[Python + Unit Testing] Write Your First Python Unit Test with pytest

In this lesson you will create a new project with a virtual environment and write your first unit test with pytest. In doing so, you will learn:

install pytest
organize your project to support automated test discovery
setup Visual Code to use pytest as your test engine
best practice naming conventions for tests in Python

Install:

sudo apt install virtualenv

Create virtualenv inside project folder:

virtualenv -p /usr/local/bin/python3 .env

Source to the env:

source .env/bin/activate

Install the lib:

pip install pytest pylint

VSCode workspace settings:

{

    "python.pythonPath": "${workspaceFolder}/.env/bin/python",

    "python.unitTest.pyTestEnabled": true,

    "python.unitTest.pyTestArgs": [

        "--ignore=.env",

        "-s"

    ],

    "python.envFile": "${workspaceFolder}/.envFile"

}

Code to test:

import pytest

import common_math

class TestCommonMath(object):

    def test_add(self):

        result = common_math.add(1,2)

        assert result == 3

Testing code:

def add(num1, num2):

    return num1 + num2

巴特西

[Python + Unit Testing] Write Your First Python Unit Test with pytest

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