48新一代自动化测试神器playwright+python系列课程_playwright_expect断言

45_playwright_expect断言

playwright 提供了一个 expect方法 用于断言，该方法提供了丰富的断言场景，我们来看一下expect的使用。

expect 使用

断言	描述
expect(locator).to_be_checked()	Checkbox is checked
expect(locator).to_be_disabled()	Element is disabled
expect(locator).to_be_editable()	Element is enabled
expect(locator).to_be_empty()	Container is empty
expect(locator).to_be_enabled()	Element is enabled
expect(locator).to_be_focused()	Element is focused
expect(locator).to_be_hidden()	Element is not visible
expect(locator).to_be_visible()	Element is visible
expect(locator).to_contain_text()	Element contains text
expect(locator).to_have_attribute()	Element has a DOM attribute
expect(locator).to_have_class()	Element has a class property
expect(locator).to_have_count()	List has exact number of children
expect(locator).to_have_css()	Element has CSS property
expect(locator).to_have_id()	Element has an ID
expect(locator).to_have_js_property()	Element has a JavaScript property
expect(locator).to_have_text()	Element matches text
expect(locator).to_have_value()	Input has a value
expect(locator).to_have_values()	Select has options selected
expect(page).to_have_title()	Page has a title
expect(page).to_have_url()	Page has a URL
expect(api_response).to_be_ok()	Response has an OK status

Expect提供的断言场景非常多，我们选择一些常用的断言场景看一下使用的案例，工作中我们可以选择网页的标题和url来进行断言，我们先来看一下to_have_title()和to_have_url()两个方法的使用。

实践代码：

# '''

# author: 测试-老姜   交流微信/QQ：349940839

# 欢迎添加微信或QQ，加入学习群共同学习交流。

# QQ交流群号：877498247

# 西安的朋友欢迎当面交流。

# '''

from playwright.sync_api import Playwright, sync_playwright, expect

def run(playwright: Playwright) -> None:

    browser = playwright.chromium.launch(headless=False,slow_mo=2000)

    context = browser.new_context(record_video_dir="videos") #设置录屏保存目录

    page = context.new_page()

    page.goto("http://127.0.0.1/zentao/user-login.html") # 使用相对地址

    page.locator("#account").fill("admin")

    page.locator("input[name=\"password\"]").click()

    page.locator("input[name=\"password\"]").fill("Deshifuzhi01")

    page.get_by_role("button", name="登录").click()

    #脚本执行完成后断言网页的标题是不是'地盘 - 禅道'

    expect(page).to_have_title('地盘 - 禅道')

    #脚本执行完成后断言网页的标题是不是'http://127.0.0.1/zentao/my.html'

    expect(page).to_have_url('http://127.0.0.1/zentao/my.html')

    page.wait_for_timeout(10000)

    # ---------------------

    context.close() # 上下文关闭时保存录屏

    browser.close()

如果断言失败，会爆出unexpected value XXXX的异常信息。

我们再看一下to_have_count(),以元素的个数来断言。

实践代码：

# '''

# author: 测试-老姜   交流微信/QQ：349940839

# 欢迎添加微信或QQ，加入学习群共同学习交流。

# QQ交流群号：877498247

# 西安的朋友欢迎当面交流。

# '''

from playwright.sync_api import Playwright, sync_playwright, expect

def run(playwright: Playwright) -> None:

    browser = playwright.chromium.launch(headless=False,slow_mo=2000)

    context = browser.new_context(record_video_dir="videos") #设置录屏保存目录

    page = context.new_page()

    page.goto("http://127.0.0.1/zentao/user-login.html") # 使用相对地址

    page.locator("#account").fill("admin")

    page.locator("input[name=\"password\"]").click()

    page.locator("input[name=\"password\"]").fill("Deshifuzhi01")

    loc = page.locator('text=登录')

    #断言包含登录两个字的元素是否为2个

    expect(loc).to_have_count(2)

    # ---------------------

    context.close() # 上下文关闭时保存录屏

    browser.close()

with sync_playwright() as playwright:

    run(playwright)

to_have_text()：以元素上的文本是否等于字符串来断言

实践代码：

# '''

# author: 测试-老姜   交流微信/QQ：349940839

# 欢迎添加微信或QQ，加入学习群共同学习交流。

# QQ交流群号：877498247

# 西安的朋友欢迎当面交流。

# '''

from playwright.sync_api import Playwright, sync_playwright, expect

def run(playwright: Playwright) -> None:

    browser = playwright.chromium.launch(headless=False,slow_mo=2000)

    context = browser.new_context(record_video_dir="videos") #设置录屏保存目录

    page = context.new_page()

    page.goto("http://127.0.0.1/zentao/user-login.html") # 使用相对地址

    page.locator("#account").fill("admin")

    page.locator("input[name=\"password\"]").click()

    page.locator("input[name=\"password\"]").fill("Deshifuzhi01")

    page.locator('text="登录"').click()

    loc = page.frame_locator('#appIframe-my').locator('.user-welcome')

    #断言元素上是否等于文本'admin，下午好！'

    expect(loc).to_have_text('admin，晚上好！')

    page.wait_for_timeout(10000)

    # ---------------------

    context.close() # 上下文关闭时保存录屏

    browser.close()

with sync_playwright() as playwright:

    run(playwright)

to_contain_text()：以元素上的文本是否包含字符串来断言

# '''

# author: 测试-老姜   交流微信/QQ：349940839

# 欢迎添加微信或QQ，加入学习群共同学习交流。

# QQ交流群号：877498247

# 西安的朋友欢迎当面交流。

# '''

from playwright.sync_api import Playwright, sync_playwright, expect

def run(playwright: Playwright) -> None:

    browser = playwright.chromium.launch(headless=False,slow_mo=2000)

    context = browser.new_context(record_video_dir="videos") #设置录屏保存目录

    page = context.new_page()

    page.goto("http://127.0.0.1/zentao/user-login.html") # 使用相对地址

    page.locator("#account").fill("admin")

    page.locator("input[name=\"password\"]").click()

    page.locator("input[name=\"password\"]").fill("Deshifuzhi01")

    page.locator('text="登录"').click()

    loc = page.frame_locator('#appIframe-my').locator('.user-welcome')

    #断言元素上是否包含文本'admin'

    expect(loc).to_contain_text('admin')

    page.wait_for_timeout(10000)

    # ---------------------

    context.close() # 上下文关闭时保存录屏

    browser.close()