Behave / python3:测试未定义，即使存在阶跃函数

Question

我已经开始使用behaviour在Python3上定义行为驱动的测试。第一次测试进行得很顺利，但现在我遇到了一个最令人费解的错误。

我已经定义了这个小黄瓜文件sra-to-isatab-batch-conversion.feature

Feature: SRA to ISA-tab Batch conversion
# perform a batch conversion of a set of SRA datasets, retrieved from the European Nucleotide Archive
# to ISA-tab

Scenario: Batch conversion form a list of SRA accession numbers
 Given An access number "ERA000084"
 And nothing else
 When the SRA to ISA tab conversion is invoked
 Then it should return a ZIP file object
 And the ZIP file should contain as many directories as the element in the list

然后，我在文件steps/sra-to-isatab-batch-conversion.py中定义了以下步骤方法

from behave import *

use_step_matcher("parse")


@given('An access number "{access_number}"')
def step_impl(context, access_number):
    context.access_number = access_number
    print(context.access_number)

@step("nothing else")
def step_impl(context):
    print("Nothing else") 


@when("the SRA to ISA tab conversion is invoked")
def step_impl(context):
 pass


@then("it should return a ZIP file object")
def step_impl(context):
    pass


@step("the ZIP file should contain as many directories as the element in the list")
def step_impl(context):
    pass

如果我随后运行behave sra-to-isatab-conversion.feature，则与when步骤相关的步骤函数似乎丢失：

Feature: SRA to ISA-tab Batch conversion # sra-to-isatab-batch-conversion.feature:2

Scenario: Batch conversion form a list of SRA accession numbers                  # sra-to-isatab-batch-conversion.feature:6
Given An access number "ERA000084"                                             # steps/sra-to-isatab-batch-conversion.py:6 0.000s
And nothing else                                                               # steps/sra-to-isatab-batch-conversion.py:40 0.000s
When the SRA to ISA tab conversion is invoked                                  # None
Then it should return a ZIP file object                                        # None
And the ZIP file should contain as many directories as the element in the list # None

/Users/massi/Projects/oerc/isa-api/features/test_outputs

Failing scenarios:
  sra-to-isatab-batch-conversion.feature:6  Batch conversion form a list of SRA accession numbers

0 features passed, 1 failed, 0 skipped
0 scenarios passed, 1 failed, 0 skipped
2 steps passed, 0 failed, 2 skipped, 1 undefined
Took 0m0.001s

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

@when(u'the SRA to ISA tab conversion is invoked')
def step_impl(context):
    raise NotImplementedError(u'STEP: When the SRA to ISA tab conversion is invoked')`

我尝试重新定义步骤描述更改给定语句的数量，我甚至重写了文件，但我总是得到相同的错误。即使我复制了错误消息中建议的语句，我仍然得到完全相同的错误。

谁能给我解释一下我做错了什么？我使用的是Python3.4behavior 1.2.5 PyCharm 5.0.4 (请注意，PyCharm BDD工具可以识别小黄瓜文件中语句和步骤函数之间的匹配)

Answer 1

嗯，就像你在上面粘贴的那样，它目前对我来说工作得很好。可能是环境问题或安装问题。你能尝试重新安装behave吗？另外，你是在你的终端上还是在pycharm上运行它？

PS:没问题，但是如果您使用的是parse，就不需要指定use_step_matcher()方法；因为它是默认的step_matcher

另外(确保不是你的粘贴人为错误)：你的@when步骤方法在"pass“语句上有一个缩进问题。在你的代码中真的是这样吗?或者只是论坛里的一个格式问题？