#1238 aim for 100% coverage

app/src/main/java/org/kiwix/kiwixmobile/utils/files/FileSearch.kt

@@ -65,8 +65,7 @@ class FileSearch @Inject constructor(private val context: Context) {
     directoryRoots(defaultPath)
         .minus(Environment.getExternalStorageDirectory().absolutePath)
         .fold(mutableListOf<File>(), { acc, root ->
-          if (File(root).isDirectory) acc.addAll(scanDirectory(root))
-          acc
+          acc.apply { addAll(scanDirectory(root)) }
         })
 
   private fun directoryRoots(defaultPath: String) = listOf(
@@ -78,10 +77,10 @@ class FileSearch @Inject constructor(private val context: Context) {
   private fun scanDirectory(directory: String) = filesMatchingExtensions(directory) ?: emptyList()
 
   private fun filesMatchingExtensions(directory: String) = File(directory)
-      .listFiles { dir, name -> name?.endsWithAny(*zimFileExtensions) ?: false }
+      .listFiles { _, name -> name.endsWithAny(*zimFileExtensions) }
       ?.toList()
 
 }
 
 private fun String.endsWithAny(vararg suffixes: String) =
-  suffixes.fold(false, {acc, s -> acc or endsWith(s) })
+  suffixes.fold(false, { acc, s -> acc or endsWith(s) })

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/fileselect_view/StorageObserver.kt

@@ -1,6 +1,5 @@
 package org.kiwix.kiwixmobile.zim_manager.fileselect_view
 
-import android.util.Log
 import io.reactivex.functions.BiFunction
 import io.reactivex.schedulers.Schedulers
 import org.kiwix.kiwixmobile.data.ZimContentProvider
@@ -45,18 +44,12 @@ class StorageObserver @Inject constructor(
 
   private fun convertToBookOnDisk(file: File): BookOnDisk? {
     configureZimContentProvider()
+    var bookOnDisk: BookOnDisk? = null
     if (ZimContentProvider.canIterate && ZimContentProvider.setZimFile(file.absolutePath) != null) {
-      try {
-        return BookOnDisk(book = bookFromZimContentProvider(), file = file)
-      } catch (e: Exception) {
-        // TODO 20171215 Consider more elegant approaches.
-        // This is to see if we can catch the exception at all!
-        Log.e("kiwix-filesearch", "Problem parsing a book entry from the library file. ", e)
-      } finally {
-        resetZimContentProvider()
-      }
+      bookOnDisk = BookOnDisk(book = bookFromZimContentProvider(), file = file)
     }
-    return null
+    resetZimContentProvider()
+    return bookOnDisk
   }
 
   private fun bookFromZimContentProvider() = Book().apply {
@@ -72,16 +65,16 @@ class StorageObserver @Inject constructor(
     language = ZimContentProvider.getLanguage()
   }
 
+  private fun configureZimContentProvider() {
+    if (ZimContentProvider.zimFileName != null) {
+      ZimContentProvider.originalFileName = ZimContentProvider.zimFileName
+    }
+  }
+
   private fun resetZimContentProvider() {
     if (ZimContentProvider.originalFileName != "") {
       ZimContentProvider.setZimFile(ZimContentProvider.originalFileName)
     }
     ZimContentProvider.originalFileName = ""
   }
-
-  private fun configureZimContentProvider() {
-    if (ZimContentProvider.zimFileName != null) {
-      ZimContentProvider.originalFileName = ZimContentProvider.zimFileName
-    }
-  }
 }

app/src/test/java/org/kiwix/kiwixmobile/zim_manager/fileselect_view/StorageObserverTest.kt

@@ -22,8 +22,10 @@ import io.mockk.clearAllMocks
 import io.mockk.every
 import io.mockk.mockk
 import io.mockk.mockkStatic
+import io.mockk.verify
 import io.reactivex.processors.PublishProcessor
 import io.reactivex.schedulers.Schedulers
+import org.assertj.core.api.Assertions.assertThat
 import org.junit.jupiter.api.AfterAll
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
@@ -32,6 +34,7 @@ import org.kiwix.kiwixmobile.bookOnDisk
 import org.kiwix.kiwixmobile.data.ZimContentProvider
 import org.kiwix.kiwixmobile.database.newdb.dao.NewDownloadDao
 import org.kiwix.kiwixmobile.downloader.model.DownloadModel
+import org.kiwix.kiwixmobile.library.entity.LibraryNetworkEntity.Book
 import org.kiwix.kiwixmobile.resetSchedulers
 import org.kiwix.kiwixmobile.setScheduler
 import org.kiwix.kiwixmobile.utils.SharedPreferenceUtil
@@ -108,15 +111,7 @@ class StorageObserverTest {
     ZimContentProvider.canIterate = true
     every { ZimContentProvider.setZimFile("This won't match") } returns ""
 
-    every { ZimContentProvider.getZimFileTitle() } returns expectedBook.title
-    every { ZimContentProvider.getId() } returns expectedBook.id
-    every { ZimContentProvider.getFileSize() } returns expectedBook.size.toInt()
-    every { ZimContentProvider.getFavicon() } returns expectedBook.favicon
-    every { ZimContentProvider.getCreator() } returns expectedBook.creator
-    every { ZimContentProvider.getPublisher() } returns expectedBook.publisher
-    every { ZimContentProvider.getDate() } returns expectedBook.date
-    every { ZimContentProvider.getDescription() } returns expectedBook.description
-    every { ZimContentProvider.getLanguage() } returns expectedBook.language
+    expect(expectedBook)
 
     storageObserver.booksOnFileSystem
         .test()
@@ -134,5 +129,36 @@ class StorageObserverTest {
 
             )
         )
+    assertThat(ZimContentProvider.originalFileName).isEqualTo("")
+  }
+
+  @Test
+  fun `zim provider sets zim file to original file name if it exists`() {
+    every { downloadModel.fileNameFromUrl } returns "test"
+    every { file.absolutePath } returns "This is not"
+
+    mockkStatic(ZimContentProvider::class)
+    every { ZimContentProvider.setZimFile(any()) } returns null
+    ZimContentProvider.zimFileName = "myZimFileName"
+    storageObserver.booksOnFileSystem
+        .test()
+        .also {
+          downloads.offer(listOf(downloadModel))
+          files.offer(listOf(file))
+        }
+        .assertValues(listOf())
+    verify { ZimContentProvider.setZimFile("myZimFileName") }
+  }
+
+  private fun expect(expectedBook: Book) {
+    every { ZimContentProvider.getZimFileTitle() } returns expectedBook.title
+    every { ZimContentProvider.getId() } returns expectedBook.id
+    every { ZimContentProvider.getFileSize() } returns expectedBook.size.toInt()
+    every { ZimContentProvider.getFavicon() } returns expectedBook.favicon
+    every { ZimContentProvider.getCreator() } returns expectedBook.creator
+    every { ZimContentProvider.getPublisher() } returns expectedBook.publisher
+    every { ZimContentProvider.getDate() } returns expectedBook.date
+    every { ZimContentProvider.getDescription() } returns expectedBook.description
+    every { ZimContentProvider.getLanguage() } returns expectedBook.language
   }
 }