### Question:
Collection extends DSpaceObject { public ItemIterator getAllItems() throws SQLException { String myQuery = "SELECT item.* FROM item, collection2item WHERE " + "item.item_id=collection2item.item_id AND " + "collection2item.collection_id= ? "; TableRowIterator rows = DatabaseManager.queryTable(ourContext, "item", myQuery,getID()); return new ItemIterator(ourContext, rows); } 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();  }### Answer:
@Test public void testGetAllItems() throws Exception { ItemIterator items = c.getAllItems(); assertThat("testGetAllItems 0", items, notNullValue()); assertFalse("testGetAllItems 1", items.hasNext()); assertThat("testGetAllItems 2", items.next(), nullValue()); assertThat("testGetAllItems 3", items.nextID(), equalTo(-1)); }