Add integration test for folders with large amounts of files

This test reproduces the SQLiteCursor crashes.

Co-authored-by: Tobias Kaminsky <tobias@kaminsky.me>
Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

src/androidTest/java/com/owncloud/android/datamodel/FileDataStorageManagerContentResolverIT.java

@@ -1,32 +0,0 @@
-/*
- *
- * Nextcloud Android client application
- *
- * @author Tobias Kaminsky
- * Copyright (C) 2020 Tobias Kaminsky
- * Copyright (C) 2020 Nextcloud GmbH
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.owncloud.android.datamodel;
-
-public class FileDataStorageManagerContentResolverIT extends FileDataStorageManagerIT {
-    @Override
-    public void before() {
-        sut = new FileDataStorageManager(user, targetContext.getContentResolver());
-
-        super.before();
-    }
-}

src/androidTest/java/com/owncloud/android/datamodel/FileDataStorageManagerContentResolverIT.kt

@@ -0,0 +1,71 @@
+/*
+ *
+ * Nextcloud Android client application
+ *
+ * @author Tobias Kaminsky
+ * Copyright (C) 2020 Tobias Kaminsky
+ * Copyright (C) 2020 Nextcloud GmbH
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.owncloud.android.datamodel
+
+import org.junit.Assert
+import org.junit.Test
+import java.util.ArrayList
+
+class FileDataStorageManagerContentResolverIT : FileDataStorageManagerIT() {
+    companion object {
+        private const val MANY_FILES_AMOUNT = 5000
+    }
+
+    override fun before() {
+        sut = FileDataStorageManager(user, targetContext.contentResolver)
+        super.before()
+    }
+
+    /**
+     * only on FileDataStorageManager
+     */
+    @Test
+    fun testFolderWithManyFiles() {
+        // create folder
+        val folderA = OCFile("/folderA/", "00001") // remote Id must never be null
+        folderA.setFolder().parentId = sut.getFileByDecryptedRemotePath("/")!!.fileId
+        sut.saveFile(folderA)
+        Assert.assertTrue(sut.fileExists("/folderA/"))
+        Assert.assertEquals(0, sut.getFolderContent(folderA, false).size)
+        val folderAId = sut.getFileByDecryptedRemotePath("/folderA/")!!.fileId
+
+        // create files
+        val newFiles = (1..MANY_FILES_AMOUNT).map {
+            val file = OCFile("/folderA/file$it", it.toString())
+            file.parentId = folderAId
+            sut.saveFile(file)
+
+            val storedFile = sut.getFileByDecryptedRemotePath("/folderA/file$it")
+            Assert.assertNotNull(storedFile)
+            storedFile
+        }
+
+        // save files in folder
+        sut.saveFolder(
+            folderA,
+            newFiles,
+            ArrayList()
+        )
+        // check file count is correct
+        Assert.assertEquals(MANY_FILES_AMOUNT, sut.getFolderContent(folderA, false).size)
+    }
+}