我已经实现了 JSqlparser 的访问者来解析 SQL 查询。代码工作得很好。我不确定如何为这些访问者进行单元测试。例如我有以下 sql 语句:
Select a.a1, a.a2 from foo as a
为了解析它,我实现了 StatementVisitor 接口,我的代码如下所示:
public class StmntVisitorImpl implements StatementVisitor {
@Override
public void visit(Select select) {
LOG.debug("Begin Select visit : "+select.toString());
SelectVisitor selectVisitor = new SelectVisitorImpl();
select.getSelectBody().accept(selectVisitor);
if(select.getWithItemsList()!=null && !select.getWithItemsList().isEmpty()){
select.getWithItemsList().stream()
.forEach(wth -> wth.accept(selectVisitor));
}
}
@Override
public void visit(Delete delete) {}
@Override
public void visit(Update update) {}
@Override
public void visit(Insert insert) {}
@Override
public void visit(Replace replace) {}
@Override
public void visit(Drop drop) {}
}
然后我在另一个类中调用它,如下所示:
String sql = "Select a.a1, a.a2 from foo as a";
CCJSqlParserManager parserManager = new CCJSqlParserManager();
StatementVisitor statementVisitor = new StmntVisitorImpl ();
Statement sqlStatement = parserManager.parse(new StringReader(sql));
sqlStatement.accept(statementVisitor);
我想为我的 StmntVisitorImpl、SelectVisitorImpl 和其他实现 JSqlparser 给出的访问者接口的类编写单元测试用例。我该怎么做?