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-playwrightDownloading 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-urlDownloading pytest_base_url-2.0.0-py3-none-any.whl (4.6 kB)
Requirement already satisfied: playwright>=1.18 in c:\program files\python37\lib\site-packages (from pytest-playwright) (1.22.0)
Collecting python-slugifyDownloading python_slugify-6.1.2-py2.py3-none-any.whl (9.4 kB)
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Collecting text-unidecode>=1.3Downloading text_unidecode-1.3-py2.py3-none-any.whl (78 kB)---------------------------------------- 78.2/78.2 kB 432.6 kB/s eta 0:00:00
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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.py
def test_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 Pagedef test_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 --slowmo 100
======================================= 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 in 2.66s ====================================================
跳过测试用例
# test_my_application.py
import pytest@pytest.mark.skip_browser("firefox")
def test_visit_example(page):page.goto("https://example.com")# ...
指定特殊浏览器执行
代码中指定
# conftest.py
import pytest@pytest.mark.only_browser("chromium")
def test_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 in 1.96s ============================================定义base-url
创建Py文件，并写入如下代码
from playwright.sync_api import Pagedef test_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 in 2.31s =====================================
忽略HTTPS错误
# conftest.py
import pytest@pytest.fixture(scope="session")
def browser_context_args(browser_context_args):return {**browser_context_args,"ignore_https_errors": True}
自定义分辨率
# conftest.py
import pytest@pytest.fixture(scope="session")
def browser_context_args(browser_context_args):return {**browser_context_args,"viewport": {"width": 1920,"height": 1080,}}
设备模拟
# conftest.py
import pytest@pytest.fixture(scope="session")
def browser_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.py
import pytest
from playwright.sync_api import BrowserType
from typing import Dict@pytest.fixture(scope="session")
def context(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 contextcontext.close()
结合Unittest单元测试框架执行用例
import pytest
import unittestfrom playwright.sync_api import Pageclass MyTest(unittest.TestCase):@pytest.fixture(autouse=True)def setup(self, page: Page):self.page = pagedef test_foobar(self):self.page.goto("https://microsoft.com")self.page.click("#foobar")assert self.page.evaluate("1 + 1") == 2Pytest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 Taskdef setUpModule():"""Make temp dir, initialize DB."""global temp_dirtemp_dir = tempfile.mkdtemp()tasks.start_tasks_db(str(temp_dir), 'tiny')def tearDownModule():"""Clean up DB, remove temp dir."""tasks.stop_tasks_db()shutil.rmtree(temp_dir)class TestNonEmpty(unittest.TestCase):def setUp(self):tasks.delete_all() # start empty# add a few items, saving idsself.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)))def test_delete_decreases_count(self):# GIVEN 3 itemsself.assertEqual(tasks.count(), 3)# WHEN we delete onetasks.delete(self.ids[0])# THEN count decreases by 1self.assertEqual(tasks.count(), 2)
用pytest执行这段unittest框架下的用例：
DY@MacBook-Pro unittest$pytest -v test_delete_unittest.py
======================= test session starts ============================
platform darwin -- Python 3.6.5, pytest-5.1.2, py-1.8.0, pluggy-0.13.0 -- /Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6
cachedir: .pytest_cache
rootdir: /Volumes/Extended/PythonPrograms/Pytest/SourceCode/ch7/unittest
collected 1 item test_delete_unittest.py::TestNonEmpty::test_delete_decreases_count PASSED [100%]========================= 1 passed in 0.08s ==========================
使用unittest执行这段用例：
DY@MacBook-Pro unittest$python3 -m unittest -v test_delete_unittest.py
test_delete_decreases_count (test_delete_unittest.TestNonEmpty) ... ok----------------------------------------------------------------------
Ran 1 test in 0.019sOK
再有一个pytest用例，如下代码所示：
import tasksdef test_delete_decreases_count(db_with_3_tasks):ids = [t.id for t in tasks.list_tasks()]# GIVEN 3 itemsassert tasks.count() == 3# WHEN we delete onetasks.delete(ids[0])# THEN count decreases by 1assert tasks.count() == 2
用pytest执行两个py文件：
DY@MacBook-Pro unittest$pytest -v test_delete_unittest.py test_delete_pytest.py
================ test session starts =======================
