在RSpec中是否有对应于Cucumber的“Scenarios”的等价物。还是我用RSpec的方式错了？ [英] Is there an equivalent in RSpec to Cucumber's "Scenarios" or am I using RSpec the wrong way?

问题描述

我对黄瓜方案的简洁性和有用性印象深刻，它们是测试不同案例的负载的好方法。

I'm impressed at the brevity and usefulness of Cucumber's Scenarios, they're a great way to test a load of different cases.

例如。 示例黄瓜方案

e.g. example Cucumber scenario

Feature: Manage Users
In order to manage user details
As a security enthusiast
I want to edit user profiles only when authorized

Scenario Outline: Show or hide edit profile link
  Given the following user records
    | username | password | admin |
    | bob      | secret   | false |
    | admin    | secret   | true  |
  Given I am logged in as "<login>" with password "secret"
  When I visit profile for "<profile>"
  Then I should <action>

  Examples:
    | login | profile | action                 |
    | admin | bob     | see "Edit Profile"     |
    | bob   | bob     | see "Edit Profile"     |
    |       | bob     | not see "Edit Profile" |
    | bob   | admin   | not see "Edit Profile" |

（代码取自 Ryan Bates的更多关于黄瓜屏幕录像）

RSpec有等效吗？ / strong>

Is there an equivalent in RSpec?

我想在RSpec中做同样的事情，并通过在方案表中将不同的测试降低到一行来干掉我的代码。

I'd like to do the same thing in RSpec and to DRY up my code by reducing different tests down to a row in a scenario table.

虽然我可以自己编写代码来做这件事，但我考虑它的事实让我想到两件事：

Although I could write the code to do this myself, the fact that I'm considering it makes me wonder two things

1. 如果这很有用，它可能已经存在，如何使用它？

1. If this is useful it probably already exists in which case how do I use it?

它不存在，它建议它不应该这样做，并且我接近的问题不正确，我应该如何重新思考我的方法RSpec？

If it doesn't exist it suggests it shouldn't be done this way and that I'm approaching the problem incorrectly, how should I rethink my approach to RSpec?

哪个答案是正确的，如果它是有用的，我该怎么办？

Which answer is right and if it is useful, how do I do it?

推荐答案

p>尝试以下方法。我喜欢它的结果。

Try the following approach. I like the way it turned out.

describe StateDateMethods do
  before :each do
    @product = OpenStruct.new
    @product.extend StateDateMethods
  end

  def parse_date(unparsed_date_value)
    unless unparsed_date_value.nil?
      DateTime.strptime(unparsed_date_value, '%m/%d/%Y')
    end
  end

  context '#pre_order?' do
    examples = [
      # [visible_on, pre_order_on, for_sale_on] => method_result
      { :inputs => [nil, nil, nil], :expected => false },
      { :inputs => ['1/1/2001', nil, nil], :expected => false },
      { :inputs => ['1/1/2001', '1/1/2001', nil], :expected => true },
      { :inputs => ['1/1/2001', '1/2/2001', nil], :expected => true },
      { :inputs => ['1/1/2001', '1/1/2001', '1/2/2001'], :expected => false },
      { :inputs => ['1/1/2001', '1/1/2001', '1/1/3001'], :expected => true },
      { :inputs => ['1/1/2001', '1/1/3001', '1/2/3001'], :expected => false },
      { :inputs => ['1/1/3001', '1/1/3001', '1/2/3001'], :expected => false },
      { :inputs => ['1/1/2001', nil, '1/1/2001'], :expected => false },
      { :inputs => ['1/1/2001', nil, '1/1/3001'], :expected => false }
    ]
    examples.each do |example|
      inputs = example[:inputs]

      it "should return #{example[:expected].inspect} when visible_on == #{inputs[0].inspect}, pre_order_on == #{inputs[1].inspect}, for_sale_on == #{inputs[2].inspect}" do
        @product.visible_on = parse_date(inputs[0])
        @product.pre_order_on = parse_date(inputs[1])
        @product.for_sale_on = parse_date(inputs[2])

        @product.pre_order?.should == example[:expected]
      end
    end
  end
end

两个世界，因为它让我不再重复自己，并为每个条件创建一个不同的测试。

I think this gives the best of both worlds, because it keeps me from repeating myself, and it creates a different test for each condition.

这是失败的样子：

....F.....

Failures:

  1) StateDateMethods#pre_order? should return false when visible_on == "1/1/2001", pre_order_on == "1/1/2001", for_sale_on == "1/2/2001"
     Failure/Error: @product.pre_order?.should == example[:expected]
       expected: false
            got: true (using ==)
     # ./spec_no_rails/state_date_methods_spec.rb:40:in `block (4 levels) in <top (required)>'

Finished in 0.38933 seconds
10 examples, 1 failure

Failed examples:

rspec ./spec_no_rails/state_date_methods_spec.rb:35 # StateDateMethods#pre_order? should return false when visible_on == "1/1/2001", pre_order_on == "1/1/2001", for_sale_on == "1/2/2001"

以下是所有绿色的样子：

And here's what all green looks like:

..........

Finished in 0.3889 seconds
10 examples, 0 failures

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