Pytest fixture decorator

fixture Decorator 5 The meanings of the parameters are explained in detail

@pytest.fixture(scope='',autouse='',params="",ids="",name="")

scope ：

function Function level Every function or method calls
class Class level Each test class runs only once
module Module level every last .py File call once
session Session level You only need to run once per session , All methods and classes in the session , Modules share this method

autouse :

Automatic execution , Default False, Set to True All use cases included in the later set execution level will execute this method

params:

A parameterized

ids：

When parameterizing, set the variable name for each value

name：

Alias the marked method

scope Parameters use

Code

@pytest.fixture(scope='function')
def my_fixture():
    print(" Prepositive method ")
    # By default, there is only front , Post setting required yield Division 
    yield
    print(' The rear method ')

class TestFrontBack:

    def test_login(self):
        print(' Click login ')
        print(' Enter account ')
        print(' Input password ')
        print(' Click login ')
    def test_buy(self,my_fixture):
        print(' Enter the account and password in the login interface ')
        print(' Click login ')
        print(' View items and add them to the shopping cart ')
        print(' Shopping cart purchase payment goods ')
        print(' Check the account balance ')

（function） Method level use

If you want to 2 Both methods execute the pre and post values , You can add (self,my_fixture), But more is troublesome

Use autouse Automatic execution , Before and after values of all method level use cases

（class） Class level uses

（module） Module level （ One py file ） Do not use

The code adds a class for testing

@pytest.fixture(scope='module',autouse=True)
def my_fixture():
    print(" Prepositive method ")
    # By default, there is only front , Post setting required yield Division 
    yield
    print(' The rear method ')

class TestFixture:

    def test_login(self):
        print(' Click login ')
        print(' Enter account ')
        print(' Input password ')
        print(' Click login ')
    def test_buy(self):
        print(' Enter the account and password in the login interface ')
        print(' Click login ')
        print(' View items and add them to the shopping cart ')
        print(' Shopping cart purchase payment goods ')
        print(' Check the account balance ')


class TestFixture2:
    def test(self):
        print(" test module Level execution , That's one py The file is only executed once ")

Execution results

params A parameterized

Code

@pytest.fixture(scope='function',params=['1234','123477','1234785'])
 Fixed writing 
def my_fixture(request):
    return request.param

class TestFixture:

    def test_login(self,my_fixture):
        print(' Click login ')
        print(' Enter account ')
        print(' Input password '+str(my_fixture))
        print(' Click login ')

Execution results

Parameterization is used with pre and post

Use yield Instead of return Use the return parameter

ids Parameters ： Give the parameter a variable name

name Parameters to fixture Alias the marked method

Be careful ： After taking the alias , Can't find with your real name fixture Method of marking