Allow toggling of final shareousel item

When no items selected the UI will:
* change the chooser headline;
* make the custom action row invisible;
* make all targets disabled and all target icons greyscale.

Fix: 349468879
Test: atest IntentResolver-tests-unit
Test: manual functionality testing
Flag: com.android.intentresolver.unselect_final_item

Change-Id: I53b9c908943b1f1003cb0131a6dec8abc26ec782

2 files changed, 37 insertions, 0 deletions

diff --git a/tests/unit/src/com/android/intentresolver/contentpreview/payloadtoggle/domain/interactor/SelectionInteractorTest.kt b/tests/unit/src/com/android/intentresolver/contentpreview/payloadtoggle/domain/interactor/SelectionInteractorTest.kt
index 87db243d..c8242333 100644
--- a/tests/unit/src/com/android/intentresolver/contentpreview/payloadtoggle/domain/interactor/SelectionInteractorTest.kt
+++ b/tests/unit/src/com/android/intentresolver/contentpreview/payloadtoggle/domain/interactor/SelectionInteractorTest.kt
@@ -18,16 +18,24 @@ package com.android.intentresolver.contentpreview.payloadtoggle.domain.interacto
 
 import android.content.Intent
 import android.net.Uri
+import android.platform.test.annotations.DisableFlags
+import android.platform.test.annotations.EnableFlags
+import android.platform.test.flag.junit.SetFlagsRule
+import com.android.intentresolver.Flags
 import com.android.intentresolver.contentpreview.mimetypeClassifier
 import com.android.intentresolver.contentpreview.payloadtoggle.data.repository.previewSelectionsRepository
 import com.android.intentresolver.contentpreview.payloadtoggle.shared.model.PreviewModel
 import com.android.intentresolver.util.runKosmosTest
 import com.google.common.truth.Truth.assertThat
 import kotlinx.coroutines.flow.first
+import org.junit.Rule
 import org.junit.Test
 
 class SelectionInteractorTest {
+    @get:Rule val flagsRule = SetFlagsRule()
+
     @Test
+    @DisableFlags(Flags.FLAG_UNSELECT_FINAL_ITEM)
     fun singleSelection_removalPrevented() = runKosmosTest {
         val initialPreview =
             PreviewModel(
@@ -54,6 +62,33 @@ class SelectionInteractorTest {
     }
 
     @Test
+    @EnableFlags(Flags.FLAG_UNSELECT_FINAL_ITEM)
+    fun singleSelection_itemRemovedNoPendingIntentUpdates() = runKosmosTest {
+        val initialPreview =
+            PreviewModel(
+                uri = Uri.fromParts("scheme", "ssp", "fragment"),
+                mimeType = null,
+                order = 0
+            )
+        previewSelectionsRepository.selections.value = mapOf(initialPreview.uri to initialPreview)
+
+        val underTest =
+            SelectionInteractor(
+                previewSelectionsRepository,
+                { Intent() },
+                updateTargetIntentInteractor,
+                mimetypeClassifier,
+            )
+
+        assertThat(underTest.selections.first()).containsExactly(initialPreview.uri)
+
+        underTest.unselect(initialPreview)
+
+        assertThat(underTest.selections.first()).isEmpty()
+        assertThat(previewSelectionsRepository.selections.value).isEmpty()
+    }
+
+    @Test
     fun multipleSelections_removalAllowed() = runKosmosTest {
         val first =
             PreviewModel(
diff --git a/tests/unit/src/com/android/intentresolver/contentpreview/payloadtoggle/ui/viewmodel/ShareouselViewModelTest.kt b/tests/unit/src/com/android/intentresolver/contentpreview/payloadtoggle/ui/viewmodel/ShareouselViewModelTest.kt
index 1047d145..fc7ac751 100644
--- a/tests/unit/src/com/android/intentresolver/contentpreview/payloadtoggle/ui/viewmodel/ShareouselViewModelTest.kt
+++ b/tests/unit/src/com/android/intentresolver/contentpreview/payloadtoggle/ui/viewmodel/ShareouselViewModelTest.kt
@@ -347,6 +347,8 @@ class ShareouselViewModelTest {
                 override fun getVideosHeadline(count: Int): String = "VIDEOS: $count"
 
                 override fun getFilesHeadline(count: Int): String = "FILES: $count"
+
+                override fun getNotItemsSelectedHeadline() = "Select items to share"
             }
         // instantiate the view model, and then runCurrent() so that it is fully hydrated before
         // starting the test