platform darwin -- Python 3.6.5, pytest-5.1.2, py-1.8.0, pluggy-0.13.0 -- /Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6
cachedir: .pytest_cache
rootdir: /Volumes/Extended/PythonPrograms/Pytest/SourceCode/ch7/unittest
collected 2 items test_delete_unittest.py::TestNonEmpty::test_delete_decreases_count PASSED [ 50%]
test_delete_pytest.py::test_delete_decreases_count PASSED [100%]==================== 2 passed in 0.08s ====================
单独运行两个py文件：
DY@MacBook-Pro unittest$pytest -q test_delete_pytest.py
. [100%]
1 passed in 0.02s
DY@MacBook-Pro unittest$pytest -q test_delete_unittest.py
. [100%]
1 passed in 0.02s
如上这些执行方式都能够顺利进行，当我们同时执行pytest用例和unittest用例时，如果pytest在前，如下执行结果，只是将两个文件的顺序换了一下
DY@MacBook-Pro unittest$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')def tasks_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:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ def stop_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 in 0.10s ================
用–setup-show进一步研究
DY@MacBook-Pro unittest$pytest -q --setup-show --tb=no test_delete_pytest.py test_delete_unittest.pySETUP S tmpdir_factory
SETUP S tasks_db_session (fixtures used: tmpdir_factory)SETUP F tasks_db (fixtures used: tasks_db_session)SETUP F tasks_just_a_fewSETUP F db_with_3_tasks (fixtures used: tasks_db, tasks_just_a_few)test_delete_pytest.py::test_delete_decreases_count (fixtures used: db_with_3_tasks, tasks_db, tasks_db_session, tasks_just_a_few, tmpdir_factory).TEARDOWN F db_with_3_tasksTEARDOWN F tasks_just_a_fewTEARDOWN F tasks_dbSETUP M _Module__pytest_setup_moduleSETUP C _UnitTestCase__pytest_class_setuptest_delete_unittest.py::TestNonEmpty::test_delete_decreases_count (fixtures used: _Module__pytest_setup_module, _UnitTestCase__pytest_class_setup).TEARDOWN C _UnitTestCase__pytest_class_setupTEARDOWN M _Module__pytest_setup_module
TEARDOWN S tasks_db_session
TEARDOWN S tmpdir_factoryE
2 passed, 1 error in 0.11s会话范围的teardown fixtures会在所有测试结束后执行，这其中包括unittest的用例，而unittest里的tearDownModule()已经关闭了数据库链接，pytest里的tasks_db_sessions() teardown再去做同样的事情则出现里失败。
修复这个问题，可以在unittest中使用pytest的fixture，如下代码所示：
import pytest
import unittest
import tasks
from tasks import Task@pytest.mark.usefixtures('tasks_db_session')
class TestNonEmpty(unittest.TestCase):def setUp(self):tasks.delete_all() # start empty# add a few items, saving idsself.ids = []self.ids.append(tasks.add(Task('One', 'Brian', True)))self.ids.append(tasks.add(Task('Two', 'Still Brian', False)))self.ids.append(tasks.add(Task('Three', 'Not Brian', False)))def test_delete_decreases_count(self):# GIVEN 3 itemsself.assertEqual(tasks.count(), 3)# WHEN we delete onetasks.delete(self.ids[0])# THEN count decreases by 1self.assertEqual(tasks.count(), 2)
再次执行用例：
DY@MacBook-Pro unittest$pytest -q --setup-show --tb=no test_delete_pytest.py test_delete_unittest.pySETUP 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_fewSETUP 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_tasksTEARDOWN F tasks_just_a_fewTEARDOWN F tasks_dbSETUP C _UnitTestCase__pytest_class_setuptest_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 in 0.06s
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()
def tasks_db_non_empty(tasks_db_session, request):tasks.delete_all() # start empty# add a few items, saving idsids = []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')
class TestNonEmpty(unittest.TestCase):def test_delete_decreases_count(self):# GIVEN 3 itemsself.assertEqual(tasks.count(), 3)# WHEN we delete onetasks.delete(self.ids[0])# THEN count decreases by 1self.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 tasks.
@click.group(context_settings={'help_option_names': ['-h', '--help']})
@click.version_option(version='0.1.1')
def tasks_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')
def add(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)
def delete(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')
def list_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 is None else t.ownerprint(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)')
def update(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")
def count():"""Return number of tasks in db."""with _tasks_db():c = tasks.count()print(c)@contextmanager
def _tasks_db():config = tasks.config.get_config()tasks.start_tasks_db(config.db_path, config.db_type)yieldtasks.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 tasks.
