Added unit test for shownotes

app/src/androidTest/java/de/test/antennapod/feed/FeedItemTest.java

@@ -0,0 +1,35 @@
+package de.test.antennapod.feed;
+
+import android.test.AndroidTestCase;
+import de.danoeh.antennapod.core.feed.FeedItem;
+
+public class FeedItemTest extends AndroidTestCase {
+
+    public void testShownoteLength() throws Exception {
+        FeedItem item = new FeedItem();
+
+        item.setDescription(null);
+        item.setContentEncoded("Hello world");
+        assertEquals("Hello world", item.loadShownotes().call());
+
+        item.setDescription("");
+        item.setContentEncoded("Hello world");
+        assertEquals("Hello world", item.loadShownotes().call());
+
+        item.setDescription("Hello world");
+        item.setContentEncoded(null);
+        assertEquals("Hello world", item.loadShownotes().call());
+
+        item.setDescription("Hello world");
+        item.setContentEncoded("");
+        assertEquals("Hello world", item.loadShownotes().call());
+
+        item.setDescription("Hi");
+        item.setContentEncoded("Hello world");
+        assertEquals("Hello world", item.loadShownotes().call());
+
+        item.setDescription("Hello world");
+        item.setContentEncoded("Hi");
+        assertEquals("Hello world", item.loadShownotes().call());
+    }
+}