change.addColumn(column1);
ColumnConfig column2 = new ColumnConfig();
column2.setName("column2");
change.addColumn(column2);
SqlStatement[] statements = change.generateStatements(new MockDatabase());
Assert.assertEquals(1, statements.length);
Assert.assertTrue(statements[0] instanceof DropColumnStatement);
DropColumnStatement stmt = (DropColumnStatement)statements[0];
Assert.assertTrue(stmt.isMultiple());
Assert.assertEquals(2, stmt.getColumns().size());