@click.group(context_settings={'help_option_names': ['-h', '--help']})
@click.version_option(version='0.1.1')
def tasks_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')
def list_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 is None else t.ownerprint(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
@contextmanager
def _tasks_db():config = tasks.config.get_config()tasks.start_tasks_db(config.db_path, config.db_type)yieldtasks.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。
@contextmanager
def stub_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@contextmanager
def stub_tasks_db():yielddef test_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()
def no_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)def test_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_outputdef test_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_outputdef test_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')def test_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-xdistDownloading 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.exedef 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.exedef 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.exedef 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 difftest_one.py:9: AssertionError
============================== 3 failed, 14 passed, 4 warnings in 2.20 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-repeatDownloading https://files.pythonhosted.org/packages/2e/de/c1d69002db74a99b3df0463e95066c03d82d9d2a53be738c140207134e0f/pytest_repeat-0.8.0-py2.py3-none-any.whl
Requirement already satisfied: pytest>=3.6 in 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] _______________________________________def test_add4():
> assert add(17,22) >= 50
E assert 39 >= 50
E + where 39 = add(17, 22)test_asserts.py:34: AssertionError
_________________________ test_add4[2-2] ______________________________________________def test_add4():
> assert add(17,22) >= 50
E assert 39 >= 50
E + where 39 = add(17, 22)test_asserts.py:34: AssertionError
________________________ test_true[1-2] __________________________________________def test_true():
> assert not is_prime(7)
E assert not True
E + where True = is_prime(7)test_asserts.py:65: AssertionError
____________________________ test_true[2-2] ______________________________________________def test_true():
> assert not is_prime(7)
E assert not True
E + where True = is_prime(7)test_asserts.py:65: AssertionError
__________________________ test_not_equal[1-2] ____________________________________________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 Full diff:
E - (1, 2, 3)
E ? ^ ^
E + (3, 2, 1)
E ? ^ ^test_one.py:9: AssertionError
_________________________________ test_not_equal[2-2] ____________________________________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 Full diff:
E - (1, 2, 3)
E ? ^ ^
E + (3, 2, 1)
E ? ^ ^test_one.py:9: AssertionError
=================== 6 failed, 28 passed, 1 warnings in 0.77 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-instafailDownloading https://files.pythonhosted.org/packages/fa/16/473621ad68cc2a1cb2888478e66db5080a06adf695470c8dd4ec669c25d5/pytest-instafail-0.4.1.tar.gz
Requirement already satisfied: pytest>=2.9 in c:\python37\lib\site-packages (from pytest-instafail) (4.5.0)
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Building wheels for collected packages: pytest-instafailBuilding wheel for pytest-instafail (setup.py) ... doneStored 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 ...FE:\Programs\Python\Python_Pytest\TestScripts\test_asserts.py:34: assert 39 >= 50test_asserts.py ..FE:\Programs\Python\Python_Pytest\TestScripts\test_asserts.py:65: assert not Truetest_fixture1.py .. [ 52%]
test_fixture2.py .. [ 64%]
test_one.py .FE:\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 in 0.32 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-timeoutDownloading https://files.pythonhosted.org/packages/58/92/f60ea2e27074d6f97c8aaf21e34d1f838eb623e4b8070680846c65318a10/pytest_timeout-1.3.3-py2.py3-none-any.whl
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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 ______________________________________________def test_add4():
> assert add(17,22) >= 50
E assert 39 >= 50
E + where 39 = add(17, 22)test_asserts.py:34: AssertionError
______________________________ test_true ______________________________________________def test_true():
> assert not is_prime(7)
E assert not True
E + where True = is_prime(7)test_asserts.py:65: AssertionError
________________________________ test_not_equal _________________________________________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 difftest_one.py:9: AssertionError==================== 3 failed, 14 passed, 1 warnings in 0.32 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 toxUsing 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
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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>=14 in 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
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Installing collected packages: zipp, importlib-metadata, toml, filelock, virtualenv, pluggy, toxFound existing installation: pluggy 0.11.0Uninstalling 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 for any 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 functionsget: 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-sugarDownloading https://files.pythonhosted.org/packages/da/3b/f1e3c8830860c1df8f0e0f6713932475141210cfa021e362ca2774d2bf02/pytest_sugar-0.9.2-py2.py3-none-any.whl
Requirement already satisfied: pytest>=2.9 in 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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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: termcolorBuilding wheel for termcolor (setup.py) ... doneStored 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――――――――――――――――――――――――――――――――――――――――def test_add4():
> assert add(17,22) >= 50
