[fenix] For https://github.com/mozilla-mobile/fenix/issues/26286 new selectStoriesByTopicItemTest UI test

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

@@ -277,6 +277,23 @@ class HomeScreenTest {
         }
     }
 
+    @Test
+    fun selectStoriesByTopicItemTest() {
+        activityTestRule.activityRule.applySettingsExceptions {
+            it.isRecentTabsFeatureEnabled = false
+            it.isRecentlyVisitedFeatureEnabled = false
+        }
+
+        homeScreen {
+        }.dismissOnboarding()
+
+        homeScreen {
+            verifyStoriesByTopicItemState(activityTestRule, false, 1)
+            clickStoriesByTopicItem(activityTestRule, 1)
+            verifyStoriesByTopicItemState(activityTestRule, true, 1)
+        }
+    }
+
     @Test
     fun verifyCustomizeHomepageTest() {
         val defaultWebPage = TestAssetHelper.getGenericAsset(mockWebServer, 1)

app/src/androidTest/java/org/mozilla/fenix/ui/robots/HomeScreenRobot.kt

@@ -10,6 +10,8 @@ import android.graphics.Bitmap
 import android.widget.EditText
 import androidx.compose.ui.test.assert
 import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.assertIsNotSelected
+import androidx.compose.ui.test.assertIsSelected
 import androidx.compose.ui.test.hasTestTag
 import androidx.compose.ui.test.hasText
 import androidx.compose.ui.test.junit4.ComposeTestRule
@@ -333,6 +335,21 @@ class HomeScreenRobot {
     fun verifyStoriesByTopicItems() =
         assertTrue(mDevice.findObject(UiSelector().resourceId("pocket.categories")).childCount > 1)
 
+    fun verifyStoriesByTopicItemState(composeTestRule: ComposeTestRule, isSelected: Boolean, position: Int) {
+        homeScreenList().scrollIntoView(mDevice.findObject(UiSelector().resourceId("pocket.header")))
+
+        if (isSelected) {
+            composeTestRule.onNodeWithTag("pocket.categories").assertIsDisplayed()
+            storyByTopicItem(composeTestRule, position).assertIsSelected()
+        } else {
+            composeTestRule.onNodeWithTag("pocket.categories").assertIsDisplayed()
+            storyByTopicItem(composeTestRule, position).assertIsNotSelected()
+        }
+    }
+
+    fun clickStoriesByTopicItem(composeTestRule: ComposeTestRule, position: Int) =
+        storyByTopicItem(composeTestRule, position).performClick()
+
     fun verifyPoweredByPocket(rule: ComposeTestRule) {
         homeScreenList().scrollIntoView(mDevice.findObject(UiSelector().resourceId("pocket.header")))
         rule.onNodeWithTag("pocket.header.title", true).assertIsDisplayed()
@@ -1087,6 +1104,9 @@ private fun sponsoredShortcut(sponsoredShortcutTitle: String) =
             .textContains(sponsoredShortcutTitle),
     )
 
+private fun storyByTopicItem(composeTestRule: ComposeTestRule, position: Int) =
+    composeTestRule.onNodeWithTag("pocket.categories").onChildAt(position - 1)
+
 val deleteFromHistory =
     onView(
         allOf(