playwright结合pytest使用
安装配置环境
PS D:\Programs\Python\com.davieyang.demo> pip install pytest-playwright
Collecting pytest-playwright
Downloading pytest_playwright-0.3.0-py3-none-any.whl (10 kB)
Requirement already satisfied: pytest in c:\program files\python37\lib\site-packages (from pytest-playwright)(7.1.2)
Collecting pytest-base-url
Downloading pytest_base_url-2.0.0-py3-none-any.whl (4.6 kB)
Requirement already satisfied: playwright>=1.18in c:\program files\python37\lib\site-packages (from pytest-playwright)(1.22.0)
Collecting python-slugify
Downloading python_slugify-6.1.2-py2.py3-none-any.whl (9.4 kB)
Requirement already satisfied: greenlet==1.1.2 in c:\program files\python37\lib\site-packages (from playwright>=1.18->pytest-playwright)(1.1.2)
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Collecting text-unidecode>=1.3
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Installing collected packages: text-unidecode, python-slugify, pytest-base-url, pytest-playwright
Successfully installed pytest-base-url-2.0.0 pytest-playwright-0.3.0 python-slugify-6.1.2 text-unidecode-1.3
命令行运行
创建一个Py文件，并在文件中写入如下代码
# test_my_application.pydeftest_example_is_working(page):
page.goto("https://example.com")assert page.inner_text('h1')=='Example Domain'
page.click("text=More information")
在命令行中执行：
# Run tests (Chromium and headless by default)
pytest
# Run tests in headed mode
pytest --headed# Run tests in a different browser (chromium, firefox, webkit)
pytest --browser firefox
# Run tests in multiple browsers
pytest --browser chromium --browser webkit
命令行参数介绍
–headed: Run tests in headed mode (default: headless).
–browser: Run tests in a different browser chromium, firefox, or webkit. It can be specified multiple times (default: all browsers).
–browser-channel Browser channel to be used.
–slowmo Run tests with slow mo.
–device Device to be emulated.
–output Directory for artifacts produced by tests (default: test-results).
–tracing Whether to record a trace for each test. on, off, or retain-on-failure (default: off).
–video Whether to record video for each test. on, off, or retain-on-failure (default: off).
–screenshot Whether to automatically capture a screenshot after each test. on, off, or only-on-failure (default: off).
Slow 模式运行
创建一个Py文件，命名为
PlaywrightPytest.py
，在文件中写入如下代码
from playwright.sync_api import Page
deftest_visit_admin_dashboard(page: Page):
page.goto("http://www.baidu.com")
命令行执行代码：
PS D:\Programs\Python\com.davieyang.demo\PlayWright> pytest .\PlaywrightPytest.py --slowmo100=======================================test session starts ================================================
platform win32 -- Python 3.7.9, pytest-7.1.2, pluggy-1.0.0
rootdir: D:\Programs\Python\com.davieyang.demo\PlayWright
plugins: base-url-2.0.0, html-3.1.1, metadata-2.0.1, playwright-0.3.0
collected 1 item
PlaywrightPytest.py .[100%]====================================1 passed in2.66s ====================================================
跳过测试用例
# test_my_application.pyimport pytest
@pytest.mark.skip_browser("firefox")deftest_visit_example(page):
page.goto("https://example.com")# ...
指定特殊浏览器执行
代码中指定
# conftest.pyimport pytest
@pytest.mark.only_browser("chromium")deftest_visit_example(page):
page.goto("https://example.com")# ...
命令行指定
PS D:\Programs\Python\com.davieyang.demo\PlayWright> pytest .\PlaywrightPytest.py --browser-channel chrome
=================================test session starts =======================================================
platform win32 -- Python 3.7.9, pytest-7.1.2, pluggy-1.0.0
rootdir: D:\Programs\Python\com.davieyang.demo\PlayWright
plugins: base-url-2.0.0, html-3.1.1, metadata-2.0.1, playwright-0.3.0
collected 1 item
PlaywrightPytest.py .[100%]===========================================1 passed in1.96s ============================================
定义base-url
创建Py文件，并写入如下代码
from playwright.sync_api import Page
deftest_visit_admin_dashboard(page: Page):
page.goto("category_9732604")
在命令行执行命令
PS D:\Programs\Python\com.davieyang.demo\PlayWright> pytest .\PlaywrightPytest.py --browser-channel chrome --base-url https://blog.csdn.net/dawei_yang000000
=============================test session starts ======================================
platform win32 -- Python 3.7.9, pytest-7.1.2, pluggy-1.0.0
baseurl: https://blog.csdn.net/dawei_yang000000
rootdir: D:\Programs\Python\com.davieyang.demo\PlayWright
plugins: base-url-2.0.0, html-3.1.1, metadata-2.0.1, playwright-0.3.0
collected 1 item
PlaywrightPytest.py .[100%]=================================1 passed in2.31s =====================================
忽略HTTPS错误
# conftest.pyimport pytest
@pytest.fixture(scope="session")defbrowser_context_args(browser_context_args):return{**browser_context_args,"ignore_https_errors":True}
自定义分辨率
# conftest.pyimport pytest
@pytest.fixture(scope="session")defbrowser_context_args(browser_context_args):return{**browser_context_args,"viewport":{"width":1920,"height":1080,}}
设备模拟
# conftest.pyimport pytest
@pytest.fixture(scope="session")defbrowser_context_args(browser_context_args, playwright):
iphone_11 = playwright.devices['iPhone 11 Pro']return{**browser_context_args,**iphone_11,}
也可以在命令行执行加上参数
--device="iPhone 11 Pro"
持久化环境
# conftest.pyimport pytest
from playwright.sync_api import BrowserType
from typing import Dict
@pytest.fixture(scope="session")defcontext(
browser_type: BrowserType,
browser_type_launch_args: Dict,
browser_context_args: Dict
):
context = browser_type.launch_persistent_context("./foobar",**{**browser_type_launch_args,**browser_context_args,"locale":"de-DE",})yield context
context.close()
结合Unittest单元测试框架执行用例
import pytest
import unittest
from playwright.sync_api import Page
classMyTest(unittest.TestCase):@pytest.fixture(autouse=True)defsetup(self, page: Page):
self.page = page
deftest_foobar(self):
self.page.goto("https://microsoft.com")
self.page.click("#foobar")assert self.page.evaluate("1 + 1")==2
Pytest执行unittest用例
unittest 是构建在python标准库的单元测试框架，原本是用于测试python自己的，后来也常用于各类项目或者产品的单元测试及自动化测试，而pytest可以像unittest一样运行，并且可以在同一个会话中同时运行pytest用例和unittest用例。
仍旧以Task项目作为被测内容，如下代码是unittest框架下的用例
import unittest
import shutil
import tempfile
import tasks
from tasks import Task
defsetUpModule():"""Make temp dir, initialize DB."""global temp_dir
temp_dir = tempfile.mkdtemp()
tasks.start_tasks_db(str(temp_dir),'tiny')deftearDownModule():"""Clean up DB, remove temp dir."""
