From 43c747d9837d24b4b4fc43f9a4c6abb9222873d8 Mon Sep 17 00:00:00 2001
From: Herbert Reiter <46045854+damoasda@users.noreply.github.com>
Date: Thu, 31 Dec 2020 22:00:12 +0100
Subject: Run DbNullCleanupAlgorithmTest with Robolectric

---
 .../core/storage/DbNullCleanupAlgorithmTest.java   | 119 +++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 core/src/test/java/de/danoeh/antennapod/core/storage/DbNullCleanupAlgorithmTest.java

(limited to 'core/src/test')

diff --git a/core/src/test/java/de/danoeh/antennapod/core/storage/DbNullCleanupAlgorithmTest.java b/core/src/test/java/de/danoeh/antennapod/core/storage/DbNullCleanupAlgorithmTest.java
new file mode 100644
index 000000000..b057b9f6d
--- /dev/null
+++ b/core/src/test/java/de/danoeh/antennapod/core/storage/DbNullCleanupAlgorithmTest.java
@@ -0,0 +1,119 @@
+package de.danoeh.antennapod.core.storage;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import androidx.preference.PreferenceManager;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import de.danoeh.antennapod.core.feed.Feed;
+import de.danoeh.antennapod.core.feed.FeedItem;
+import de.danoeh.antennapod.core.feed.FeedMedia;
+import de.danoeh.antennapod.core.preferences.UserPreferences;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests that the APNullCleanupAlgorithm is working correctly.
+ */
+@RunWith(RobolectricTestRunner.class)
+public class DbNullCleanupAlgorithmTest {
+
+    private static final int EPISODE_CACHE_SIZE = 5;
+
+    private Context context;
+
+    private File destFolder;
+
+    @Before
+    public void setUp() {
+        context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        destFolder = context.getExternalCacheDir();
+        cleanupDestFolder(destFolder);
+        assertNotNull(destFolder);
+        assertTrue(destFolder.exists());
+        assertTrue(destFolder.canWrite());
+
+        // create new database
+        PodDBAdapter.init(context);
+        PodDBAdapter.deleteDatabase();
+        PodDBAdapter adapter = PodDBAdapter.getInstance();
+        adapter.open();
+        adapter.close();
+
+        SharedPreferences.Editor prefEdit = PreferenceManager.getDefaultSharedPreferences(context
+                .getApplicationContext()).edit();
+        prefEdit.putString(UserPreferences.PREF_EPISODE_CACHE_SIZE, Integer.toString(EPISODE_CACHE_SIZE));
+        prefEdit.putString(UserPreferences.PREF_EPISODE_CLEANUP,
+                Integer.toString(UserPreferences.EPISODE_CLEANUP_NULL));
+        prefEdit.commit();
+
+        UserPreferences.init(context);
+    }
+
+    @After
+    public void tearDown() {
+        assertTrue(PodDBAdapter.deleteDatabase());
+
+        cleanupDestFolder(destFolder);
+        assertTrue(destFolder.delete());
+    }
+
+    private void cleanupDestFolder(File destFolder) {
+        //noinspection ConstantConditions
+        for (File f : destFolder.listFiles()) {
+            assertTrue(f.delete());
+        }
+    }
+
+    /**
+     * A test with no items in the queue, but multiple items downloaded.
+     * The null algorithm should never delete any items, even if they're played and not in the queue.
+     */
+    @Test
+    public void testPerformAutoCleanupShouldNotDelete() throws IOException {
+        final int numItems = EPISODE_CACHE_SIZE * 2;
+
+        Feed feed = new Feed("url", null, "title");
+        List<FeedItem> items = new ArrayList<>();
+        feed.setItems(items);
+        List<File> files = new ArrayList<>();
+        for (int i = 0; i < numItems; i++) {
+            FeedItem item = new FeedItem(0, "title", "id", "link", new Date(), FeedItem.PLAYED, feed);
+
+            File f = new File(destFolder, "file " + i);
+            assertTrue(f.createNewFile());
+            files.add(f);
+            item.setMedia(new FeedMedia(0, item, 1, 0, 1L, "m", f.getAbsolutePath(), "url", true,
+                    new Date(numItems - i), 0, 0));
+            items.add(item);
+        }
+
+        PodDBAdapter adapter = PodDBAdapter.getInstance();
+        adapter.open();
+        adapter.setCompleteFeed(feed);
+        adapter.close();
+
+        assertTrue(feed.getId() != 0);
+        for (FeedItem item : items) {
+            assertTrue(item.getId() != 0);
+            //noinspection ConstantConditions
+            assertTrue(item.getMedia().getId() != 0);
+        }
+        DBTasks.performAutoCleanup(context);
+        for (int i = 0; i < files.size(); i++) {
+            assertTrue(files.get(i).exists());
+        }
+    }
+}
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