17、可执行场景的编写与组织

可执行场景的编写与组织

1. 富有表现力的场景：模式与反模式

1.1 简化场景示例

考虑一个在线银行注册的场景。最初的描述可能是这样：

When he submits his application online
Then his application should be created in a pending state
And he should be sent a PDF contract to sign by email

这个版本没有提及用户界面，主要关注提交过程和预期结果。我们可以进一步简化，去除不必要的细节：

Scenario: Register for online banking
Given that Bill wants to register for online banking
When he submits his application online
Then his application should be created in a pending state
And he should be sent a PDF contract to sign by email

一个好的场景应该只包含有助于传达核心业务操作的信息，其他的都是冗余的。

1.2 编写富有表现力的 Then 步骤

Then 步骤是进行测试的地方，用于描述预期的结果。新的 BDD 实践者常见的反模式是混淆 W