### Question:
EntityTableModel extends AbstractTableModel { public int getColumnCount() { return d_props.size(); } EntityTableModel(Class<? extends Entity> entityType, ObservableList<? extends Entity> entities, List<String> properties, PresentationModelFactory pmf); int getColumnCount(); int getRowCount(); Object getValueAt(int row, int column); @Override String getColumnName(int columnIndex); @Override Class<?> getColumnClass(int columnIndex);  }### Answer:
@Test public void testGetColumnCount() { assertEquals(d_properties.size(), d_tableModel.getColumnCount()); }