix: [#274] fixing locale on android 14 and setup test using junit & mockk

app/build.gradle

@@ -25,6 +25,11 @@ android {
         buildConfig true
         viewBinding true
     }
+    bundle {
+        language {
+            enableSplit = false
+        }
+    }
     assetPacks = [":install_time_asset_pack",":fast_follow_asset_pack_01"]
     signingConfigs {
         release {
@@ -365,6 +370,10 @@ dependencies {
 
     // Get the latest version from https://mvnrepository.com/artifact/com.appsflyer/af-android-sdk
     implementation 'com.appsflyer:af-android-sdk:6.15.1'
+
+    //test
+    testImplementation "io.mockk:mockk:1.13.13"
+    testImplementation 'junit:junit:4.13.2'
 }
 
 

app/src/main/java/com/breadwallet/entities/IntroLanguageResource.kt

@@ -7,8 +7,8 @@ class IntroLanguageResource {
     private val EUR: String = "EUR"
     private val RMB: String = "RMB"
     private val JPY: String = "JPY"
-    fun loadResources() : Array<IntroLanguage>{
-        return arrayOf<IntroLanguage> (
+    fun loadResources(): Array<IntroLanguage> {
+        return arrayOf<IntroLanguage>(
             IntroLanguage(
                 Language.ENGLISH.code,
                 Language.ENGLISH.title,
@@ -115,4 +115,8 @@ class IntroLanguageResource {
             )
         )
     }
+
+    fun findLanguageIndex(language: Language): Int {
+        return loadResources().map { intro -> intro.lang }.indexOf(language)
+    }
 }

app/src/main/java/com/breadwallet/presenter/activities/intro/IntroActivity.java

@@ -6,6 +6,7 @@
 import android.content.Intent;
 import android.graphics.Point;
 import android.os.Bundle;
+import android.os.Handler;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -14,13 +15,12 @@
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
-import com.appsflyer.AppsFlyerLib;
 import com.breadwallet.entities.IntroLanguageResource;
+import com.breadwallet.entities.Language;
 import com.breadwallet.presenter.activities.SetPinActivity;
 import com.breadwallet.presenter.entities.PartnerNames;
 import com.breadwallet.tools.adapter.CountryLanguageAdapter;
 import com.breadwallet.tools.util.LocaleHelper;
-import com.google.android.material.snackbar.Snackbar;
 //import com.breadwallet.BuildConfig;
 import com.breadwallet.R;
 import com.breadwallet.presenter.activities.BreadActivity;
@@ -78,6 +78,12 @@ protected void onCreate(Bundle savedInstanceState) {
         countryLanguageAdapter = new CountryLanguageAdapter(this, introLanguageResource.loadResources());
         listLangRecyclerView.setAdapter(countryLanguageAdapter);
 
+        Language currentLanguage = LocaleHelper.Companion.getInstance().getCurrentLocale();
+        int currentIndex = introLanguageResource.findLanguageIndex(currentLanguage);
+        countryLanguageAdapter.updateCenterPosition(currentIndex);
+        new Handler().post(() -> listLangRecyclerView.scrollToPosition(currentIndex));
+
+
         listLangRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
             @Override
             public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {

app/src/main/java/com/breadwallet/tools/util/LocaleHelper.kt

@@ -3,6 +3,8 @@ package com.breadwallet.tools.util
 import android.content.Context
 import android.content.SharedPreferences
 import android.os.Build
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.os.LocaleListCompat
 import androidx.preference.PreferenceManager
 import com.breadwallet.entities.Language
 import java.util.*
@@ -34,6 +36,8 @@ class LocaleHelper private constructor() {
         Locale.setDefault(locale)
         val config = context.resources.configuration
         config.setLocale(locale)
+        val localeList = LocaleListCompat.forLanguageTags(language.code)
+        AppCompatDelegate.setApplicationLocales(localeList)
         return context.createConfigurationContext(config)
     }
 

app/src/test/java/com/breadwallet/tools/util/LocaleHelperTest.kt

@@ -0,0 +1,53 @@
+package com.breadwallet.tools.util
+
+import android.content.Context
+import com.breadwallet.entities.Language
+import io.mockk.mockk
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class LocaleHelperTest {
+
+    @Test
+    fun `given LocaleHelper instance, then should validate default value`() {
+        val context: Context = mockk(relaxed = true)
+
+        LocaleHelper.init(context)
+
+        val currentLocale = LocaleHelper.instance.currentLocale
+
+        assertTrue(currentLocale == Language.ENGLISH)
+        assertEquals("en", currentLocale.code)
+        assertEquals("English", currentLocale.title)
+        assertEquals("Select language", currentLocale.desc)
+    }
+
+    @Test
+    fun `getLocale invoked, should return Locale object`() {
+        val localeIndonesian = LocaleHelper.getLocale(Language.INDONESIAN)
+
+        assertEquals("id", localeIndonesian.language)
+
+        val localeChineseSimplified = LocaleHelper.getLocale(Language.CHINESE_SIMPLIFIED)
+
+        assertEquals("zh", localeChineseSimplified.language)
+        assertEquals("CN", localeChineseSimplified.country)
+    }
+
+    @Test
+    fun `setLocaleIfNeeded invoked, should update current locale`() {
+        val context: Context = mockk(relaxed = true)
+        LocaleHelper.init(context)
+
+        val currentLocale = LocaleHelper.instance.currentLocale
+        assertTrue(currentLocale == Language.ENGLISH)
+
+        var changed = LocaleHelper.instance.setLocaleIfNeeded(Language.INDONESIAN)
+        assertTrue(changed)
+
+        changed = LocaleHelper.instance.setLocaleIfNeeded(Language.INDONESIAN)
+        assertFalse(changed)
+    }
+}