tasks.stop_tasks_db()
shutil.rmtree(temp_dir)classTestNonEmpty(unittest.TestCase):defsetUp(self):
tasks.delete_all()# start empty# add a few items, saving ids
self.ids =[]
self.ids.append(tasks.add(Task('One','Brian',True)))
self.ids.append(tasks.add(Task('Two','Still Brian',False)))
self.ids.append(tasks.add(Task('Three','Not Brian',False)))deftest_delete_decreases_count(self):# GIVEN 3 items
self.assertEqual(tasks.count(),3)# WHEN we delete one
tasks.delete(self.ids[0])# THEN count decreases by 1
self.assertEqual(tasks.count(),2)
用pytest执行这段unittest框架下的用例：
DY@MacBook-Pro unittest$pytest -v test_delete_unittest.py
======================= test session starts ============================
platform darwin -- Python 3.6.5, pytest-5.1.2, py-1.8.0, pluggy-0.13.0--/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6
cachedir:.pytest_cache
rootdir:/Volumes/Extended/PythonPrograms/Pytest/SourceCode/ch7/unittest
collected 1 item
test_delete_unittest.py::TestNonEmpty::test_delete_decreases_count PASSED [100%]=========================1 passed in0.08s ==========================
使用unittest执行这段用例：
DY@MacBook-Pro unittest$python3 -m unittest -v test_delete_unittest.py
test_delete_decreases_count (test_delete_unittest.TestNonEmpty)... ok
----------------------------------------------------------------------
Ran 1 test in0.019s
OK
再有一个pytest用例，如下代码所示：
import tasks
deftest_delete_decreases_count(db_with_3_tasks):
ids =[t.idfor t in tasks.list_tasks()]# GIVEN 3 itemsassert tasks.count()==3# WHEN we delete one
tasks.delete(ids[0])# THEN count decreases by 1assert tasks.count()==2
用pytest执行两个py文件：
DY@MacBook-Pro unittest$pytest -v test_delete_unittest.py test_delete_pytest.py
================ test session starts =======================
platform darwin -- Python 3.6.5, pytest-5.1.2, py-1.8.0, pluggy-0.13.0--/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6
cachedir:.pytest_cache
rootdir:/Volumes/Extended/PythonPrograms/Pytest/SourceCode/ch7/unittest
collected 2 items
test_delete_unittest.py::TestNonEmpty::test_delete_decreases_count PASSED [50%]
test_delete_pytest.py::test_delete_decreases_count PASSED [100%]====================2 passed in0.08s ====================
单独运行两个py文件：
DY@MacBook-Pro unittest$pytest -q test_delete_pytest.py
.[100%]1 passed in0.02s
DY@MacBook-Pro unittest$pytest -q test_delete_unittest.py
.[100%]1 passed in0.02s
如上这些执行方式都能够顺利进行，当我们同时执行pytest用例和unittest用例时，如果pytest在前，如下执行结果，只是将两个文件的顺序换了一下
DY@MacBook-Pro unittest$pytest -v test_delete_pytest.py test_delete_unittest.py
================= test session starts ===================
platform darwin -- Python 3.6.5, pytest-5.1.2, py-1.8.0, pluggy-0.13.0--/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6
cachedir:.pytest_cache
rootdir:/Volumes/Extended/PythonPrograms/Pytest/SourceCode/ch7/unittest
collected 2 items
test_delete_pytest.py::test_delete_decreases_count PASSED [50%]
test_delete_unittest.py::TestNonEmpty::test_delete_decreases_count PASSED [100%]
test_delete_unittest.py::TestNonEmpty::test_delete_decreases_count ERROR [100%]================== ERRORS =========================
_______________________________________________________ ERROR at teardown of TestNonEmpty.test_delete_decreases_count ________________________________________________________
tmpdir_factory = TempdirFactory(_tmppath_factory=TempPathFactory(_given_basetemp=None, _trace=<pluggy._tracing.TagTracerSub object at 0x10516de48>, _basetemp=PosixPath('/private/var/folders/8z/8hpwg8c9719b667kqs0qrqrw0000gn/T/pytest-of-DY/pytest-2')))
request =<SubRequest 'tasks_db_session'for<Function test_delete_decreases_count>>@pytest.fixture(scope='session')deftasks_db_session(tmpdir_factory, request):"""Connect to db before tests, disconnect after."""
temp_dir = tmpdir_factory.mktemp('temp')
tasks.start_tasks_db(str(temp_dir),'tiny')yield# this is where the testing happens> tasks.stop_tasks_db()
conftest.py:12:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
defstop_tasks_db():# type: () -> None"""Disconnect API functions from db."""global _tasksdb
> _tasksdb.stop_tasks_db()
E AttributeError:'NoneType'object has no attribute 'stop_tasks_db'/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/tasks/api.py:129: AttributeError
================2 passed,1 error in0.10s ================
用–setup-show进一步研究
DY@MacBook-Pro unittest$pytest -q --setup-show --tb=no test_delete_pytest.py test_delete_unittest.py
SETUP S tmpdir_factory
SETUP S tasks_db_session (fixtures used: tmpdir_factory)
SETUP F tasks_db (fixtures used: tasks_db_session)
SETUP F tasks_just_a_few
SETUP F db_with_3_tasks (fixtures used: tasks_db, tasks_just_a_few)
test_delete_pytest.py::test_delete_decreases_count (fixtures used: db_with_3_tasks, tasks_db, tasks_db_session, tasks_just_a_few, tmpdir_factory).
TEARDOWN F db_with_3_tasks
TEARDOWN F tasks_just_a_few
TEARDOWN F tasks_db
SETUP M _Module__pytest_setup_module
SETUP C _UnitTestCase__pytest_class_setup
test_delete_unittest.py::TestNonEmpty::test_delete_decreases_count (fixtures used: _Module__pytest_setup_module, _UnitTestCase__pytest_class_setup).
TEARDOWN C _UnitTestCase__pytest_class_setup
TEARDOWN M _Module__pytest_setup_module
TEARDOWN S tasks_db_session
TEARDOWN S tmpdir_factoryE
2 passed,1 error in0.11s
会话范围的teardown fixtures会在所有测试结束后执行，这其中包括unittest的用例，而unittest里的tearDownModule()已经关闭了数据库链接，pytest里的tasks_db_sessions() teardown再去做同样的事情则出现里失败。
修复这个问题，可以在unittest中使用pytest的fixture，如下代码所示：
import pytest
import unittest
import tasks
from tasks import Task
@pytest.mark.usefixtures('tasks_db_session')classTestNonEmpty(unittest.TestCase):defsetUp(self):
tasks.delete_all()# start empty# add a few items, saving ids
self.ids =[]
self.ids.append(tasks.add(Task('One','Brian',True)))
self.ids.append(tasks.add(Task('Two','Still Brian',False)))
self.ids.append(tasks.add(Task('Three','Not Brian',False)))deftest_delete_decreases_count(self):# GIVEN 3 items
self.assertEqual(tasks.count(),3)# WHEN we delete one
tasks.delete(self.ids[0])# THEN count decreases by 1
self.assertEqual(tasks.count(),2)
再次执行用例：
DY@MacBook-Pro unittest$pytest -q --setup-show --tb=no test_delete_pytest.py test_delete_unittest.py
SETUP S tmpdir_factory
SETUP S tasks_db_session (fixtures used: tmpdir_factory)
SETUP F tasks_db (fixtures used: tasks_db_session)
SETUP F tasks_just_a_few
SETUP F db_with_3_tasks (fixtures used: tasks_db, tasks_just_a_few)
test_delete_pytest.py::test_delete_decreases_count (fixtures used: db_with_3_tasks, tasks_db, tasks_db_session, tasks_just_a_few, tmpdir_factory).
TEARDOWN F db_with_3_tasks
TEARDOWN F tasks_just_a_few
TEARDOWN F tasks_db
SETUP C _UnitTestCase__pytest_class_setup
test_delete_unittest_fix.py::TestNonEmpty::test_delete_decreases_count (fixtures used: _UnitTestCase__pytest_class_setup, tasks_db_session, tmpdir_factory).
TEARDOWN C _UnitTestCase__pytest_class_setup
TEARDOWN S tasks_db_session
TEARDOWN S tmpdir_factory
2 passed in0.06s
这里只需要会话内在pytest和unittest之间资源共享即可，同时还可以将pytest markers用在unittest上，例如@pytest.mark.skip()/@pytest.mark.xfail(),或者自定义的也可以
然而这里有个小问题，在unittest上用pytest.mark.usefixtures，并不能从fixture直接传递数据给unittest函数，要实现这种传递，可以借助cls对象，如下代码所示
import pytest
import unittest
import tasks
from tasks import Task
@pytest.fixture()deftasks_db_non_empty(tasks_db_session, request):
tasks.delete_all()# start empty# add a few items, saving ids
ids =[]
ids.append(tasks.add(Task('One','Brian',True)))
ids.append(tasks.add(Task('Two','Still Brian',False)))
ids.append(tasks.add(Task('Three','Not Brian',False)))
request.cls.ids = ids
@pytest.mark.usefixtures('tasks_db_non_empty')classTestNonEmpty(unittest.TestCase):deftest_delete_decreases_count(self):# GIVEN 3 items
self.assertEqual(tasks.count(),3)# WHEN we delete one
tasks.delete(self.ids[0])# THEN count decreases by 1
self.assertEqual(tasks.count(),2)
使用标记有一个限制：基于unittest的测试用例不能使用parametrized的fixture，最后一个例子同时使用了pytest fixture 和unittest，把它重构成pytest格式的测试用例并不难，只需要去掉unittest.TestCase基类并且修改assert的使用方式即可
另一个限制是，unittest的测试子集会在首次遇到错误时停止执行，但是单独使用unittest时，无论是否有错，unittest都会依次运行每个测试子集。除非所有的测试子集都能通过，否则pytest不会全部执行
mock模拟函数调用
mock 替换部分系统
Mock可以用来替换系统中某个部分以隔离要测试的代码，Mock对象有时被称为stub、替身，借助mock包和pytest自身的monkeypatch可以实现所有的模拟测试，从python3.3开始mock开始成为python标准库unittest.mock的一部分，更早的版本需要单独安装，然而pytest-mock更加好用，用起来更加方便
使用mock的测试基本上属于白盒测试的范畴了，我们必须查看被测代码的源码从而决定我们需要模拟什么
CLI代码中我们使用了第三方接口Click,然而实现CLI的方式有很多种，包括Python自带的argparse模块，使用Click的原因是他的测试runner模块可以帮助我们测试Click应用程序。
被测代码如下：
"""Command Line Interface (CLI) for tasks project."""from __future__ import print_function
import click
import tasks.config
from contextlib import contextmanager
from tasks.api import Task
# The main entry point for [email protected](context_settings={'help_option_names':['-h','--help']})@click.version_option(version='0.1.1')deftasks_cli():"""Run the tasks application."""pass@tasks_cli.command(help="add a task")@click.argument('summary')@click.option('-o','--owner', default=None,help='set the task owner')defadd(summary, owner):"""Add a task to db."""with _tasks_db():
tasks.add(Task(summary, owner))@tasks_cli.command(help="delete a task")@click.argument('task_id',type=int)defdelete(task_id):"""Remove task in db with given id."""with _tasks_db():
tasks.delete(task_id)@tasks_cli.command(name="list",help="list tasks")@click.option('-o','--owner', default=None,help='list tasks with this owner')deflist_tasks(owner):"""
List tasks in db.
