Add testcase for Nero M4A chapters (AntennaPod#4311)

This commit adds testcases that verify whether the application correctly parses Nero type M4A chapters.

parser/media/src/test/java/de/danoeh/antennapod/parser/media/m4a/M4AChapterReaderTest.java

@@ -0,0 +1,39 @@
+package de.danoeh.antennapod.parser.media.m4a;
+
+import de.danoeh.antennapod.model.feed.Chapter;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(RobolectricTestRunner.class)
+public class M4AChapterReaderTest {
+
+    @Test
+    public void testRealFilesAuphonic() throws IOException {
+        testRealFileAuphonic("nero-chapters.m4a");
+    }
+
+    public void testRealFileAuphonic(String filename) throws IOException {
+        InputStream inputStream = getClass().getClassLoader()
+                .getResource(filename).openStream();
+        M4AChapterReader reader = new M4AChapterReader(inputStream);
+        reader.readInputStream();
+        List<Chapter> chapters = reader.getChapters();
+
+        assertEquals(3, chapters.size());
+
+        assertEquals(0, chapters.get(0).getStart());
+        assertEquals(23000, chapters.get(1).getStart());
+        assertEquals(67000, chapters.get(2).getStart());
+
+        assertEquals("An intro to video chapters", chapters.get(0).getTitle());
+        assertEquals("How to set up video chapters", chapters.get(1).getTitle());
+        assertEquals("See video chapters in action", chapters.get(2).getTitle());
+    }
+}