scope有4个作用范围：function、class、module、session
function：每个函数或方法都会调用
class：每个类只调用1次
module：每个模块只调用1次
session：多个模块调用1次，通常写在conftest中
scope=function
import pytest
"""
scope=function
执行顺序：setup_module ->fixture->test ->fixture->test ..
"""
@pytest.fixture()
def login():
print('登陆')
@pytest.fixture(scope='function')
def logout():
print('登出')
def setup_module():
print(f'setup')
def test_s1(login):
print('s1')
def test_s2(logout):
print('s2')
def test_s3():
print('s3')
if __name__ == '__main__':
pytest.main(['-q','s001_function.py'])运行结果：
collecting ... collected 3 items
s001_function.py::test_s1 setup
登陆
PASSED [ 33%]s1
s001_function.py::test_s2 登出
PASSED [ 66%]s2
s001_function.py::test_s3 PASSED [100%]s3scope=function使用在类中
import pytest
"""
scope=fuction
运行顺序：setup_method -> fixture -> test -> setup_method -> fixture -> test
"""
@pytest.fixture()
def login():
print('登陆')
@pytest.fixture(scope='function')
def logout():
print('登出')
class Test1:
def setup_method(self):
print('setup_method')
def test_s1(self,login):
print('s1')
def test_s2(self,logout):
print('s2')
if __name__ == '__main__':
pytest.main(['-q','s002_function_运用在class中.py'])运行结果：
collecting ... collected 2 items
s002_function_运用在class中.py::Test1::test_s1 setup_method
登陆
PASSED [ 50%]s1
s002_function_运用在class中.py::Test1::test_s2 setup_method
登出
PASSED [100%]s2
============================== 2 passed in 0.20s ==============================scope=class
import pytest
"""
scope=class
1、若class中的每个test用例都调用了login，只在class所有用例执行前运行一次
2、运行顺序
setup_class -> fixture函数（整个类的运行过程中只运行一次，测试用例执行前）-> 测试用例
"""
@pytest.fixture(scope='class')
def login():
print('登陆')
class Test2:
def setup_class(self):
print('setup')
def test_s1(self,login):
print('s1')
def test_s2(self,login):
print('s2')
def test_s3(self):
print('s3')
if __name__ == '__main__':
pytest.main(['-q','s003_class.py'])运行结果：
collecting ... collected 3 items
s003_class.py::Test2::test_s1 setup
登陆
PASSED [ 33%]s1
s003_class.py::Test2::test_s2 PASSED [ 66%]s2
s003_class.py::Test2::test_s3 PASSED [100%]s3
============================== 3 passed in 0.22s ==============================scope=module
import pytest
"""
scope=module：整个.py模块中login只执行一次
执行顺序：setup_module -> fixture -> tests
"""
@pytest.fixture(scope='module')
def login():
print('登陆')
def setup_module():
print('setup_module')
def test_s1(login):
print('s1')
class Test1:
def test_s2(self,login):
print('s2')
if __name__ == '__main__':
pytest.main(['-q', 's004_module.py'])运行结果：
collecting ... collected 2 items
s004_module.py::test_s1 setup_module
登陆
PASSED [ 50%]s1
s004_module.py::Test1::test_s2 PASSED [100%]s2
============================== 2 passed in 0.19s ==============================scope=session
scope=session，可以跨多个.py文件，若多个py模块中的用例都调用了 fixture，只会运行一次（在调用fixture的用例开始时运行一次）
fixture(scope='session') 函数写在 conftest.py 文件中
conftest.py 文件文件名固定，放在工程根目录则是全局使用，放在某个package下，则只针对该package下的py文件有效
conftest.py
import pytest
@pytest.fixture(scope='session')
def gblogin():
print('gb登陆--session')如上，test_001 和 test_005中分别调用了gblogin
test_001
import pytest
@pytest.fixture()
def login():
print('登陆')
@pytest.fixture(scope='function')
def logout():
print('登出')
def setup_module():
print(f'setup')
def test_s1(login):
print('s1')
def test_s2(logout):
print('s2')
def test_s3(gblogin):
print('s3')test_005
import pytest
def test1(gblogin):
print('s1')执行所有用例：
E:\f004_fixtrue\f02_scope>pytest -s运行结果：
collected 11 items
test_001_function.py setup
登陆
s1
.登出
s2
.gb登陆--session
s3
.
test_002_function_运用在class中.py setup_method
登陆
s1
.setup_method
登出
s2
.
test_003_class.py setup
登陆
s1
.s2
.s3
.
test_004_module.py setup_module
登陆
s1
.s2
.
test_005_session.py s1
.
================================================= 11 passed in 0.53s ==================================================