If owner given, only list tasks with that owner.
"""
formatstr ="{: >4} {: >10} {: >5} {}"print(formatstr.format('ID','owner','done','summary'))print(formatstr.format('--','-----','----','-------'))with _tasks_db():for t in tasks.list_tasks(owner):
done ='True'if t.done else'False'
owner =''if t.owner isNoneelse t.owner
print(formatstr.format(
t.id, owner, done, t.summary))@tasks_cli.command(help="update task")@click.argument('task_id',type=int)@click.option('-o','--owner', default=None,help='change the task owner')@click.option('-s','--summary', default=None,help='change the task summary')@click.option('-d','--done', default=None,type=bool,help='change the task done state (True or False)')defupdate(task_id, owner, summary, done):"""Modify a task in db with given id with new info."""with _tasks_db():
tasks.update(task_id, Task(summary, owner, done))@tasks_cli.command(help="list count")defcount():"""Return number of tasks in db."""with _tasks_db():
c = tasks.count()print(c)@contextmanagerdef_tasks_db():
config = tasks.config.get_config()
tasks.start_tasks_db(config.db_path, config.db_type)yield
tasks.stop_tasks_db()if __name__ =='__main__':
tasks_cli()
程序的入口
if __name__ =='__main__':
tasks_cli()
tasks_cli()函数
# The main entry point for [email protected](context_settings={'help_option_names':['-h','--help']})@click.version_option(version='0.1.1')deftasks_cli():"""Run the tasks application."""pass
list命令
@tasks_cli.command(name="list",help="list tasks")@click.option('-o','--owner', default=None,help='list tasks with this owner')deflist_tasks(owner):"""
List tasks in db.
If owner given, only list tasks with that owner.
"""
formatstr ="{: >4} {: >10} {: >5} {}"print(formatstr.format('ID','owner','done','summary'))print(formatstr.format('--','-----','----','-------'))with _tasks_db():for t in tasks.list_tasks(owner):
done ='True'if t.done else'False'
owner =''if t.owner isNoneelse t.owner
print(formatstr.format(
t.id, owner, done, t.summary))
list_tasks(owner)函数依赖其他几个函数：task_db()，他是上下文管理器；tasks.list_tasks(owner)是API功能函数，接下来使用mock模拟tasks_db()和tasks.list_tasks()函数，然后从命令行调用list_tasks()方法，以确保它正确的调用了tasks.list_tasks()函数，并得到了正确的返回值
模拟task_db()函数，先要看它是如何实现的
@contextmanagerdef_tasks_db():
config = tasks.config.get_config()
tasks.start_tasks_db(config.db_path, config.db_type)yield
tasks.stop_tasks_db()
tasks_db()函数是个上下文管理器，它从tasks.config.get_config()得到配置信息并借助这些信息建立数据库链接，这又是另一个外部依赖。yield命令将控制权转移给list_tasks()函数中的with代码块，所有工作完成后会断开数据库链接
从测试CLI命令行调用API功能的角度看，我们并不需要一个真实的数据库链接，因此，可以使用一个简单的stub来替换上下文管理器。
@contextmanagerdefstub_tasks_db():yield
测试代码如下：
from click.testing import CliRunner
from contextlib import contextmanager # 为stub引入上下文管理器用于取代tasks_db()里的上下文管理器import pytest
from tasks.api import Task
import tasks.cli
import tasks.config
@contextmanagerdefstub_tasks_db():yielddeftest_list_no_args(mocker):"""
pytest-mock提供的mocker是非常方便的unitest.mock接口，
第一行代码 mocker.patch.object(tasks.cli, '_tasks_db', new=stub_tasks_db)
使用我们的stub替换原来的tasks_db()函数里的上下文管理器
第二行代码 mocker.patch.object(tasks.cli.tasks, 'list_tasks', return_value=[])
使用默认的MagicMock对象替换了对tasks.list_task()的调用，然后返回一个空列表，后面可以使用这个对象来检查他是否被正确调用。
MagicMock类是unittest.Mock的子类，它可以指定返回值。Mock和MagicMock类模拟其他代码的接口，这让我们了解他们是如何被调用的。
第三行和第四行代码使用了Click框架的CliRunner调用tasks list,就像在命令行调用一样
最后一行代码使用mock对象来确保API被正确调用
assert_called_once_with()方法属于unittest.mock.Mock对象，完整的方法列表可以参考[Python文档](https://docs.python.org/dev/library/unittest.mock.html)
https://docs.python.org/dev/library/unittest.mock.html
:param mocker:
:return:
"""
mocker.patch.object(tasks.cli,'_tasks_db', new=stub_tasks_db)
mocker.patch.object(tasks.cli.tasks,'list_tasks', return_value=[])
runner = CliRunner()
runner.invoke(tasks.cli.tasks_cli,['list'])
tasks.cli.tasks.list_tasks.assert_called_once_with(None)@pytest.fixture()defno_db(mocker):"""
将模拟tasks_db()放入到no_db fixture以便我们以后可以很容易服用
:param mocker:
:return:
"""
mocker.patch.object(tasks.cli,'_tasks_db', new=stub_tasks_db)deftest_list_print_empty(no_db, mocker):"""
tasks.list_tasks()的模拟和之前的例子是一样的，但是这一次我们检查了命令行的输出结果，辨别result.output和expected_output是否相同
assert断言放在第一个测试用例test_list_no_args里，这样就不需要两个测试用例了
然而分成两个测试用例是合理的，一个测试是否正确的调用了API，另一个测试是否输出了正确的结果
其他的测试tasks_list功能的测试用例并没有什么特别之处，只是用来帮我们理解代码
:param no_db:
:param mocker:
:return:
"""
mocker.patch.object(tasks.cli.tasks,'list_tasks', return_value=[])
runner = CliRunner()
result = runner.invoke(tasks.cli.tasks_cli,['list'])
expected_output =(" ID owner done summary\n"" -- ----- ---- -------\n")assert result.output == expected_output
deftest_list_print_many_items(no_db, mocker):
many_tasks =(
Task('write chapter','Brian',True,1),
Task('edit chapter','Katie',False,2),
Task('modify chapter','Brian',False,3),
Task('finalize chapter','Katie',False,4),)
mocker.patch.object(tasks.cli.tasks,'list_tasks',
return_value=many_tasks)
runner = CliRunner()
result = runner.invoke(tasks.cli.tasks_cli,['list'])
expected_output =(" ID owner done summary\n"" -- ----- ---- -------\n"" 1 Brian True write chapter\n"" 2 Katie False edit chapter\n"" 3 Brian False modify chapter\n"" 4 Katie False finalize chapter\n")assert result.output == expected_output
deftest_list_dash_o(no_db, mocker):
mocker.patch.object(tasks.cli.tasks,'list_tasks')
runner = CliRunner()
runner.invoke(tasks.cli.tasks_cli,['list','-o','brian'])
tasks.cli.tasks.list_tasks.assert_called_once_with('brian')deftest_list_dash_dash_owner(no_db, mocker):
mocker.patch.object(tasks.cli.tasks,'list_tasks')
runner = CliRunner()
runner.invoke(tasks.cli.tasks_cli,['list','--owner','okken'])
tasks.cli.tasks.list_tasks.assert_called_once_with('okken')
想更多的了解mock，可以阅读unittest.mock的标准库文档和pypi.python.org网站上的pytest-mock文档
使用pytest-xdist并发执行测试
pytest-xdist：Run Tests in Parallel
[https://pypi.python.org/pypi/pytest-xdist]
在自动化测试中有些资源只能同时被一个测试用例访问，如果不需要同时使用同一个资源，那么测试用例便可以并行执行
执行命令pip install pytest-xdist安装插件
E:\Programs\Python\Python_Pytest\TestScripts>pip install pytest-xdist
Collecting pytest-xdist
Downloading https://files.pythonhosted.org/packages/9f/cc/371b2e6dfbf4e8df07b04e310dd6ea0b3f367e257d1e6cb516b25bc4af1b/pytest_xdist-1.29.0-py2.py3-none-any.whl
Collecting pytest-forked (from pytest-xdist)
Downloading https://files.pythonhosted.org/packages/3f/55/ef92c340e723495dbee91d749903d2b7950b49c501943296257246d7d880/pytest_forked-1.0.2-py2.py3-none-any.whl
Requirement already satisfied: six in c:\python37\lib\site-packages (from pytest-xdist)(1.12.0)
Requirement already satisfied: pytest>=4.4.0 in c:\python37\lib\site-packages (from pytest-xdist)(4.5.0)
