黃瓜可選參數

Question

我有一個步驟定義，我希望有一個可選參數。我相信這個步驟的兩個呼叫的例子比任何其他事物都更好地解釋我所追求的。

I check the favorite color count 
I check the favorite color count for email address 'john@anywhere.com' 

在第一個例子中，我想使用默認的電子郵件地址。

定義這一步的好方法是什麼？我不是正則表達式大師。我試圖這樣做，但黃瓜給了我一個錯誤關於正則表達式的參數不匹配：

Then(/^I check the favorite color count (for email address "([^"]*))*"$/) do |email = "default_email@somewhere.com"| 

Answer 1

optional.feature：

Feature: Optional parameter 

    Scenario: Use optional parameter 
    When I check the favorite color count 
    When I check the favorite color count for email address 'john@anywhere.com' 

optional_steps.rb

When /^I check the favorite color count(?: for email address (.*))?$/ do |email| 
    email ||= "default@domain.com" 
    puts 'using ' + email 
end 

輸出

Feature: Optional parameter 

    Scenario: Use optional parameter 
    When I check the favorite color count 
     using default@domain.com 
    When I check the favorite color count for email address 'john@anywhere.com' 
     using 'john@anywhere.com' 

1 scenario (1 passed) 
2 steps (2 passed) 
0m0.047s 

Answer 2

@larryq，你更願意Ë更接近比你想象的解決方案...

optional.feature：

Feature: optional parameter 

Scenario: Parameter is not given 
    Given xyz 
    When I check the favorite color count 
    Then foo 

Scenario: Parameter is given 
    Given xyz 
    When I check the favorite color count for email address 'john@anywhere.com' 
    Then foo 

optional_steps.rb

When /^I check the favorite color count(for email address \'(.*)\'|)$/ do |_, email| 
    puts "using '#{email}'" 
end 

Given /^xyz$/ do 
end 

Then /^foo$/ do 
end 

輸出：

Feature: optional parameter 

Scenario: Parameter is not given 
    Given xyz 
    When I check the favorite color count 
     using '' 
    Then foo 

Scenario: Parameter is given 
    Given xyz                 
    When I check the favorite color count for email address 'john@anywhere.com' 
     using 'john@anywhere.com' 
    Then foo                  

2 scenarios (2 passed) 
6 steps (6 passed) 
0m9.733s