尝试使用示例运行生菜场景时，我创建的步骤无法被识别

Question

让我看看能不能告诉你我有多困惑。

如果我只使用内联变量的生菜特征文件，一切正常。例如，如果我创建以下功能文件：

Feature: File Finder
    I need to just look for the presence of certain files on a system

Scenario Outline:  Verify the presence (or absence) of a file on a system
    Given I log into a system at "172.16.100.23" as user "cadmin" with password "cadmin"
    Then I can look for "/var/log/nginx.log" and know that it should "not" be there

然后运行生菜，它告诉我创建以下步骤：

You can implement step definitions for undefined steps with these snippets:

# -*- coding: utf-8 -*-
from lettuce import step

@step(u'Given I log into a system at "([^"]*)" as user "([^"]*)" with password "([^"]*)"')
def given_i_log_into_a_system_at_group1_as_user_group2_with_password_group2(step, group1, group2, group3):
    assert False, 'This step must be implemented'
@step(u'Then I can look for "([^"]*)" and know that it should "([^"]*)" be there')
def then_i_can_look_for_group1_and_know_that_it_should_group2_be_there(step, group1, group2):
    assert False, 'This step must be implemented'

如果我将该标题（“从生菜导入步骤”）和这些步骤粘贴到 filefinder.py 文件夹中，并将“assert False”更改为“assert True”以使测试通过，我将顺利通过：

Feature: File Finder
  I need to just look for the presence of certain files on a system

Scenario: Verify the presence (or absence) of a file on a system
  Given I log into a system at "172.16.100.23" as user "cadmin" with password "cadmin"
  Then I can look for "/var/log/nginx.log" and know that it should "not" be there

1 feature (1 passed)
1 scenario (1 passed)
2 steps (2 passed)

现在，我想添加一个示例表。我所做的只是添加Then I can ask <manager> for <item> 作为我的第三步和以下示例表：

Examples:
    | manager   | item            |
    | "bob"     | "raise"         |
    | "suzy"    | "more switches" |
    | "bill"    | "more coffee"   |

当我针对这个运行生菜时，它告诉我：

You can implement step definitions for undefined steps with these snippets:

# -*- coding: utf-8 -*-
from lettuce import step

@step(u'Then I can ask <manager> for <item>')
def then_i_can_ask_manager_for_item(step):
    assert False, 'This step must be implemented'

所以，我将它添加到我的 filefinder.py 文件中，并将“assert False”更改为“assert True”，只是为了让它通过并在我的控制台上看到绿色。如果我对此运行生菜，它会给我完全相同的响应，就好像它无法将占位符 <manager> 和 <item> 识别为创建有效步骤一样，我猜。这是我唯一一次无法创建它要求的步骤 - 当我使用此处所述的占位符时：http://lettuce.it/tutorial/scenario-outlines.html 奇怪的是，该示例显示“场景大纲：阶乘 [0-4]”，因为我可以t 判断是否需要 [0-4]。尽管我没有任何成功的示例测试，但在我的测试中似乎没有任何区别，所以我可能完全错了。

我需要做的是弄清楚为什么 lettuce 看不到那些内联有“<placeholder>”语法的步骤。

有人可以帮我解释一下吗？

Answer 1

我看到了这个页面：http://lettuce.it/intro/wtf.html 恰当地命名为 wtf！

我需要做的是在 <placeholders> 周围加上引号并删除示例表中的引号。

现在，我的功能文件如下所示：

Feature: File Finder
    I need to just look for the presence of certain files on a system

Scenario Outline:  Verify the presence of a file on a system [0-3]
    Given I log into a system at "172.16.100.23" as user "cadmin" with password "cadmin"
    Then I can look for "/var/log/nginx.log" and know that it should "not" be there
    Then I can ask "<manager>" for "<item>"

Examples:
    | manager | item          |
    | bob     | raise         |       
    | suzy    | more switches |
    | bill    | more coffee   |

它在我的控制台上以各种绿色通过：

Feature: File Finder
  I need to just look for the presence of certain files on a system

Scenario Outline: Verify the presence of a file on a system
  Given I log into a system at "172.16.100.23" as user "cadmin" with password "cadmin"
  Then I can look for "/var/log/nginx.log" and know that it should "not" be there
  Then I can ask "<manager>" for "<item>"

Examples:
  | manager | item          |
  | bob     | raise         |
  | suzy    | more switches |
  | bill    | more coffee   |

1 feature (1 passed)
3 scenarios (3 passed)
9 steps (9 passed)

要点...“[0-4]”不是必需的，在使用示例时，请确保使用“场景大纲”而不是“场景”。