Collecting execnet>=1.1(from pytest-xdist)
Downloading https://files.pythonhosted.org/packages/77/1a/f69e1f73bc36f55d3273afd1c52936def71ac67d9c5215be3a4ca3a45577/execnet-1.6.0-py2.py3-none-any.whl
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Collecting apipkg>=1.4(from execnet>=1.1->pytest-xdist)
Downloading https://files.pythonhosted.org/packages/67/08/4815a09603fc800209431bec5b8bd2acf2f95abdfb558a44a42507fb94da/apipkg-1.5-py2.py3-none-any.whl
Installing collected packages: pytest-forked, apipkg, execnet, pytest-xdist
Successfully installed apipkg-1.5 execnet-1.6.0 pytest-forked-1.0.2 pytest-xdist-1.29.0
使用pytest-xdist执行测试
E:\Programs\Python\Python_Pytest\TestScripts>pytest -n auto
================================test session starts ================================================
platform win32 -- Python 3.7.3, pytest-4.5.0, py-1.8.0, pluggy-0.11.0
rootdir: E:\Programs\Python\Python_Pytest\TestScripts
plugins: xdist-1.29.0, repeat-0.8.0, forked-1.0.2, allure-pytest-2.6.3
gw0 [17] / gw1 [17] / gw2 [17] / gw3 [17]...........FF..F. [100%]=========================== FAILURES ================================================
________________________________________ test_true ____________________________________________
[gw2] win32 -- Python 3.7.3 c:\python37\python.exe
def test_true():
> assert not is_prime(7)
E assert not True
E + where True = is_prime(7)
test_asserts.py:65: AssertionError
__________________________________________ test_add4 ___________________________________________
[gw3] win32 -- Python 3.7.3 c:\python37\python.exe
def test_add4():
> assert add(17,22)>=50
E assert 39>=50
E + where 39= add(17, 22)
test_asserts.py:34: AssertionError
______________________________ test_not_equal _____________________________________________
[gw1] win32 -- Python 3.7.3 c:\python37\python.exe
def test_not_equal():
> assert (1, 2, 3)==(3, 2, 1)
E assert (1, 2, 3)==(3, 2, 1)
E At index 0 diff: 1!=3
E Use -v to get the full diff
test_one.py:9: AssertionError
==============================3 failed, 14 passed, 4 warnings in2.20 seconds ===============================
参数说明
-n auto 自动侦测系统里的CPU数目
-n numprocesses 指定运行测试的处理器进程数
使用pytest-repeat重复执行用例
pytest-repeat：Run Tests More Than Once
运行命令pip install pytest-repeat[https://pypi.python.org/pypi/pytest-repeat]
E:\Programs\Python\Python_Pytest\TestScripts>pip install pytest-repeat
Collecting pytest-repeat
Downloading https://files.pythonhosted.org/packages/2e/de/c1d69002db74a99b3df0463e95066c03d82d9d2a53be738c140207134e0f/pytest_repeat-0.8.0-py2.py3-none-any.whl
Requirement already satisfied: pytest>=3.6in c:\python37\lib\site-packages (from pytest-repeat)(4.5.0)
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Installing collected packages: pytest-repeat
Successfully installed pytest-repeat-0.8.0
执行测试，运行命令
pytest --count=2 -v
E:\Programs\Python\Python_Pytest\TestScripts>pytest --count=2-v
======================== test session starts==============================================
platform win32 -- Python 3.7.3, pytest-4.5.0, py-1.8.0, pluggy-0.11.0-- c:\python37\python.exe
cachedir:.pytest_cache
rootdir: E:\Programs\Python\Python_Pytest\TestScripts
plugins: repeat-0.8.0, allure-pytest-2.6.3
collected 34 items
test_asserts.py::test_add[1-2] PASSED [2%]
test_asserts.py::test_add[2-2] PASSED [5%]
test_asserts.py::test_add2[1-2] PASSED [8%]
test_asserts.py::test_add2[2-2] PASSED [11%]
test_asserts.py::test_add3[1-2] PASSED [14%]
test_asserts.py::test_add3[2-2] PASSED [17%]
test_asserts.py::test_add4[1-2] FAILED [20%]
test_asserts.py::test_add4[2-2] FAILED [23%]
test_asserts.py::test_in[1-2] PASSED [26%]
test_asserts.py::test_in[2-2] PASSED [29%]
test_asserts.py::test_not_in[1-2] PASSED [32%]
test_asserts.py::test_not_in[2-2] PASSED [35%]
test_asserts.py::test_true[1-2] FAILED [38%]
test_asserts.py::test_true[2-2] FAILED [41%]
test_fixture1.py::test_numbers_3_4[1-2] PASSED [44%]
test_fixture1.py::test_numbers_3_4[2-2] PASSED [47%]
test_fixture1.py::test_strings_a_3[1-2] PASSED [50%]
test_fixture1.py::test_strings_a_3[2-2] PASSED [52%]
test_fixture2.py::TestUM::test_numbers_5_6[1-2] PASSED [55%]
test_fixture2.py::TestUM::test_numbers_5_6[2-2] PASSED [58%]
test_fixture2.py::TestUM::test_strings_b_2[1-2] PASSED [61%]
test_fixture2.py::TestUM::test_strings_b_2[2-2] PASSED [64%]
test_one.py::test_equal[1-2] PASSED [67%]
test_one.py::test_equal[2-2] PASSED [70%]
test_one.py::test_not_equal[1-2] FAILED [73%]
test_one.py::test_not_equal[2-2] FAILED [76%]
test_two.py::test_default[1-2] PASSED [79%]
test_two.py::test_default[2-2] PASSED [82%]
test_two.py::test_member_access[1-2] PASSED [85%]
test_two.py::test_member_access[2-2] PASSED [88%]
test_two.py::test_asdict[1-2] PASSED [91%]
test_two.py::test_asdict[2-2] PASSED [94%]
test_two.py::test_replace[1-2] PASSED [97%]
test_two.py::test_replace[2-2] PASSED [100%]============================================ FAILURES ====================================
________________________________ test_add4[1-2] _______________________________________
deftest_add4():>assert add(17,22)>=50
E assert39>=50
E + where 39= add(17,22)
test_asserts.py:34: AssertionError
_________________________ test_add4[2-2] ______________________________________________
deftest_add4():>assert add(17,22)>=50
E assert39>=50
E + where 39= add(17,22)
test_asserts.py:34: AssertionError
________________________ test_true[1-2] __________________________________________
deftest_true():>assertnot is_prime(7)
E assertnotTrue
E + where True= is_prime(7)
test_asserts.py:65: AssertionError
____________________________ test_true[2-2] ______________________________________________
deftest_true():>assertnot is_prime(7)
E assertnotTrue
E + where True= is_prime(7)
test_asserts.py:65: AssertionError
__________________________ test_not_equal[1-2] ____________________________________________
deftest_not_equal():>assert(1,2,3)==(3,2,1)
E assert(1,2,3)==(3,2,1)
E At index 0 diff:1!=3
E Full diff:
E -(1,2,3)
E ? ^^
E +(3,2,1)
E ? ^^
test_one.py:9: AssertionError
_________________________________ test_not_equal[2-2] ____________________________________
deftest_not_equal():>assert(1,2,3)==(3,2,1)
E assert(1,2,3)==(3,2,1)
E At index 0 diff:1!=3
E Full diff:
E -(1,2,3)
E ? ^^
E +(3,2,1)
E ? ^^
test_one.py:9: AssertionError
===================6 failed,28 passed,1 warnings in0.77 seconds =======================
可与重复一个测试子集，后者某一个测试，甚至可以让他在晚上重复执行N次，同时可以让他遇到错误就停止
使用pytest-instafail查看详细堆栈信息
