44. conftest 共享fixture/后置步骤yield

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将公共前置部分放到conftest.py （一般，web测试就是将打开浏览器放到前置去做）

# conftest.py 
import pytest
from selenium import webdriver
from selenium.webdriver.common.by import By


@pytest.fixture(scope="session")
def driver():
    driver = webdriver.Chrome()
    driver.maximize_window()
    print("打开浏览器")
    return driver

# test_fixture.py
import pytest
from selenium import webdriver
from selenium.webdriver.common.by import By

class TestBaidu:

    def test_baidu(self, driver):
        driver.get("https://www.baidu.com/")
        title = driver.title
        url = driver.current_url
        text = driver.find_element(By.CSS_SELECTOR, 'a[href="http://news.baidu.com"]').text
        button_text = driver.find_element(By.ID, 'su').accessible_name
        assert title == "百度一下，你就知道"
        assert url == "https://www.baidu.com/"
        assert text == "新闻"
        assert button_text == "百度一下"

    def test_baidu1(self, driver):
        driver.get("https://www.baidu.com/")
        title = driver.title
        url = driver.current_url
        text = driver.find_element(By.CSS_SELECTOR, 'a[href="http://news.baidu.com"]').text
        button_text = driver.find_element(By.ID, 'su').accessible_name
        assert title == "百度一下，你就知道"
        assert url == "https://www.baidu.com/"
        assert text == "新闻"
        assert button_text == "百度一下"
#         后置处理

if __name__ == '__main__':
    pytest.main()

session、module、function、class级别区别

# conftest.py

import pytest
from selenium import webdriver

@pytest.fixture(scope="session")
def driver():
    driver = webdriver.Chrome()
    driver.maximize_window()
    print("打开浏览器")
    return driver

@pytest.fixture(scope="session",autouse=True)
def session():
    print("我是session级别")

@pytest.fixture(scope="module",autouse=True)
def module():
    print("我是module级别")

@pytest.fixture(scope="class",autouse=True)
def ts_classn():
    print("我是class级别")

@pytest.fixture(scope="function",autouse=True)
def function():
    print("我是function级别")

# test_one.py
class TestOne:
    def test_one(self):
        assert 1 == 1

    def test_two(self):
        assert 1 == 1

# test_two.py
class TestTwo:
    def test_one(self):
        assert 1 == 1

    def test_two(self):
        assert 1 == 1

(venv) C:\Users\xxx\PycharmProjects\spider\CH0>pytest
================================================================= test session starts =================================================================
platform win32 -- Python 3.7.6, pytest-7.4.4, pluggy-1.2.0 -- C:\Users\wesley\PycharmProjects\spider\venv\Scripts\python.exe
cachedir: .pytest_cache
rootdir: C:\Users\wesley\PycharmProjects\spider
configfile: pytest.ini
plugins: assume-2.4.3, ordering-0.6
collected 4 items                                                                                                                                      

test_one.py::TestOne::test_one 我是session级别
我是module级别
我是class级别
我是function级别
PASSED
test_one.py::TestOne::test_two 我是function级别
PASSED
test_two.py::TestTwo::test_one 我是module级别
我是class级别
我是function级别
PASSED
test_two.py::TestTwo::test_two 我是function级别
PASSED

================================================================== 4 passed in 0.02s ==================================================================

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function: 每个测试用例都会执行，但是最后执行
session:只执行一次
module:每个.py文件执行一次
class:每个类执行一次

fixture夹具，使用yield做后置(测试完成后链接数据库删除测试数据、关闭浏览器等)

@pytest.fixture(scope="session")
def driver():
    driver = webdriver.Chrome()
    driver.maximize_window()
    print("打开浏览器")
    yield driver
    driver.quit()

# conftest.py
import pytest
from selenium import webdriver

@pytest.fixture(scope="session")
def driver_project():
    global driver
    driver = webdriver.Chrome()
    driver.maximize_window()
    driver.get("http://meikefresh.5istudy.online/")
    print("打开浏览器")
    yield driver
    print("关闭浏览器")
    driver.close()
    driver.quit()


@pytest.fixture(autouse=True)
def fixture():
    print("我是前置步骤")
    yield
    print("我是后置步骤")

return: 后面的代码就不会被执行
yield：其后面的代码会被执行