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PyTest with Selenium: Tutorial to Run Your First Test on LambdaTest

In this topic, you will learn how to configure and run your Python automation testing scripts on LambdaTest Selenium cloud platform Python framework PyTest.

Objective​

By the end of this topic, you will be able to:

  1. Set up an environment for testing your hosted web pages using PyTest framework with Selenium.
  2. Understand and configure the core capabilities required for your Selenium test suite.
  3. Test your locally hosted pages on LambdaTest platform.
  4. Explore advanced features of LambdaTest.

Note: All the code samples in this documentation can be found in the LambdaTest's Repository on GitHub. You can either download or clone the repository to quickly run your tests.

Prerequisites to Perform PyTest automation testing With LambdaTest Selenium Grid​

Before you can start performing Python automation testing using pytest, you would need to:

  • Install the latest Python build from the official website. We recommend using the latest version.
  • Make sure pip is installed in your system. You can install pip from here.
  • Download the latest Selenium Client and its WebDriver bindings from the official website. Latest versions of Selenium Client and WebDriver are ideal for running your automation script on LambdaTest Selenium cloud grid.
  • Install virtualenv which is the recommended way to run your tests. It will isolate the build from other setups you may have running and ensure that the tests run with the specified versions of the modules.
pip install virtualenv

Installing Selenium Dependencies and Tutorial Repo​

Step 1: Clone the LambdaTest’s pytest-selenium-sample repository and navigate to the code directory as shown below:

git clone https://github.com/LambdaTest/pytest-selenium-sample
cd pytest-selenium-sample

Step 2: Create a virtual environment in your project folder the environment name is arbitrary.

virtualenv venv

Step 3: Activate the environment.

source venv/bin/activate

Step 4: Install the required packages from the cloned project directory:

pip install -r requirements.txt

Setting up Your Authentication​

Make sure you have your LambdaTest credentials with you to run test automation scripts on LambdaTest Selenium Grid. You can obtain these credentials from the LambdaTest Automation Dashboard or through LambdaTest Profile.

Step 5: Set LambdaTest Username and Access Key in environment variables.

  • For Linux/macOS:
export LT_USERNAME="YOUR_USERNAME" export LT_ACCESS_KEY="YOUR ACCESS KEY"
  • For Windows:
set LT_USERNAME="YOUR_USERNAME" set LT_ACCESS_KEY="YOUR ACCESS KEY"

Run Your First Test​

Sample Test Case​

Let’s check the sample test script in tests/lt_sample_todo.py from the cloned repo.

# tests/lt_sample_todo.py

import pytest
import sys

@pytest.mark.usefixtures('driver')
class TestLink:

    def test_title(self, driver):
        """
        Verify click and title of page
        :return: None
        """
        driver.get('https://lambdatest.github.io/sample-todo-app/')
        driver.find_element_by_name("li1").click()
        driver.find_element_by_name("li2").click()

        title = "Sample page - lambdatest.com"
        assert title == driver.title


    def test_item(self, driver):
        """
        Verify item submission
        :return: None
        """
        driver.get('https://lambdatest.github.io/sample-todo-app/')
        sample_text = "Happy Testing at LambdaTest"
        email_text_field = driver.find_element_by_id("sampletodotext")
        email_text_field.send_keys(sample_text)

        driver.find_element_by_id("addbutton").click()
        
        li6 = driver.find_element_by_name("li6")
        sys.stderr.write(li6)
        # assert sample_text in li6

Configuration of Your Test Capabilities​

Step 6: In the conftest.py file, you need to update your test capabilities. In this code, we are passing browser, browser version, and operating system information, along with LambdaTest Selenium grid capabilities via capabilities object. The capabilities that we have used in the code are defined as:

capabilities = {
        "build": "Sample PY Build",
        "platformName": "Windows 11",
        "browserName": "Chrome",
        "browserVersion": "latest",
}

You can generate capabilities for your test requirements with the help of our inbuilt Capabilities Generator tool.

Executing the Test​

Step 7: You would need to navigate to tests directory and execute the below command in your terminal/cmd.

cd tests //navigate to tests directory
python lt_sample_todo.py

Your test results would be displayed on the test console (or command-line interface if you are using terminal/cmd) and on LambdaTest automation dashboard. LambdaTest Automation Dashboard will help you view all your text logs, screenshots and video recording for your entire automation tests.

Run Your Parallel Tests Using PyTest Framework​

Executing Parallel Tests Using PyTest​

To run parallel tests using PyTest, we would have to execute the below command in the terminal:

pytest -s -n=2 tests/lt_sample_todo.py

In the above command, we have used -s to disable the output capture & -n is used to specify the number of parallel test execution. Your test results would be displayed on the test console (or command-line interface if you are using terminal/cmd) and on LambdaTest automation dashboard.

Testing Locally Hosted or Privately Hosted Projects​

You can test your locally hosted or privately hosted projects with LambdaTest Selenium grid cloud using LambdaTest Tunnel app. All you would have to do is set up an SSH tunnel using LambdaTest Tunnel app and pass toggle tunnel = True via desired capabilities. LambdaTest Tunnel establishes a secure SSH protocol based tunnel that allows you in testing your locally hosted or privately hosted pages, even before they are made live.

Refer our LambdaTest Tunnel documentation for more information.

Here’s how you can establish LambdaTest Tunnel.

Download the binary file of:

Open command prompt and navigate to the binary folder.

Run the following command:

LT -user {user’s login email} -key {user’s access key}

So if your user name is lambdatest@example.com and key is 123456, the command would be:

LT -user lambdatest@example.com -key 123456

Once you are able to connect LambdaTest Tunnel successfully, you would just have to pass on tunnel capabilities in the code shown below :

Tunnel Capability

"tunnel" : true
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