当测试执行遇到失败或错误时能及时看到详细的堆栈信息
pytest-instafail：See Details of Failures and Errors
[https://pypi.python.org/pypi/pytest-instafail]
执行命令pip install pytest-instafail安装插件
E:\Programs\Python\Python_Pytest\TestScripts>pip install pytest-instafail
Collecting pytest-instafail
Downloading https://files.pythonhosted.org/packages/fa/16/473621ad68cc2a1cb2888478e66db5080a06adf695470c8dd4ec669c25d5/pytest-instafail-0.4.1.tar.gz
Requirement already satisfied: pytest>=2.9in c:\python37\lib\site-packages (from pytest-instafail)(4.5.0)
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Building wheels for collected packages: pytest-instafail
Building wheel for pytest-instafail (setup.py)... done
Stored in directory: C:\Users\davieyang\AppData\Local\pip\Cache\wheels\16\cb\de\3a1d2f5c992fedf9a86b8eead949a606a6c953228ac1fe0655
Successfully built pytest-instafail
Installing collected packages: pytest-instafail
Successfully installed pytest-instafail-0.4.1
通常情况下，pytest执行完毕后，会显示错误和失败用例的堆栈信息，如果测试用例比较多，运行时间太长，很可能我们希望不是到最才看到堆栈回溯信息，使用此插件便可以测试执行失败立马显示异常信息
执行测试
E:\Programs\Python\Python_Pytest\TestScripts>pytest --tb=line --instafail
========================= test session starts ========================================
platform win32 -- Python 3.7.3, pytest-4.5.0, py-1.8.0, pluggy-0.11.0
rootdir: E:\Programs\Python\Python_Pytest\TestScripts
plugins: xdist-1.29.0, timeout-1.3.3, repeat-0.8.0, instafail-0.4.1, forked-1.0.2, allure-pytest-2.6.3
collected 17 items
test_asserts.py ...F
E:\Programs\Python\Python_Pytest\TestScripts\test_asserts.py:34:assert39>=50
test_asserts.py ..F
E:\Programs\Python\Python_Pytest\TestScripts\test_asserts.py:65:assertnotTrue
test_fixture1.py ..[52%]
test_fixture2.py ..[64%]
test_one.py .F
E:\Programs\Python\Python_Pytest\TestScripts\test_one.py:9:assert(1,2,3)==(3,2,1)
test_two.py ....[100%]===================3 failed,14 passed,1 warnings in0.32 seconds =======================
使用pytest-timeout设置执行测试的时限
pytest-timeout：Put Time Limits on Your Tests
[https://pypi.python.org/pypi/pytest-time]
运行命令
pip install pytest-timeout
，安装插件
E:\Programs\Python\Python_Pytest\TestScripts>pip install pytest-timeout
Collecting pytest-timeout
Downloading https://files.pythonhosted.org/packages/58/92/f60ea2e27074d6f97c8aaf21e34d1f838eb623e4b8070680846c65318a10/pytest_timeout-1.3.3-py2.py3-none-any.whl
Requirement already satisfied: pytest>=3.6.0in c:\python37\lib\site-packages (from pytest-timeout)(4.5.0)
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Requirement already satisfied: setuptools in c:\users\davieyang\appdata\roaming\python\python37\site-packages (from pytest>=3.6.0->pytest-timeout)(41.0.1)
Installing collected packages: pytest-timeout
Successfully installed pytest-timeout-1.3.3
执行命令
pytest --timeout=0.1
E:\Programs\Python\Python_Pytest\TestScripts>pytest --timeout=0.1======================== test session starts =============================================
platform win32 -- Python 3.7.3, pytest-4.5.0, py-1.8.0, pluggy-0.11.0
rootdir: E:\Programs\Python\Python_Pytest\TestScripts
plugins: xdist-1.29.0, timeout-1.3.3, repeat-0.8.0, forked-1.0.2, allure-pytest-2.6.3
timeout:0.1s
timeout method: thread
timeout func_only:False
collected 17 items
test_asserts.py ...F..F [41%]
test_fixture1.py ..[52%]
test_fixture2.py ..[64%]
test_one.py .F [76%]
test_two.py ....[100%]================================== FAILURES ===============================================
_________________________________ test_add4 ______________________________________________
deftest_add4():>assert add(17,22)>=50
E assert39>=50
E + where 39= add(17,22)
test_asserts.py:34: AssertionError
______________________________ test_true ______________________________________________
deftest_true():>assertnot is_prime(7)
E assertnotTrue
E + where True= is_prime(7)
test_asserts.py:65: AssertionError
________________________________ test_not_equal _________________________________________
deftest_not_equal():>assert(1,2,3)==(3,2,1)
E assert(1,2,3)==(3,2,1)
E At index 0 diff:1!=3
E Use -v to get the full diff
test_one.py:9: AssertionError
====================3 failed,14 passed,1 warnings in0.32 seconds ======================
使用Tox在多环境下的用例执行
tox 测试多种配置
tox是个命令行工具，它允许测试在多种环境下运行，不仅仅是不同的python版本，可以以用它来测试不同的依赖配置和不同的操作系统配置，其工作方式是通过setup.py文件为待测程序创建源码安装包，他会查看tox.ini中的所有环境设置，并针对每个环境设置执行如下操作
安装tox
C:\Users\davieyang>pip install tox
Collecting tox
Using cached https://files.pythonhosted.org/packages/a7/0c/ed234b83d2c4fcef1cfccf97371183d51dafae62e64334de34d0a6333114/tox-3.14.0-py2.py3-none-any.whl
Collecting importlib-metadata<1,>=0.12; python_version <"3.8"(from tox)
Downloading https://files.pythonhosted.org/packages/f6/d2/40b3fa882147719744e6aa50ac39cf7a22a913cbcba86a0371176c425a3b/importlib_metadata-0.23-py2.py3-none-any.whl
Requirement already satisfied: py<2,>=1.4.17in c:\python37\lib\site-packages (from tox)(1.8.0)
Requirement already satisfied: six<2,>=1.0.0in c:\python37\lib\site-packages (from tox)(1.12.0)
Collecting toml>=0.9.4(from tox)
Using cached https://files.pythonhosted.org/packages/a2/12/ced7105d2de62fa7c8fb5fce92cc4ce66b57c95fb875e9318dba7f8c5db0/toml-0.10.0-py2.py3-none-any.whl
Requirement already satisfied: packaging>=14in c:\python37\lib\site-packages (from tox)(19.0)
Collecting filelock<4,>=3.0.0(from tox)
Downloading https://files.pythonhosted.org/packages/93/83/71a2ee6158bb9f39a90c0dea1637f81d5eef866e188e1971a1b1ab01a35a/filelock-3.0.12-py3-none-any.whl
Collecting virtualenv>=14.0.0(from tox)
Downloading https://files.pythonhosted.org/packages/8b/12/8d4f45b8962b03ac9efefe5ed5053f6b29334d83e438b4fe379d21c0cb8e/virtualenv-16.7.5-py2.py3-none-any.whl (3.3MB)100%|████████████████████████████████|3.3MB 9.9kB/s
Collecting pluggy<1,>=0.12.0(from tox)
Downloading https://files.pythonhosted.org/packages/92/c7/48439f7d5fd6bddb4c04b850bb862b42e3e2b98570040dfaf68aedd8114b/pluggy-0.13.0-py2.py3-none-any.whl
Collecting zipp>=0.5(from importlib-metadata<1,>=0.12; python_version <"3.8"->tox)
Downloading https://files.pythonhosted.org/packages/74/3d/1ee25a26411ba0401b43c6376d2316a71addcc72ef8690b101b4ea56d76a/zipp-0.6.0-py2.py3-none-any.whl
Requirement already satisfied: pyparsing>=2.0.2in c:\python37\lib\site-packages (from packaging>=14->tox)(2.4.0)
Requirement already satisfied: more-itertools in c:\python37\lib\site-packages (from zipp>=0.5->importlib-metadata<1,>=0.12; python_version <"3.8"->tox)(7.0.0)
Installing collected packages: zipp, importlib-metadata, toml, filelock, virtualenv, pluggy, tox
