### Question:
Collection extends DSpaceObject { public String getMetadata(String field) { String metadata = collectionRow.getStringColumn(field); return (metadata == null) ? "" : metadata; } Collection(Context context, TableRow row); static Collection find(Context context, int id); static Collection[] findAll(Context context); ItemIterator getItems(); ItemIterator getAllItems(); int getID(); String getHandle(); String getMetadata(String field); void setMetadata(String field, String value); String getName(); Bitstream getLogo(); Bitstream setLogo(InputStream is); Group createWorkflowGroup(int step); void setWorkflowGroup(int step, Group g); Group getWorkflowGroup(int step); Group createSubmitters(); void removeSubmitters(); Group getSubmitters(); Group createAdministrators(); void removeAdministrators(); Group getAdministrators(); String getLicense(); String getLicenseCollection(); boolean hasCustomLicense(); void setLicense(String license); Item getTemplateItem(); void createTemplateItem(); void removeTemplateItem(); void addItem(Item item); void removeItem(Item item); void update(); boolean canEditBoolean(); boolean canEditBoolean(boolean useInheritance); void canEdit(); void canEdit(boolean useInheritance); Community[] getCommunities(); @Override boolean equals(Object other); @Override int hashCode(); int getType(); static Collection[] findAuthorized(Context context, Community comm,
            int actionID); int countItems(); DSpaceObject getAdminObject(int action); @Override DSpaceObject getParentObject(); boolean epersonIsReviewer();  }### Answer:
@Test public void testGetMetadata() { assertThat("testGetMetadata 0",c.getMetadata("name"), equalTo("")); assertThat("testGetMetadata 1",c.getMetadata("short_description"), equalTo("")); assertThat("testGetMetadata 2",c.getMetadata("introductory_text"), equalTo("")); assertThat("testGetMetadata 3",c.getMetadata("logo_bitstream_id"), equalTo("")); assertThat("testGetMetadata 4",c.getMetadata("copyright_text"), equalTo("")); assertThat("testGetMetadata 5",c.getMetadata("template_item_id"), equalTo("")); assertThat("testGetMetadata 6",c.getMetadata("provenance_description"), equalTo("")); assertThat("testGetMetadata 7",c.getMetadata("side_bar_text"), equalTo("")); assertThat("testGetMetadata 8",c.getMetadata("license"), equalTo("")); }