pytest-conftest.py scope

1. Directory structure

There are two way call fixture: 1. decorator @ pytest.mark.usefixtures ( "start"); 2. the method call as parameter directly in the fixture decorative use cases which enter def test_demo (self, start); 3 setting fixture. parameters autouse = True

2. Example pass fixture parameters

1. project with a global directory conftest.py

1  import pytest
 2  @ pytest.fixture ()  
 3  def start ():
 4      print ( " \ n全局conftest " )

2.test_case_demo / conftest.py 和 test_demo.py

conftest.py Code 

. 1
Import pytest 2 @ pytest.fixture () . 3 DEF START_1 (): . 4 Print ( " \ n-local test_case_demo " )
test_demo.py Code 

. 1
Import pytest

2 class Test_demo (): . 3 DEF test_demo (Self, Start, START_1): # tag code . 4 Assert . 1 ==. 1 . 5 . 6 IF the __name__ == ' __main__ ' : . 7 pytest.main ([ " -s " , " -v " , " test_demo.py " ])

operation result:

3.test_case_demo_2 / conftest.py 和 test_demo_2.py

conftest.py Code 

. 1
Import pytest 2 @ pytest.fixture () . 3 DEF start_2 (): . 4 Print ( " \ n-local test_case_demo_2 " )
test_demo_2.py Code 
. 1
Import pytest
2 class Test_demo_2 (): . 3 DEF test_demo_2 (Self, Start, START_1): # tag code . 4 Assert . 1 ==. 1 . 5 . 6 IF the __name__ == ' __main__ ' : . 7 pytest.main ([ " -s " , " test_demo_2.py " , " -v " ])

The results can be seen running, start to play a global role, start_1 under test_case_demo directory no matter what its level of operation that can only be called test_case_demo below.
test_demo_2 use cases can not be cross-module call start_1 test_case_demo under the module, so test_demo_2 use cases fail

3. decorator usefixtures

fixture有 function(默认选),class,module,session,四个级别

一.只有一个.py用例文件

 

1)定义为@pytest.fixture(scope="function")

跟目录下的conftest.py 代码
1
import pytest 2 @pytest.fixture(scope="function") 3 def start(): 4 print("\n全局conftest") 5 6 @pytest.fixture() 7 def iniv(): 8 print("\n全局iniv")
test_demo.py 代码
1 import pytest
 2 @pytest.mark.usefixtures("start")  # 因为他们级别都是function,所以先运行iniv在运行start
 3 @pytest.mark.usefixtures("iniv")   
 4 class Test_demo():
 5     def test_demo(self):   
 6         assert 1==1
 7     def test_demo_1(self):
 8         assert 1==1
 9 
10 if __name__ == '__main__':
11     pytest.main(["-s","-v","test_demo.py"])

运行结果:start和iniv两个fixture都打印了

2)定义为@pytest.fixture(scope="class") 

1 #跟目录下的conftest.py 代码
2 import pytest
3 @pytest.fixture(scope="class")     #这个是装饰类
4 def start():
5     print("\n我是一个装饰class的start")
6 
7 @pytest.fixture(scope="function")   #这个是装饰用例
8 def iniv():
9     print("\n我是一个装饰function的iniv")
 1 import pytest
 2 @pytest.mark.usefixtures("start")
 3 @pytest.mark.usefixtures("iniv")
 4 class Test_demo():
 5     def test_demo(self):
 6         assert 1==1
 7     def test_demo_1(self):
 8         assert 1==1
 9 
10 if __name__ == '__main__':
11     pytest.main(["-s","-v","test_demo.py"])

运行结果:他会先运行start的在运行iniv的。因为start只是作用于class级别,而iniv是作用于function级别,所以start只需要执行一次,而iniv会有多少用例就运行多少次

 3)定义为@pytest.fixture(scope="module") 

1 #跟目录下的conftest.py 代码
2 import pytest
3 @pytest.fixture(scope="module")
4 def start():
5     print("\n我是一个装饰module的start")
6 
7 @pytest.fixture(scope="function")
8 def iniv():
9     print("\n我是一个装饰function的iniv")
 1 #test_demo.py代码
 2 import pytest
 3 @pytest.mark.usefixtures("start")
 4 @pytest.mark.usefixtures("iniv")
 5 class Test_demo():
 6     def test_demo(self):
 7         assert 1==1
 8     def test_demo_1(self):
 9         assert 1==1
10 @pytest.mark.usefixtures("start") 11 @pytest.mark.usefixtures("iniv") 12 class Test_demo_1(): 13 def test_demo(self): 14 assert 1==1 15 def test_demo_1(self): 16 assert 1==1 17 18 if __name__ == '__main__': 19 pytest.main(["-s","-v","test_demo.py"])

运行结果:他会先运行start的在运行iniv的。因为start只是作用于module级别,而iniv是作用于function级别,虽然我们在test_demo.py里面装饰了两次start,但是因为它是装饰模块的,并且也只有test_demo.py这个一个模块,所以start只需要执行一次,而iniv会有多少用例就运行多少次

 4)定义为@pytest.fixture(scope="session")

1 #跟目录下的conftest.py 代码
2 import pytest
3 @pytest.fixture(scope="session",autouse=True)  #居然你是会话级别了,那么直接默认autouse=True就行了,不用调用就自动执行
4 def start():
5     print("\n我是一个装饰session的start")
6 
7 @pytest.fixture(scope="function")
8 def iniv():
9     print("\n我是一个装饰function的iniv")
 1 #test_demo.py代码
 2 import pytest
 3 @pytest.mark.usefixtures("iniv")
 4 class Test_demo():
 5     def test_demo(self):
 6         assert 1==1
 7     def test_demo_1(self):
 8         assert 1==1
 9 
10 if __name__ == '__main__':
11     pytest.main(["-s","-v","test_demo.py"])

运行结果:他会先运行start的在运行iniv的。因为start只是作用于session级别,而iniv是作用于function级别,而且我们直接autouse=True,所以不用调用也会执行,而且start只需要执行一次,而iniv会有多少用例就运行多少次

 

二.多个.py用例文件(这里不展示代码,自己去实践吧)

多个.py用例文件,其实运行结果:

1)function级别:有多少用例就运行多少次。

2)class级别:装饰多少个类上面的,那么一个就运行多少次,例如一个.py用例里面有两个类,都装饰了class级别的,那么就运行两次,如果有两个.py用例文件都有两个类,都装饰了class级别,那么就运行四次。

3)module级别:如果有一个.py用例文件,那么就运行一次module级别,如果有两个.py用例文件,那么就运行两次。

4)session级别:不管有多少个.py用例文件,始终就运行一次

3.设置autouse=True  (这种不建议,因为你不调用它,它始终就会运行)

fixture默认autouse=False 

 
 
跟目录下的conftest.py 代码
1 import pytest
2 @pytest.fixture(autouse=True)   #启用
3 def start():
4     print("\n全局conftest")
5 
6 @pytest.fixture(autouse=False)  #不启用
7 def iniv():
8     print("\n全局iniv")
1 import pytest
2 #@pytest.mark.usefixtures("start")   这里注释掉了
3 class Test_demo():
4     def test_demo(self):
5         assert 1==1
6     def test_demo_1(self):
7         assert 1==1
8 if __name__ == '__main__':
9     pytest.main(["-s","-v","test_demo.py"])

运行结果:结果还是调用了start

 

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Origin www.cnblogs.com/hao2018/p/11351125.html