Testing slideshow deletion for localOnly and offline

Signed-off-by: Philipp Hasper <vcs@hasper.info>

Author: PhilLab

app/src/androidTest/java/com/nextcloud/test/ConnectivityServiceOfflineMock.kt

@@ -0,0 +1,23 @@
+/*
+ * Nextcloud - Android Client
+ *
+ * SPDX-FileCopyrightText: 2025 Philipp Hasper <vcs@hasper.info>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+package com.nextcloud.test
+
+import com.nextcloud.client.network.Connectivity
+import com.nextcloud.client.network.ConnectivityService
+
+/** A mocked connectivity service returning that the device is offline **/
+class ConnectivityServiceOfflineMock : ConnectivityService {
+    override fun isNetworkAndServerAvailable(callback: ConnectivityService.GenericCallback<Boolean>) {
+        callback.onComplete(false)
+    }
+
+    override fun isConnected(): Boolean = false
+
+    override fun isInternetWalled(): Boolean = false
+
+    override fun getConnectivity(): Connectivity = Connectivity.CONNECTED_WIFI
+}

app/src/androidTest/java/com/owncloud/android/ui/preview/PreviewImageActivityIT.kt

@@ -21,6 +21,7 @@ import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
 import androidx.test.espresso.matcher.ViewMatchers.isRoot
 import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.matcher.ViewMatchers.withText
+import com.nextcloud.test.ConnectivityServiceOfflineMock
 import com.nextcloud.test.LoopFailureHandler
 import com.owncloud.android.AbstractOnServerIT
 import com.owncloud.android.R
@@ -110,4 +111,24 @@ class PreviewImageActivityIT : AbstractOnServerIT() {
             }
         }
     }
+
+    @Test
+    fun deleteFromSlideshow_localOnly_offline() {
+        // Prepare local test data
+        val imageCount = 10
+        createMockedImageFiles(imageCount, localOnly = true)
+
+        // Launch the activity with the first image
+        val intent = PreviewImageActivity.previewFileIntent(targetContext, user, testFiles[0])
+        launchActivity<PreviewImageActivity>(intent).use { scenario ->
+            scenario.onActivity { activity ->
+                activity.connectivityService = ConnectivityServiceOfflineMock()
+            }
+            onView(isRoot()).check(matches(isDisplayed()))
+
+            for (i in 0 until imageCount) {
+                veryImageThenDelete(i)
+            }
+        }
+    }
 }