E assert 39 >= 50
E + where 39 = add(17, 22)test_asserts.py:34: AssertionErrortest_asserts.py ⨯ 24% ██▍test_asserts.py ⨯✓ 29% ██▉test_asserts.py ⨯✓✓ 35% ███▌――――――――――――――――――――――――――――――――――――――― test_true――――――――――――――――――――――――――――――――――――――――――def test_true():
> assert not is_prime(7)
E assert not True
E + where True = is_prime(7)test_asserts.py:65: AssertionErrortest_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 ―――――――――――――――――――――――――――――――――――――――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 difftest_one.py:9: AssertionErrortest_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:324c:\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.htmlPytestUnknownMarkWarning,-- Docs: https://docs.pytest.org/en/latest/warnings.htmlResults (0.47s):14 passed3 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>def test_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-emojiDownloading 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 in 0.31 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 in 0.37 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 ? ? [ 5
2%]
test_fixture2.py ? ? [ 6
4%]
test_one.py ? ? [ 7
6%]
test_two.py ? ? ? ? [100%]
========== 3 failed, 14 passed, 1 warnings in 0.32 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-codestyleDownloading 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
Requirement already satisfied: six>=1.10.0 in c:\python37\lib\site-packages (from pytest->pytest-codestyle) (1.12.0)
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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)
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Requirement already satisfied: py>=1.5.0 in c:\python37\lib\site-packages (from pytest->pytest-codestyle) (1.8.0)
Requirement already satisfied: importlib-metadata>=0.12 in c:\python37\lib\site-packages (from pluggy>=0.7->pytest->pytest-codestyle) (0.18)
Requirement already satisfied: zipp>=0.5 in c:\python37\lib\site-packages (from importlib-metadata>=0.12->pluggy>=0.7->pytest->pytest-codestyle) (0.5.1)
Installing collected packages: pycodestyle, pytest-codestyleRunning 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 1
class Test_Login_Page(unittest.TestCase):
^
E:\LeadsCloudAutoTest\TestScript\test_login_page.py:42:23: W292 no newline at end of filetime.sleep(10)^_________________________ Test_Login_Page.test_login __________________________self = <TestScript.test_login_page.Test_Login_Page testMethod=test_login>def test_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_nameinput_user_name = self.get_element.get_element_location("leadscloud_login", "input_user_name", 5)
..\Util\ParseElementLocator.py:58: in get_element_locationraise e
..\Util\ParseElementLocator.py:53: in get_element_locationelement = 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 = ''def until(self, method, message=''):"""Calls the method provided with the driver as an argument until the \return value is not False."""screen = Nonestacktrace = Noneend_time = time.time() + self._timeoutwhile True:try:value = method(self._driver)if value:return valueexcept 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 in 16.24 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 1
class Test_Login_Page(unittest.TestCase):
^
E:\LeadsCloudAutoTest\TestScript\test_login_page.py:42:23: W292 no newline at end of filetime.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-flake8Downloading 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>=3.5 in 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,>=2.5.0 in 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>=0.7 in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8) (0.12.0)
Requirement already satisfied: atomicwrites>=1.0 in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8) (1.3.0)
Requirement already satisfied: six>=1.10.0 in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8) (1.12.0)
Requirement already satisfied: py>=1.5.0 in 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>=4.0.0 in c:\python37\lib\site-packages (from pytest>=3.5->pytest-flake8) (7.1.0)
Requirement already satisfied: attrs>=17.4.0 in 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>=0.12 in c:\python37\lib\site-packages (from pluggy>=0.7->pytest>=3.5->pytest-flake8) (0.18)
Requirement already satisfied: zipp>=0.5 in 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 is not available on Windows due to a bug (https://bugs.python.org/issue27649) in Python 2.7.11+ and 3.3+. We have detected that you are running an unsupported version of Pyth
on on Windows. Ignoring --jobs arguments.
__________________________________ test_add4 __________________________________@pytest.mark.aaaadef test_add4():
> assert add(17, 22) >= 50
E assert 39 >= 50
E + where 39 = add(17, 22)test_asserts.py:36: AssertionError
________________________________ test_not_true ________________________________def test_not_true():
> assert not is_prime(7)
E assert not True
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 is not available on Windows due to a bug (https://bugs.python.org/issue27649) in Python 2.7.11+ and 3.3+. 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 is not available on Windows due to a bug (https://bugs.python.org/issue27649) in Python 2.7.11+ and 3.3+. We have detected that you are running an unsupported version of Pyth
on on Windows. Ignoring --jobs arguments.
_______________________________ test_not_equal ________________________________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 difftest_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 import not 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 is not available on Windows due to a bug (https://bugs.python.org/issue27649) in Python 2.7.11+ and 3.3+. We have detected that you are running an unsupported version of Pyth
on on Windows. Ignoring --jobs arguments.
===================== 7 failed, 18 passed in 0.54 seconds =====================pytest-selenium
//TO DO
pytest-django
//TO DO
pytest-flask
//TO DO
