Added UI test cases for testing this functionality.

* Improved the unit test cases for this functionality.

app/src/androidTest/java/org/kiwix/kiwixmobile/localLibrary/CopyMoveFileHandlerRobot.kt

@@ -21,6 +21,7 @@ package org.kiwix.kiwixmobile.localLibrary
 import androidx.test.espresso.Espresso.onView
 import androidx.test.espresso.action.ViewActions.click
 import androidx.test.espresso.assertion.ViewAssertions
+import androidx.test.espresso.assertion.ViewAssertions.doesNotExist
 import androidx.test.espresso.matcher.ViewMatchers
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.espresso.web.sugar.Web
@@ -50,6 +51,12 @@ class CopyMoveFileHandlerRobot : BaseRobot() {
     isVisible(TextId(R.string.copy_move_files_dialog_description))
   }
 
+  fun assertCopyMoveDialogNotDisplayed() {
+    testFlakyView({
+      onView(withText(R.string.copy_move_files_dialog_description)).check(doesNotExist())
+    })
+  }
+
   fun clickOnCopy() {
     testFlakyView({
       onView(withText(R.string.action_copy)).perform(click())

app/src/androidTest/java/org/kiwix/kiwixmobile/localLibrary/CopyMoveFileHandlerTest.kt

@@ -203,6 +203,19 @@ class CopyMoveFileHandlerTest : BaseActivityTest() {
     }
   }
 
+  private fun tryOpeningInvalidZimFiles(uri: Uri) {
+    UiThreadStatement.runOnUiThread {
+      val navHostFragment: NavHostFragment =
+        kiwixMainActivity.supportFragmentManager
+          .findFragmentById(R.id.nav_host_fragment) as NavHostFragment
+      val localLibraryFragment =
+        navHostFragment.childFragmentManager.fragments[0] as LocalLibraryFragment
+      localLibraryFragment.handleSelectedFileUri(
+        uri,
+      )
+    }
+  }
+
   private fun getSelectedFile(): File {
     val loadFileStream =
       CopyMoveFileHandlerTest::class.java.classLoader.getResourceAsStream("testzim.zim")
@@ -225,6 +238,16 @@ class CopyMoveFileHandlerTest : BaseActivityTest() {
     return zimFile
   }
 
+  private fun getInvalidZimFileUri(extension: String): Uri {
+    val zimFile = File(
+      ContextCompat.getExternalFilesDirs(context, null)[0],
+      "testzim$extension"
+    )
+    if (zimFile.exists()) zimFile.delete()
+    zimFile.createNewFile()
+    return Uri.fromFile(zimFile)
+  }
+
   @Test
   fun testGetDestinationFile() {
     activityScenario.onActivity {
@@ -272,6 +295,33 @@ class CopyMoveFileHandlerTest : BaseActivityTest() {
     }
   }
 
+  @Test
+  fun testInvalidFileShouldNotOpenInReader() {
+    deleteAllFilesInDirectory(parentFile)
+    // Test the scenario in playStore build on Android 11 and above.
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+      selectedFile = getSelectedFile()
+      activityScenario.onActivity {
+        kiwixMainActivity = it
+        kiwixMainActivity.navigate(R.id.libraryFragment)
+      }
+      copyMoveFileHandler(CopyMoveFileHandlerRobot::pauseForBetterTestPerformance)
+      sharedPreferenceUtil.apply {
+        copyMoveZimFilePermissionDialog = true
+        setIsPlayStoreBuildType(true)
+      }
+      // test opening images
+      tryOpeningInvalidZimFiles(getInvalidZimFileUri(".jpg"))
+      copyMoveFileHandler(CopyMoveFileHandlerRobot::assertCopyMoveDialogNotDisplayed)
+      // test opening videos
+      tryOpeningInvalidZimFiles(getInvalidZimFileUri(".mp4"))
+      copyMoveFileHandler(CopyMoveFileHandlerRobot::assertCopyMoveDialogNotDisplayed)
+      // test opening pdf
+      tryOpeningInvalidZimFiles(getInvalidZimFileUri(".pdf"))
+      copyMoveFileHandler(CopyMoveFileHandlerRobot::assertCopyMoveDialogNotDisplayed)
+    }
+  }
+
   private suspend fun deleteBothPreviousFiles() {
     selectedFile.deleteFile()
     destinationFile.deleteFile()

app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/CopyMoveFileHandler.kt

@@ -72,7 +72,7 @@ class CopyMoveFileHandler @Inject constructor(
   private var progressBar: ProgressBar? = null
   private var progressBarTextView: TextView? = null
   var isMoveOperation = false
-  private var shouldValidateZimFile: Boolean = false
+  var shouldValidateZimFile: Boolean = false
   private var fileSystemDisposable: Disposable? = null
 
