问题描述

TL;DR;如何创建一个调用另一个测试作为第一步的 specflow 测试?

Given I already have one specflow test
And I want to run another test that goes deeper than the first test  
Then I create a second test that runs the first test as its first step
And I add additional steps to test the deeper functionality

抱歉，这里有点规范流幽默.

Sorry, little bit of specflow humor there.

例如，我已经有一个测试可以创建销售:

eg I have a test that creates a sale already:

Given I want to create a sales order
And I open the sales order page
And I click the add new order button
Then a new sales order is created

我想进行另一个测试来测试添加销售线

And I want to have another test that tests adding a sales line

另一个测试完成销售的测试

And another test that tests completing the sale

另一个取消销售的测试

然后……等等

所有这些测试都将从与简单测试相同的前四个步骤开始，这违反了 DRY 原则.那么我该怎么做才能让第二个测试的第一步只运行第一个测试呢?例如:

All of those tests would start with the same first four steps as the simple test, which breaks the DRY principle. So how can I do it so that the first step of the 2nd test just runs the first test? eg something like:

Given I have run the create sales order test  // right here it just runs the first test
And I add a sales order line
Then the order total is updated

如果每个测试都以相同的前四行开始，后来我意识到我需要更改简单的 create sale 测试，那么我还需要去寻找并修复重复这四行的其他地方.

If every test starts off with the same first four lines, and later on I realize that I need to change the simple create sale test, then I will also need to go and find and fix everywhere else that repeats those four lines.

请注意，这也应该能够跨功能工作.例如，上面的简单测试是在销售功能中定义的.但我也会有一个积分功能，这需要每次都创建一个销售才能获得积分:

Note that this should also be able to work across features. eg The simple test above is defined in the sales feature. But I would also have a credits feature, and that would require creating a sale each time in order to be able to credit it:

Given I want to credit a sale
And I run the create sales order test
And I complete the the sale
And I click the credit button
Then the sale is credited

推荐答案

如前所述，您可以为此使用背景(这可能是大多数情况下的最佳选择)，但您也可以创建一个调用另一个的步骤步骤.

As noted already you can use a background for this (and that's probably the best option in most situations), but you can also create a step which calls the other steps.

[Binding]
public class MySteps: Steps //Inheriting this base class is vital or the methods used below won't be available
{
    [Given("I have created an order")]
    public void CreateOrder()
    {
         Given("I want to create a sales order");
         Given("I open the sales order page");
         Given("I click the add new order button");
         Then("a new sales order is created");
    }
}

然后你可以在你的场景中使用它:

which you can then use in your scenario:

Scenario: I add another sale
    Given I have created an order
    When I add a sales order line
    Then the order total is updated

这样做的好处是，这个复合步骤可以在场景中的任何地方使用，而不仅仅是作为起点.如果您需要，此步骤可以在多个功能中重复使用

This has the advantage that this composite step can be used anywhere in the scenario and not just as a starting point. This step can then be reused across multiple features if you need

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