行为步骤消歧/可选步骤参数

Question

我正在尝试支持以下功能场景：Feature: test  Scenario: Test optional      Given attacked by samurai        And attacked by samurai from behind我的步骤文件是from behave import step@step('attacked by {opponent}')def step_attacked_by(context, opponent):    print(opponent)@step('attacked by {opponent} from {direction}')def step_attacked_by(context, opponent, direction):    print(opponent)    print(direction)我收到错误：behave.step_registry.AmbiguousStep: @step('attacked by {opponent} from {direction}') has already been defined in  existing step @step('attacked by {opponent}') at steps/test.py:5然后我尝试使用可选参数：我的功能文件：Feature: test  Scenario: Test optional      Given attacked by a samurai我的步骤文件：import parsefrom behave import step, [e-mail]_pattern(r"a\s+")def parse_word_a(text):    """Type converter for "a " (followed by one/more spaces)."""    return text.strip()register_type(a_=parse_word_a)@step('attacked by {:a_?}{opponent}')def step_attacked_by(context, a_, opponent):    print(a_)    print(opponent)我收到此错误：    raise ValueError('format spec %r not recognised' % type)ValueError: format spec 'a_?' not recognised我认为我真的不需要一个可选参数，只要我可以消除第一个示例中的步骤的歧义即可。

Answer 1

在使用 Behave 时，我注意到在步骤定义文件中定义步骤的顺序很重要。

尝试首先从最具体的步骤开始定义您的步骤：

@step('attacked by {opponent} from {direction}')

def step_attacked_by(context, opponent, direction):

    print(opponent)

    print(direction)

@step('attacked by {opponent}')

def step_attacked_by(context, opponent):

    print(opponent)

运行你的 test.feature 不会再给我带来歧义错误。