### Question:
Bitstream extends DSpaceObject { public void setSource(String n) { bRow.setColumn("source", n); modifiedMetadata = true; addDetails("Source"); } Bitstream(Context context, TableRow row); static Bitstream find(Context context, int id); static Bitstream[] findAll(Context context); int getID(); String getHandle(); int getSequenceID(); void setSequenceID(int sid); String getName(); void setName(String n); String getSource(); void setSource(String n); String getDescription(); void setDescription(String n); String getChecksum(); String getChecksumAlgorithm(); long getSize(); void setUserFormatDescription(String desc); String getUserFormatDescription(); String getFormatDescription(); BitstreamFormat getFormat(); void setFormat(BitstreamFormat f); void update(); InputStream retrieve(); Bundle[] getBundles(); int getType(); boolean isRegisteredBitstream(); int getStoreNumber(); DSpaceObject getParentObject();  }### Answer:
@Test public void testSetSource() { String source = "new source"; bs.setSource(source); assertThat("testSetSource 0", bs.getSource(), notNullValue()); assertThat("testSetSource 1", bs.getSource(), not(equalTo(""))); assertThat("testSetSource 2", bs.getSource(), equalTo(source)); }