Build a Pytest API Automation Test Project from 0 to 1

1. Create a project directory

mkdir Pytest-API-Testing-Demo

2.Project initialization

// Go to the project folder
cd Pytest-API-Testing-Demo
// Create the project python project virtual environment
python -m venv .env
// Enable the project python project virtual environment
source .env/bin/activate

3.Install project dependencies

// Install the requests package
pip install requests
// Install the pytest package
pip install pytest
// Save the project dependencies to the requirements.txt file.
pip freeze > requirements.txt

4. Create new test files and test cases

// Create a new tests folder
mkdir tests
// Create a new test case file
cd tests
touch test_demo.py

5. Writing Test Cases

The test API can be referred to the demoAPI.md file in the project.

import requests

class TestPytestDemo:

    def test_get_demo(self):
        base_url = "https://jsonplaceholder.typicode.com"
        # SEND REQUEST
        response = requests.get(f"{base_url}/posts/1")
        # ASSERT
        assert response.status_code == 200
        assert response.json()['userId'] == 1
        assert response.json()['id'] == 1

    def test_post_demo(self):
        base_url = "https://jsonplaceholder.typicode.com"
        requests_data = {
            "title": "foo",
            "body": "bar",
            "userId": 1
        }
        # SEND REQUEST
        response = requests.post(f"{base_url}/posts", requests_data)
        # ASSERT
        assert response.status_code == 201
        print(response.json())
        assert response.json()['userId'] == '1'
        assert response.json()['id'] == 101

6.Run test cases

pytest

7.View test report

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8.Integration pytest-html-reporter test report

https://github.com/prashanth-sams/pytest-html-reporter

8.1 Install pytest-html-reporter dependency

pip install pytest-html-reporter

8.2 Configuring Test Report Parameters

  • Create a new pytest.ini file in the project root directory.
  • Add the following
[pytest]
addopts = -vs -rf --html-report=./report --title='PYTEST REPORT' --self-contained-html

8.3 Run test cases

pytest

8.4 Viewing the test report

The report is located in the report directory in the project root directory, use your browser to open the pytest_html_report.html file to view it.

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reference