pytest如何使用debug模式

 

pytest初始化的类别和作用域

• 模块级别（Module level setup/teardown）：作用于一个模块内的所有class和def，对于所有class和def，setup和teardown只执行一次

def setup\_module(module):  
  
"""   
  
setup any state specific to the   
execution of the given module.  
  
"""  
  
def teardown\_module(module):  
  
"""   
teardown any state that was previously   
setup with a setup\_module
method.
"""

• 类级别（Class level setup/teardown）：作用于一个class内中的所有test,所有用例只执行一次setup，当所有用例执行完成后，才会执行teardown

@classmethod  
def setup\_class(cls):  
  
""" setup any state specific to the execution   
of the given class (which
usually contains tests).
"""  
  
  
@classmethod  
def teardown\_class(cls):
 """ teardown any state that was previously   
setup with a call to
setup\_class.
"""

• 方法和函数级别（Method and function level setup/teardown）：作用于单个测试用例，若用例没有执行（如被skip了）或失败了，则不会执行teardown

def setup\_method(self, method):  
  
"""   
setup any state tied to the execution   
of the given method in a
class. setup\_method is invoked for   
every test method of a class.
"""  
  
  
def teardown\_method(self, method):  
  
"""  
teardown any state that was   
previously setup with a setup\_method
call.
"""

若用例直接写在模块中，而不是在类中，则用：

def setup\_function(function):  
  
"""   
setup any state tied to the execution of the given function.
Invoked for every test function in the module.
"""  
  
def teardown\_function(function):  
  
"""   
teardown any state that was previously setup with  
 a setup\_function call.
"""

• pytest.fixture()装饰函数，结合yield实现初始化和teardown
  举个例子(pytest）文档中的：

import smtplib  
import pytest  
@pytest.fixture(scope="module")def smtp():
    smtp = smtplib.SMTP("smtp.gmail.com", 587, timeout=5)
      
    yield smtp # provide the fixture value
    print("teardown smtp")  
  

    smtp.close()

运行结果：

$ pytest -s -q --tb=no
FFteardown smtp2 failed in 0.12 seconds

pytest用例初始化操作的示例

为了体现初始化和环境恢复，本节演示采用邮件发送的脚本，可查看邮件发送的脚本：python发送邮件脚本或者参考文章：SMTP发送邮件。

1、setup_method(self, method)

• 在test_method.py中构建了3个测试用例，每个用例在执行前后都会执行setup_method/teardown_method连接smtp和断开smtp。

• 查看结果，采用pytest -s -q 运行，-s 可以查看打印信息，-q减少输出信息：

test_method结果.png
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