Found existing installation: pluggy 0.11.0
Uninstalling pluggy-0.11.0:
Successfully uninstalled pluggy-0.11.0
Successfully installed filelock-3.0.12 importlib-metadata-0.23 pluggy-0.13.0 toml-0.10.0 tox-3.14.0 virtualenv-16.7.5 zipp-0.6.0
配置tox.ini
- 在tox目录下创建一个虚拟环境
- 使用pip安装依赖包
- 使用pip在步骤1的虚拟环境中安装自己的程序包
- 运行测试用例
- 所有环境都测试完成后，tox生成一个汇总的测试结果 在项目文件最顶层添加tox.ini文件（与setup.py放在一个目录里），然后在tox.ini文件里写入如下内容
;---; Excerpted from"Python Testing with pytest",; published by The Pragmatic Bookshelf.; Copyrights apply to this code. It may not be used to create training material,; courses, books, articles,and the like. Contact us if you are in doubt.; We make no guarantees that this code is fit forany purpose.; Visit http://www.pragmaticprogrammer.com/titles/bopytest for more book information.;---# tox.ini , put in same dir as setup.py[tox]
envlist = py27,py37
[testenv]
deps=pytest
commands=pytest
[pytest]
addopts =-rsxX -l --tb=short --strict
markers =
smoke: Run the smoke test test functions
get: Run the test functions that test tasks.get()
选项描述
envlist=py27,py36
表示使用python2.7和python3.6来运行测试用例
deps=pytest
表示让tox确保pytest已经安装，如果有多个依赖还可以继续以相同方式罗列，并且还可以指定版本
commands=pytest
告诉tox在每个环境里运行pytest
执行tox
然后在tox.ini所在路径下执行tox命令即可，它会使用指定的两个环境执行该路径下tests文件夹内的所有测试用例。
(venv) E:\Programs\Python\Python_Pytest\SourceCode\ch7\tasks_proj_v2>tox
GLOB sdist-make: E:\Programs\Python\Python_Pytest\SourceCode\ch7\tasks_proj_v2\setup.py
py37 create: E:\Programs\Python\Python_Pytest\SourceCode\ch7\tasks_proj_v2\.tox\py37
py37 installdeps: pytest
......----------------------------------Summary----------------------------------------------------------------------------------
py27: commands succeeded
py36: commands succeeded
congratulations :)
使用pytest-sugar让测试结果更有趣
pytest-sugar: instafail+Colors+Progress Bar
使用命令pip install pytest-sugar安装插件
E:\Programs\Python\Python_Pytest\TestScripts>pip install pytest-sugar
Collecting pytest-sugar
Downloading https://files.pythonhosted.org/packages/da/3b/f1e3c8830860c1df8f0e0f6713932475141210cfa021e362ca2774d2bf02/pytest_sugar-0.9.2-py2.py3-none-any.whl
Requirement already satisfied: pytest>=2.9in c:\python37\lib\site-packages (from pytest-sugar)(4.5.0)
Collecting packaging>=14.1(from pytest-sugar)
Downloading https://files.pythonhosted.org/packages/91/32/58bc30e646e55eab8b21abf89e353f59c0cc02c417e42929f4a9546e1b1d/packaging-19.0-py2.py3-none-any.whl
Collecting termcolor>=1.1.0(from pytest-sugar)
Downloading https://files.pythonhosted.org/packages/8a/48/a76be51647d0eb9f10e2a4511bf3ffb8cc1e6b14e9e4fab46173aa79f981/termcolor-1.1.0.tar.gz
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Requirement already satisfied: setuptools in c:\users\davieyang\appdata\roaming\python\python37\site-packages (from pytest>=2.9->pytest-sugar)(41.0.1)
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Requirement already satisfied: more-itertools>=4.0.0; python_version >"2.7"in c:\python37\lib\site-packages (from pytest>=2.9->pytest-sugar)(7.0.0)
Collecting pyparsing>=2.0.2(from packaging>=14.1->pytest-sugar)
Downloading https://files.pythonhosted.org/packages/dd/d9/3ec19e966301a6e25769976999bd7bbe552016f0d32b577dc9d63d2e0c49/pyparsing-2.4.0-py2.py3-none-any.whl (62kB)100%|████████████████████████████████| 71kB 19kB/s
Building wheels for collected packages: termcolor
Building wheel for termcolor (setup.py)... done
Stored in directory: C:\Users\davieyang\AppData\Local\pip\Cache\wheels\7c\06\54\bc84598ba1daf8f970247f550b175aaaee85f68b4b0c5ab2c6
Successfully built termcolor
Installing collected packages: pyparsing, packaging, termcolor, pytest-sugar
Successfully installed packaging-19.0 pyparsing-2.4.0 pytest-sugar-0.9.2 termcolor-1.1.0
执行测试
E:\Programs\Python\Python_Pytest\TestScripts>pytest
Test session starts (platform: win32, Python 3.7.3, pytest 4.5.0, pytest-sugar 0.9.2)
rootdir: E:\Programs\Python\Python_Pytest\TestScripts
plugins: xdist-1.29.0, timeout-1.3.3, sugar-0.9.2, repeat-0.8.0, instafail-0.4.1, forked-1.0.2, allure-pytest-2.6.3
collecting ...
test_asserts.py ✓ 6% ▋
test_asserts.py ✓✓ 12% █▎
test_asserts.py ✓✓✓ 18% █▊
――――――――――――――――――――――――――――――――――――――――――test_add4――――――――――――――――――――――――――――――――――――――――
deftest_add4():>assert add(17,22)>=50
E assert39>=50
E + where 39= add(17,22)
test_asserts.py:34: AssertionError
test_asserts.py ⨯ 24% ██▍
test_asserts.py ⨯✓ 29% ██▉
test_asserts.py ⨯✓✓ 35% ███▌
――――――――――――――――――――――――――――――――――――――― test_true――――――――――――――――――――――――――――――――――――――――――
deftest_true():>assertnot is_prime(7)
E assertnotTrue
E + where True= is_prime(7)
test_asserts.py:65: AssertionError
test_asserts.py ⨯ 41% ████▎
test_fixture1.py ✓ 47% ████
test_fixture1.py ✓✓ 53% ████
█▍
test_fixture2.py ✓ 59% ████
test_fixture2.py ✓✓ 65% ████
██▌
test_one.py ✓ 71% ████
███▏
―――――――――――――――――――――――――――――――――――― test_not_equal ―――――――――――――――――――――――――――――――――――――――
deftest_not_equal():>assert(1,2,3)==(3,2,1)
E assert(1,2,3)==(3,2,1)
E At index 0 diff:1!=3
E Use -v to get the full diff
test_one.py:9: AssertionError
test_one.py ⨯ 76% █████
██▋
test_two.py ✓ 82% ████
test_two.py ✓✓ 88% ████
test_two.py ✓✓✓ 94% ███
test_two.py ✓✓✓✓ 100% ███
███████
==================================== warnings summary ===================================
c:\python37\lib\site-packages\_pytest\mark\structures.py:324
c:\python37\lib\site-packages\_pytest\mark\structures.py:324: PytestUnknownMarkWarning: Unknown pytest.mark.run_these_cases -is this a typo? You can register custom mar
ks to avoid this warning -for details, see https://docs.pytest.org/en/latest/mark.html
PytestUnknownMarkWarning,-- Docs: https://docs.pytest.org/en/latest/warnings.html
Results (0.47s):14 passed
3 failed
- test_asserts.py:33 test_add4
- test_asserts.py:64 test_true
- test_one.py:8 test_not_equal
使用PDB在测试失败时开启调试模式
PDB试失败的测试用例
--pdb
是Python标准库里的调试模块，在pytest里，可以使用–pdb选项在测试失败是开启调试的交互模式
(venv) E:\Programs\Python\Python_Pytest\TestScripts>pytest --pdb -v -x --lf
========================== test session starts =====================================
platform win32 -- Python 3.7.3, pytest-4.5.0, py-1.8.0, pluggy-0.11.0-- c:\python37\python.exe
cachedir:.pytest_cache
rootdir: E:\Programs\Python\Python_Pytest\TestScripts, inifile: pytest.ini
plugins: xdist-1.29.0, timeout-1.3.3, repeat-0.8.0, nice-0.1.0, instafail-0.4.1, forked-1.0.2, emoji-0.2.0, allure-pytest-2.6.3
collected 119 items
run-last-failure: no previously failed tests,not deselecting items.
