pytest-playwright basic tutorial (1) - installation and simple use

pytest-playwright basic tutorial (1) - installation and simple use

Structure of this article

1. How to install Playwright

2. How to run the test case

3. Brief introduction of fixture

a brief introdction

This tutorial is mainly a translated official website tutorial

Attach the official document link: Installation | Playwright Python

How to install Playwright

Enter in the pycharm terminal

pip install pytest-playwright

Just wait for the installation

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After the installation is complete, enter in the terminal

playwright install

Install the browser driver that comes with playwright

How to run the test case

Create a file test_my_application.pynamed and enter the following content

import re
from playwright.sync_api import Page, expect


def test_homepage_has_Playwright_in_title_and_get_started_link_linking_to_the_intro_page(page: Page):
    page.goto("https://playwright.dev/")

    # 查找是否存在标题 为"Playwright".
    expect(page).to_have_title(re.compile("Playwright"))

    # 创建一个定位器实例
    get_started = page.get_by_role("link", name="Get started")

    # 严格查找一个值"/docs/intro".
    expect(get_started).to_have_attribute("href", "/docs/intro")

    # 点击 get_started 按钮.
    get_started.click()

    # 判断该链接中是否包含"intro".
    expect(page).to_have_url(re.compile(".*intro"))

Type in terminal

pytest

run test case

By default, the chromium kernel will be used to run the test case, and the default is headless mode, that is, the page will not be displayed. The final result will be displayed in the terminal

The role of the expect()function is: wait until the expected condition is met

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Using pytest's test fixture

import pytest
from playwright.sync_api import Page


@pytest.fixture(scope="function", autouse=True)
def before_each_after_each(page: Page):
    print("beforeEach")
    # Go to the starting url before each test.
    page.goto("https://playwright.dev/")
    yield
    print("afterEach")

def test_main_navigation(page: Page):
    # Assertions use the expect API.
    expect(page).to_have_url("https://playwright.dev/")

@pytest.fixture(scope="function",autouse=True)The role of it is to allow each test case to use the function decorated by this decorator to achieve code reuse

Parameter introduction:

scope = "function"The function of means that the use of this fixture is when each test function is executed

autouse = TrueIndicates that this fixture automatically finds qualified test cases, executes them automatically, and does not need to call this function again

Among them, the yieldprevious code is executed before the test case, yieldand the subsequent code is executed after the test case

The execution effect is as follows

Summarize

This article introduces how to start using playwright+pytest for simple tests, and also introduces the use of fixtures in pytest, hoping to help everyone (●'◡'●)