   private val copyMoveTitle: String by lazy {
@@ -275,7 +275,6 @@ class CopyMoveFileHandler @Inject constructor(
     return try {
       val contentResolver = activity.contentResolver
       if (documentCanMove(selectedUri, contentResolver)) {
-
         DocumentsContract.moveDocument(
           contentResolver,
           selectedUri,

app/src/test/java/org/kiwix/kiwixmobile/localLibrary/CopyMoveFileHandlerTest.kt

@@ -28,7 +28,6 @@ import io.mockk.coVerify
 import io.mockk.every
 import io.mockk.just
 import io.mockk.mockk
-import io.mockk.mockkConstructor
 import io.mockk.slot
 import io.mockk.spyk
 import io.mockk.verify
@@ -40,6 +39,7 @@ import org.junit.jupiter.api.Assertions.assertFalse
 import org.junit.jupiter.api.Assertions.assertTrue
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
+import org.kiwix.kiwixmobile.core.R
 import org.kiwix.kiwixmobile.core.settings.StorageCalculator
 import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
 import org.kiwix.kiwixmobile.core.utils.dialog.AlertDialogShower
@@ -51,9 +51,6 @@ import org.kiwix.kiwixmobile.zimManager.Fat32Checker.FileSystemState.CanWrite4Gb
 import org.kiwix.kiwixmobile.zimManager.Fat32Checker.FileSystemState.CannotWrite4GbFile
 import org.kiwix.kiwixmobile.zimManager.Fat32Checker.FileSystemState.DetectingFileSystem
 import java.io.File
-import org.kiwix.kiwixmobile.core.R
-import org.kiwix.kiwixmobile.core.reader.ZimReaderSource
-import org.kiwix.libzim.Archive
 
 class CopyMoveFileHandlerTest {
   private lateinit var fileHandler: CopyMoveFileHandler
@@ -332,11 +329,9 @@ class CopyMoveFileHandlerTest {
 
   @Test
   fun `notifyFileOperationSuccess should handle invalid ZIM file`() = runTest {
-    mockkConstructor(Archive::class)
-    val archiveMock = mockk<Archive>(relaxed = true)
-    every { constructedWith<Archive>(any()) } returns archiveMock
+    fileHandler = spyk(fileHandler)
+    fileHandler.shouldValidateZimFile = true
     coEvery { fileHandler.isValidZimFile(destinationFile) } returns false
-
     fileHandler.notifyFileOperationSuccess(destinationFile, sourceUri)
 
     verify { fileHandler.handleInvalidZimFile(destinationFile, sourceUri) }
@@ -344,7 +339,9 @@ class CopyMoveFileHandlerTest {
 
   @Test
   fun `handleInvalidZimFile should call onError if move is successful`() {
+    fileHandler = spyk(fileHandler)
     every { fileHandler.tryMoveWithDocumentContract(any(), any(), any()) } returns true
+    every { destinationFile.parentFile } returns mockk()
     fileHandler.isMoveOperation = true
 
     fileHandler.handleInvalidZimFile(destinationFile, sourceUri)
@@ -355,7 +352,9 @@ class CopyMoveFileHandlerTest {
 
   @Test
   fun `handleInvalidZimFile should delete file and show error if move fails`() {
+    fileHandler = spyk(fileHandler)
     every { fileHandler.tryMoveWithDocumentContract(any(), any(), any()) } returns false
+    every { destinationFile.parentFile } returns mockk()
     fileHandler.isMoveOperation = true
 
     fileHandler.handleInvalidZimFile(destinationFile, sourceUri)
@@ -368,26 +367,6 @@ class CopyMoveFileHandlerTest {
     }
   }
 
-  @Test
-  fun `isValidZimFile should return true if ZIM file has main entry`() = runTest {
-    val archive: Archive = mockk()
-    every { archive.hasMainEntry() } returns true
-    coEvery { ZimReaderSource(destinationFile).createArchive() } returns archive
-
-    val result = fileHandler.isValidZimFile(destinationFile)
-
-    assertTrue(result)
-  }
-
-  @Test
-  fun `isValidZimFile should return false if ZIM file creation fails`() = runTest {
-    coEvery { ZimReaderSource(destinationFile).createArchive() } throws Exception()
-
-    val result = fileHandler.isValidZimFile(destinationFile)
-
-    assertFalse(result)
-  }
-
   @AfterEach
   fun dispose() {
     fileHandler.dispose()