test_api_exceptions.py::TestAdd::test_missing_summary PASSED [0%]
test_api_exceptions.py::TestAdd::test_done_not_bool FAILED [1%]>>>>>>>>>>>>>>>>>>> traceback >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
self =<TestScripts.test_api_exceptions.TestAdd object at 0x0000000CEEA430F0>deftest_done_not_bool(self):"""Should raise an exception if done is not a bool."""with pytest.raises(ValueError):> tasks.add(Task(summary='summary', done='True'))
E Failed: DID NOT RAISE <class'ValueError'>
test_api_exceptions.py:19: Failed
>>>>>>>>>>>>>>>>>>>>> entering PDB >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> e:\programs\python\python_pytest\testscripts\test_api_exceptions.py(19)test_done_not_bool()-> tasks.add(Task(summary='summary', done='True'))(Pdb)
加上了
--pdb
参数的执行结果，我们看到最后进入了(Pdb)的交互模式，(Pdb)提示符出现了，表明可以使用pdb的交互调试功能
参数介绍p/print expr输出expr的值pp expr美化输出expr的值l/list列出错误并显示错误之前和之后的5行代码l/list begin,end列出错误，并通过行号指定需要显示的代码区域a/args打印当前函数的参数列表（断点发生在帮助函数中会很实用）u/up移动到堆栈的上一层d/down移动到堆栈的下一层q/quit退出当前调试会话更多的pdb使用方法可参考PDB详细的使用方法
pytest-emoji
pytest-emoji:Add Some Fun to Your Tests
执行命令pip install pytest-emoji安装插件
E:\Programs\Python\Python_Pytest\TestScripts>pip install pytest-emoji
Collecting pytest-emoji
Downloading https://files.pythonhosted.org/packages/f7/51/80af966c0aded877da7577d21c4601ca98c6f603c6e6073ddea071af01ec/pytest_emoji-0.2.0-py3-none-any.whl
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Installing collected packages: pytest-emoji
Successfully installed pytest-emoji-0.2.0
分别用三种方式执行测试，比较测试结果看–emoji的效果
E:\Programs\Python\Python_Pytest\TestScripts>pytest --tb=no
==================== test session starts ===============================
platform win32 -- Python 3.7.3, pytest-4.5.0, py-1.8.0, pluggy-0.11.0
rootdir: E:\Programs\Python\Python_Pytest\TestScripts
plugins: xdist-1.29.0, timeout-1.3.3, repeat-0.8.0, instafail-0.4.1, forked-1.0.2, emoji-0.2.0, allure-pytest-2.6.3
collected 17 items
test_asserts.py ...F..F [41%]
test_fixture1.py ..[52%]
test_fixture2.py ..[64%]
test_one.py .F [76%]
test_two.py ....[100%]============3 failed,14 passed,1 warnings in0.31 seconds ================
E:\Programs\Python\Python_Pytest\TestScripts>pytest --tb=no -v
======================== test session starts ==========================
platform win32 -- Python 3.7.3, pytest-4.5.0, py-1.8.0, pluggy-0.11.0-- c:\python37\python.exe
cachedir:.pytest_cache
rootdir: E:\Programs\Python\Python_Pytest\TestScripts
plugins: xdist-1.29.0, timeout-1.3.3, repeat-0.8.0, instafail-0.4.1, forked-1.0.2, emoji-0.2.0, allure-pytest-2.6.3
collected 17 items
test_asserts.py::test_add PASSED [5%]
test_asserts.py::test_add2 PASSED [11%]
test_asserts.py::test_add3 PASSED [17%]
test_asserts.py::test_add4 FAILED [23%]
test_asserts.py::test_in PASSED [29%]
test_asserts.py::test_not_in PASSED [35%]
test_asserts.py::test_true FAILED [41%]
test_fixture1.py::test_numbers_3_4 PASSED [47%]
test_fixture1.py::test_strings_a_3 PASSED [52%]
test_fixture2.py::TestUM::test_numbers_5_6 PASSED [58%]
test_fixture2.py::TestUM::test_strings_b_2 PASSED [64%]
test_one.py::test_equal PASSED [70%]
test_one.py::test_not_equal FAILED [76%]
test_two.py::test_default PASSED [82%]
test_two.py::test_member_access PASSED [88%]
test_two.py::test_asdict PASSED [94%]
test_two.py::test_replace PASSED [100%]===============3 failed,14 passed,1 warnings in0.37 seconds ==============
E:\Programs\Python\Python_Pytest\TestScripts>pytest --tb=no --emoji
=============== test session starts ========================
platform win32 -- Python 3.7.3, pytest-4.5.0, py-1.8.0, pluggy-0.11.0
rootdir: E:\Programs\Python\Python_Pytest\TestScripts
plugins: xdist-1.29.0, timeout-1.3.3, repeat-0.8.0, instafail-0.4.1, forked-1.0.2, emoji-0.2.0, allure-pytest-2.6.3
collected 17 items
test_asserts.py ? ? ? ? ? ? ?
[41%]
test_fixture1.py ? ? [52%]
test_fixture2.py ? ? [64%]
test_one.py ? ? [76%]
test_two.py ? ? ? ?
[100%]==========3 failed,14 passed,1 warnings in0.32 seconds =================
静态分析插件
静态分析工具可以在不运行代码的情况下进行检查，静态分析失败同样会被现实为测试失败
pytest-pycodestyle和pytest-pep8
PEP8是python代码风格指南，Python的标准库代码要求遵循它的规范，pycodestyle命令行工具可以用来检查Python代码是否尊存了PEP8，安装了pytest-pycodestyle后，在命令行使用–pep8，ptest将会调用pycodestyle检查代码是否符合PEP8的规范。
安装pytest-pycodestyle
(venv) E:\LeadsCloudAutoTest>pip install pytest-codestyle
Collecting pytest-codestyle
Downloading https://files.pythonhosted.org/packages/9e/34/45a946ba6df347caae559deef76427f677cf7fb8614a436dab4611bb7df0/pytest-codestyle-1.4.0.tar.gz
Requirement already satisfied: pytest in c:\python37\lib\site-packages (from pytest-codestyle)(4.0.2)
Collecting pycodestyle (from pytest-codestyle)
Downloading https://files.pythonhosted.org/packages/0e/0c/04a353e104d2f324f8ee5f4b32012618c1c86dd79e52a433b64fceed511b/pycodestyle-2.5.0-py2.py3-none-any.whl (51kB)|████████████████████████████████| 51kB 182kB/s
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Requirement already satisfied: setuptools in c:\python37\lib\site-packages (from pytest->pytest-codestyle)(40.8.0)
Requirement already satisfied: colorama; sys_platform =="win32"in c:\python37\lib\site-packages (from pytest->pytest-codestyle)(0.4.1)
Requirement already satisfied: attrs>=17.4.0in c:\python37\lib\site-packages (from pytest->pytest-codestyle)(19.1.0)
Requirement already satisfied: py>=1.5.0in c:\python37\lib\site-packages (from pytest->pytest-codestyle)(1.8.0)
Requirement already satisfied: importlib-metadata>=0.12in c:\python37\lib\site-packages (from pluggy>=0.7->pytest->pytest-codestyle)(0.18)
Requirement already satisfied: zipp>=0.5in c:\python37\lib\site-packages (from importlib-metadata>=0.12->pluggy>=0.7->pytest->pytest-codestyle)(0.5.1)
Installing collected packages: pycodestyle, pytest-codestyle
Running setup.py install for pytest-codestyle ... done
Successfully installed pycodestyle-2.5.0 pytest-codestyle-1.4.0
使用pytest --codestyle执行测试
(venv) E:\LeadsCloudAutoTest\TestScript>pytest --codestyle
============================= test session starts =============================
platform win32 -- Python 3.7.3, pytest-4.0.2, py-1.8.0, pluggy-0.12.0
rootdir: E:\LeadsCloudAutoTest\TestScript, inifile:
plugins: allure-adaptor-1.7.10, codestyle-1.4.0
collected 3 items
__init__.py .[33%]
test_login_page.py F
DevTools listening on ws://127.0.0.1:50280/devtools/browser/27f89578-f93f-4819-a7ed-2dc0196dde3a
F [100%]================================== FAILURES ===================================
______________________________ pycodestyle-check ______________________________
E:\LeadsCloudAutoTest\TestScript\test_login_page.py:11:1: E302 expected 2 blank lines, found 1classTest_Login_Page(unittest.TestCase):^
E:\LeadsCloudAutoTest\TestScript\test_login_page.py:42:23: W292 no newline at end of file
time.sleep(10)^
_________________________ Test_Login_Page.test_login __________________________
self =<TestScript.test_login_page.Test_Login_Page testMethod=test_login>deftest_login(self):
self.driver.get("http://admin.xxxxxx.com/Front-Vue/#/")> Login_Page(self.driver).input_user_name().send_keys("yangdawei_10171")
test_login_page.py:34:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
..\PageObject\Login_Page.py:18:in input_user_name
input_user_name = self.get_element.get_element_location("leadscloud_login","input_user_name",5)..\Util\ParseElementLocator.py:58:in get_element_location
raise e
..\Util\ParseElementLocator.py:53:in get_element_location
element = WebDriverWait(driver, timeout).until(lambda x: x.find_element(by=location_type,
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self =<selenium.webdriver.support.wait.WebDriverWait (session="ce40498c40d3786b00554e66125ba5bc")>
method =<function ParseConfigFile.get_element_location.<locals>.<lambda> at 0x0000002F7305C378>
message =''defuntil(self, method, message=''):"""Calls the method provided with the driver as an argument until the \
return value is not False."""
