No issue: RTL nav bar UI tests

app/src/androidTest/java/org/mozilla/fenix/helpers/TestHelper.kt

@@ -6,6 +6,7 @@
 
 package org.mozilla.fenix.helpers
 
+import android.Manifest
 import android.app.ActivityManager
 import android.app.PendingIntent
 import android.content.ActivityNotFoundException
@@ -42,6 +43,7 @@ import androidx.test.espresso.matcher.ViewMatchers.withParent
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.rule.ActivityTestRule
+import androidx.test.runner.permission.PermissionRequester
 import androidx.test.uiautomator.By
 import androidx.test.uiautomator.UiDevice
 import androidx.test.uiautomator.UiObject
@@ -57,6 +59,7 @@ import org.hamcrest.Matcher
 import org.junit.Assert
 import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
+import org.mozilla.fenix.Config
 import org.mozilla.fenix.HomeActivity
 import org.mozilla.fenix.R
 import org.mozilla.fenix.customtabs.ExternalAppBrowserActivity
@@ -389,20 +392,31 @@ object TestHelper {
 
     /**
      * Changes the default language of the entire device, not just the app.
+     * Runs on Debug variant as we don't want to adjust Release permission manifests
      * Runs the test in its testBlock.
-     * Cleans up and sets the default locale after it's are done.
+     * Cleans up and sets the default locale after it's done.
      */
     fun runWithSystemLocaleChanged(locale: Locale, testRule: ActivityTestRule<HomeActivity>, testBlock: () -> Unit) {
-        val defaultLocale = Locale.getDefault()
+        if (Config.channel.isDebug) {
+            /* Sets permission to change device language */
+            PermissionRequester().apply {
+                addPermissions(
+                    Manifest.permission.CHANGE_CONFIGURATION,
+                )
+                requestPermissions()
+            }
 
-        try {
-            setSystemLocale(locale)
-            testBlock()
-            ThreadUtils.runOnUiThread { testRule.activity.recreate() }
-        } catch (e: Exception) {
-            e.printStackTrace()
-        } finally {
-            setSystemLocale(defaultLocale)
+            val defaultLocale = Locale.getDefault()
+
+            try {
+                setSystemLocale(locale)
+                testBlock()
+                ThreadUtils.runOnUiThread { testRule.activity.recreate() }
+            } catch (e: Exception) {
+                e.printStackTrace()
+            } finally {
+                setSystemLocale(defaultLocale)
+            }
         }
     }
 

app/src/androidTest/java/org/mozilla/fenix/ui/NavigationToolbarTest.kt

@@ -12,11 +12,14 @@ import org.junit.After
 import org.junit.Before
 import org.junit.Rule
 import org.junit.Test
+import org.mozilla.fenix.customannotations.SmokeTest
 import org.mozilla.fenix.helpers.AndroidAssetDispatcher
 import org.mozilla.fenix.helpers.HomeActivityTestRule
 import org.mozilla.fenix.helpers.TestAssetHelper
+import org.mozilla.fenix.helpers.TestHelper.runWithSystemLocaleChanged
 import org.mozilla.fenix.ui.robots.homeScreen
 import org.mozilla.fenix.ui.robots.navigationToolbar
+import java.util.Locale
 
 /**
  *  Tests for verifying basic functionality of browser navigation and page related interactions
@@ -95,6 +98,46 @@ class NavigationToolbarTest {
         }
     }
 
+    // Swipes the nav bar left/right to switch between tabs
+    @SmokeTest
+    @Test
+    fun swipeToSwitchTabTest() {
+        val firstWebPage = TestAssetHelper.getGenericAsset(mockWebServer, 1)
+        val secondWebPage = TestAssetHelper.getGenericAsset(mockWebServer, 2)
+
+        navigationToolbar {
+        }.enterURLAndEnterToBrowser(firstWebPage.url) {
+        }.openTabDrawer {
+        }.openNewTab {
+        }.submitQuery(secondWebPage.url.toString()) {
+            swipeNavBarRight(secondWebPage.url.toString())
+            verifyUrl(firstWebPage.url.toString())
+            swipeNavBarLeft(firstWebPage.url.toString())
+            verifyUrl(secondWebPage.url.toString())
+        }
+    }
+
+    // Because it requires changing system prefs, this test will run only on Debug builds
+    @Test
+    fun swipeToSwitchTabInRTLTest() {
+        val firstWebPage = TestAssetHelper.getGenericAsset(mockWebServer, 1)
+        val secondWebPage = TestAssetHelper.getGenericAsset(mockWebServer, 2)
+        val arabicLocale = Locale("ar", "AR")
+
+        runWithSystemLocaleChanged(arabicLocale, activityTestRule) {
+            navigationToolbar {
+            }.enterURLAndEnterToBrowser(firstWebPage.url) {
+            }.openTabDrawer {
+            }.openNewTab {
+            }.submitQuery(secondWebPage.url.toString()) {
+                swipeNavBarLeft(secondWebPage.url.toString())
+                verifyUrl(firstWebPage.url.toString())
+                swipeNavBarRight(firstWebPage.url.toString())
+                verifyUrl(secondWebPage.url.toString())
+            }
+        }
+    }
+
     // Test running on beta/release builds in CI:
     // caution when making changes to it, so they don't block the builds
     @Test

app/src/androidTest/java/org/mozilla/fenix/ui/SettingsBasicsTest.kt

@@ -302,6 +302,7 @@ class SettingsBasicsTest {
         }
     }
 
+    // Because it requires changing system prefs, this test will run only on Debug builds
     @Ignore("Failing due to app translation bug, see: https://github.com/mozilla-mobile/fenix/issues/26729")
     @Test
     fun frenchSystemLocaleTest() {

app/src/androidTest/java/org/mozilla/fenix/ui/SmokeTest.kt

@@ -421,24 +421,6 @@ class SmokeTest {
         }
     }
 
-    // Swipes the nav bar left/right to switch between tabs
-    @Test
-    fun swipeToSwitchTabTest() {
-        val firstWebPage = TestAssetHelper.getGenericAsset(mockWebServer, 1)
-        val secondWebPage = TestAssetHelper.getGenericAsset(mockWebServer, 2)
-
-        navigationToolbar {
-        }.enterURLAndEnterToBrowser(firstWebPage.url) {
-        }.openTabDrawer {
-        }.openNewTab {
-        }.submitQuery(secondWebPage.url.toString()) {
-            swipeNavBarRight(secondWebPage.url.toString())
-            verifyUrl(firstWebPage.url.toString())
-            swipeNavBarLeft(firstWebPage.url.toString())
-            verifyUrl(secondWebPage.url.toString())
-        }
-    }
-
     // Saves a login, then changes it and verifies the update
     @Test
     fun updateSavedLoginTest() {