@Test
public void testGetColumnKeys() {

    ColumnStore<Node> store = new ColumnStore(Node.class, false);
    ColumnImpl col = new ColumnImpl("0", Integer.class, null, null, Origin.DATA, false, false);
    store.addColumn(col);
    ObjectSet<String> set = new ObjectOpenHashSet<String>();
    set.add("0");
    Assert.assertEquals(store.getColumnKeys(), set);
}