screen =None
stacktrace =None
end_time = time.time()+ self._timeout
whileTrue:try:
value = method(self._driver)if value:return value
except self._ignored_exceptions as exc:
screen =getattr(exc,'screen',None)
stacktrace =getattr(exc,'stacktrace',None)
time.sleep(self._poll)if time.time()> end_time:break>raise TimeoutException(message, screen, stacktrace)
E selenium.common.exceptions.TimeoutException: Message:
c:\python37\lib\site-packages\selenium\webdriver\support\wait.py:80: TimeoutException
---------------------------- Captured stdout call -----------------------------
读取到的定位类型为：xpath 读取到的定位信息为：//*[@id='main']/div/div[2]/div[2]/div[2]/div/form/div[1]/div/div/input
定位元素超过5秒，详细异常信息入下：
=====================2 failed,1 passed in16.24 seconds =====================
在测试结果中能看到如下内容：
================================== FAILURES ===================================
______________________________ pycodestyle-check ______________________________
E:\LeadsCloudAutoTest\TestScript\test_login_page.py:11:1: E302 expected 2 blank lines, found 1classTest_Login_Page(unittest.TestCase):^
E:\LeadsCloudAutoTest\TestScript\test_login_page.py:42:23: W292 no newline at end of file
time.sleep(10)^
pytest-flake8
pep8只能检测代码风格，flake8会做更多的静态检测，它集成了多种Python代码风格，多种静态分析工具的检查标准，它可以定制许多选项，通过该插件能够帮助分析代码除了分析代码风格外，还能检查逻辑错误
安装pytest-flake8
C:\Users\davieyang>pip install pytest-flake8
Collecting pytest-flake8
Downloading https://files.pythonhosted.org/packages/4b/99/a6e993c0927665522602058e1f2ea61ba1c8c51a60e3006f1eb1153b37e2/pytest_flake8-1.0.4-py2.py3-none-any.whl
Collecting flake8>=3.5(from pytest-flake8)
Downloading https://files.pythonhosted.org/packages/26/de/3f815a99d86eb10464ea7bd6059c0172c7ca97d4bdcfca41051b388a653b/flake8-3.7.8-py2.py3-none-any.whl (70kB)|████████████████████████████████| 71kB 353kB/s
Requirement already satisfied: pytest>=3.5in c:\python37\lib\site-packages (from pytest-flake8)(4.0.2)
Collecting mccabe<0.7.0,>=0.6.0(from flake8>=3.5->pytest-flake8)
Downloading https://files.pythonhosted.org/packages/87/89/479dc97e18549e21354893e4ee4ef36db1d237534982482c3681ee6e7b57/mccabe-0.6.1-py2.py3-none-any.whl
Collecting pyflakes<2.2.0,>=2.1.0(from flake8>=3.5->pytest-flake8)
Downloading https://files.pythonhosted.org/packages/84/f2/ed0ffb887f8138a8fe5a621b8c0bb9598bfb3989e029f6c6a85ee66628ee/pyflakes-2.1.1-py2.py3-none-any.whl (59kB)|████████████████████████████████| 61kB 326kB/s
Requirement already satisfied: pycodestyle<2.6.0,>=2.5.0in c:\python37\lib\site-packages (from flake8>=3.5->pytest-flake8)(2.5.0)
Collecting entrypoints<0.4.0,>=0.3.0(from flake8>=3.5->pytest-flake8)
Downloading https://files.pythonhosted.org/packages/ac/c6/44694103f8c221443ee6b0041f69e2740d89a25641e62fb4f2ee568f2f9c/entrypoints-0.3-py2.py3-none-any.whl
Requirement already satisfied: pluggy>=0.7in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8)(0.12.0)
Requirement already satisfied: atomicwrites>=1.0in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8)(1.3.0)
Requirement already satisfied: six>=1.10.0in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8)(1.12.0)
Requirement already satisfied: py>=1.5.0in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8)(1.8.0)
Requirement already satisfied: setuptools in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8)(40.8.0)
Requirement already satisfied: more-itertools>=4.0.0in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8)(7.1.0)
Requirement already satisfied: attrs>=17.4.0in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8)(19.1.0)
Requirement already satisfied: colorama; sys_platform =="win32"in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8)(0.4.1)
Requirement already satisfied: importlib-metadata>=0.12in c:\python37\lib\site-packages (from pluggy>=0.7->pytest>=3.5->pytest-flake8)(0.18)
Requirement already satisfied: zipp>=0.5in c:\python37\lib\site-packages (from importlib-metadata>=0.12->pluggy>=0.7->pytest>=3.5->pytest-flake8)(0.5.1)
Installing collected packages: mccabe, pyflakes, entrypoints, flake8, pytest-flake8
Successfully installed entrypoints-0.3 flake8-3.7.8 mccabe-0.6.1 pyflakes-2.1.1 pytest-flake8-1.0.4
使用pytest --flake8执行测试
(venv) E:\Python_Pytest\TestScripts>pytest --flake8
============================= test session starts =============================
platform win32 -- Python 3.7.3, pytest-4.0.2, py-1.8.0, pluggy-0.12.0
rootdir: E:\Python_Pytest\TestScripts, inifile:
plugins: allure-adaptor-1.7.10, codestyle-1.4.0, flake8-1.0.4
collected 25 items
__init__.py .[4%]
TestLogApi.py .[8%]
test_asserts.py F...F...F [44%]
test_fixture1.py F..[56%]
test_fixture2.py ...[68%]
test_one.py F.F [80%]
test_two.py F....[100%]================================== FAILURES ===================================
________________________________ FLAKE8-check _________________________________
E:\Python_Pytest\TestScripts\test_asserts.py:5:13: W291 trailing whitespace
------------------------------ Captured log call ------------------------------
checker.py 112 WARNING The --jobs option isnot available on Windows due to a bug (https://bugs.python.org/issue27649)in Python 2.7.11+and3.3+. We have detected that you are running an unsupported version of Pyth
on on Windows. Ignoring --jobs arguments.
__________________________________ test_add4 __________________________________
@pytest.mark.aaaadeftest_add4():>assert add(17,22)>=50
E assert39>=50
E + where 39= add(17,22)
test_asserts.py:36: AssertionError
________________________________ test_not_true ________________________________
deftest_not_true():>assertnot is_prime(7)
E assertnotTrue
E + where True= is_prime(7)
test_asserts.py:70: AssertionError
________________________________ FLAKE8-check _________________________________
E:\Python_Pytest\TestScripts\test_fixture1.py:5:13: W291 trailing whitespace
E:\Python_Pytest\TestScripts\test_fixture1.py:16:15: E231 missing whitespace after ','
E:\Python_Pytest\TestScripts\test_fixture1.py:46:24: E231 missing whitespace after ','------------------------------ Captured log call ------------------------------
checker.py 112 WARNING The --jobs option isnot available on Windows due to a bug (https://bugs.python.org/issue27649)in Python 2.7.11+and3.3+. We have detected that you are running an unsupported version of Pyth
on on Windows. Ignoring --jobs arguments.
________________________________ FLAKE8-check _________________________________
E:\Python_Pytest\TestScripts\test_one.py:15:1: W391 blank line at end of file------------------------------ Captured log call ------------------------------
checker.py 112 WARNING The --jobs option isnot available on Windows due to a bug (https://bugs.python.org/issue27649)in Python 2.7.11+and3.3+. We have detected that you are running an unsupported version of Pyth
on on Windows. Ignoring --jobs arguments.
_______________________________ test_not_equal ________________________________
deftest_not_equal():>assert(1,2,3)==(3,2,1)
E assert(1,2,3)==(3,2,1)
E At index 0 diff:1!=3
E Use -v to get the full diff
test_one.py:9: AssertionError
________________________________ FLAKE8-check _________________________________
E:\Python_Pytest\TestScripts\test_two.py:2:37: E231 missing whitespace after ','
E:\Python_Pytest\TestScripts\test_two.py:2:45: E231 missing whitespace after ','
E:\Python_Pytest\TestScripts\test_two.py:2:52: E231 missing whitespace after ','
E:\Python_Pytest\TestScripts\test_two.py:5:1: E402 module level importnot at top of file
E:\Python_Pytest\TestScripts\test_two.py:34:33: E231 missing whitespace after ','
E:\Python_Pytest\TestScripts\test_two.py:34:41: E231 missing whitespace after ','------------------------------ Captured log call ------------------------------
checker.py 112 WARNING The --jobs option isnot available on Windows due to a bug (https://bugs.python.org/issue27649)in Python 2.7.11+and3.3+. We have detected that you are running an unsupported version of Pyth
on on Windows. Ignoring --jobs arguments.=====================7 failed,18 passed in0.54 seconds =====================
pytest-selenium
//TO DO
pytest-django
//TO DO
pytest-flask
//TO DO
本文转载自: https://blog.csdn.net/dawei_yang000000/article/details/140274414
版权归原作者 Davieyang.D.Y 所有， 如有侵权，请联系我们删除。
版权归原作者 Davieyang.D.Y 所有， 如有侵权，请联系我们删除。