title
Python Unit Testing With PyTest 1 - Getting started with pytest

description
In this Python Unit Testing With PyTest video I am going to show you : - What is Unit Testing - Advantages of unit testing - Available unit testing frameworks in python - How to install pytest using pip - write unit tests for our python script - run unit tests using pytest - commonly used pytest commands What is Unit Testing - According to wikipedia, unit testing is a software testing method by which individual units of source code are tested to determine whether they are fit for use. Why Unit Test? - Tests Reduce Bugs in New Features and Existing Features Tests Are Good Documentation Tests Reduce the Cost of Change Faster Debugging Faster Development Better Design Python Testing frameworks unittest - In the Python Standard Library nose - Not in the Standard Library. Simpler tests than unittest pytest - Not in the Python Standard Library. run with following command: pytest test_math_func.py -v or py.test #PythonTutorialforBeginners #ProgrammingKnowledge #PyTest #PythonCourse. ★★★Top Online Courses From ProgrammingKnowledge ★★★ Python Programming Course ➡️ http://bit.ly/2vsuMaS ⚫️ http://bit.ly/2GOaeQB Java Programming Course ➡️ http://bit.ly/2GEfQMf ⚫️ http://bit.ly/2Vvjy4a Bash Shell Scripting Course ➡️ http://bit.ly/2DBVF0C ⚫️ http://bit.ly/2UM06vF Linux Command Line Tutorials ➡️ http://bit.ly/2IXuil0 ⚫️ http://bit.ly/2IXukt8 C Programming Course ➡️ http://bit.ly/2GQCiD1 ⚫️ http://bit.ly/2ZGN6ej C++ Programming Course ➡️ http://bit.ly/2V4oEVJ ⚫️ http://bit.ly/2XMvqMs PHP Programming Course ➡️ http://bit.ly/2XP71WH ⚫️ http://bit.ly/2vs3od6 Android Development Course ➡️ http://bit.ly/2UHih5H ⚫️ http://bit.ly/2IMhVci C# Programming Course ➡️ http://bit.ly/2Vr7HEl ⚫️ http://bit.ly/2W6RXTU JavaFx Programming Course ➡️ http://bit.ly/2XMvZWA ⚫️ http://bit.ly/2V2CoAi NodeJs Programming Course ➡️ http://bit.ly/2GPg7gA ⚫️ http://bit.ly/2GQYTQ2 Jenkins Course For Developers and DevOps ➡️ http://bit.ly/2Wd4l4W ⚫️ http://bit.ly/2J1B1ug Scala Programming Tutorial Course ➡️ http://bit.ly/2PysyA4 ⚫️ http://bit.ly/2PCaVj2 Bootstrap Responsive Web Design Tutorial ➡️ http://bit.ly/2DFQ2yC ⚫️ http://bit.ly/2VoJWwH MongoDB Tutorial Course ➡️ http://bit.ly/2LaCJfP ⚫️ http://bit.ly/2WaI7Ap QT C++ GUI Tutorial For Beginners ➡️ http://bit.ly/2vwqHSZ ★★★ Online Courses to learn ★★★ Get 2 FREE Months of Unlimited Classes from skillshare - https://skillshare.eqcm.net/r1KEj Data Science - http://bit.ly/2lD9h5L | http://bit.ly/2lI8wIl Machine Learning - http://bit.ly/2WGGQpb | http://bit.ly/2GghLXX Artificial Intelligence - http://bit.ly/2lYqaYx | http://bit.ly/2NmaPya MERN Stack E-Degree Program - http://bit.ly/2kx2NFe | http://bit.ly/2lWj4no DevOps E-degree - http://bit.ly/2k1PwUQ | http://bit.ly/2k8Ypfy Data Analytics with R - http://bit.ly/2lBKqz8 | http://bit.ly/2lAjos3 AWS Certification Training - http://bit.ly/2kmLtTu | http://bit.ly/2lAkQL1 Projects in Java - http://bit.ly/2kzn25d | http://bit.ly/2lBMffs Machine Learning With TensorFlow - http://bit.ly/2m1z3AF | http://bit.ly/2lBMhnA Angular 8 - Complete Essential Guide - http://bit.ly/2lYvYRP Kotlin Android Development Masterclass - http://bit.ly/2GcblsI Learn iOS Programming Building Advance Projects - http://bit.ly/2kyX7ue ★★★ Follow ★★★ My Website - http://www.codebind.com DISCLAIMER: This video and description contains affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. This help support the channel and allows us to continue to make videos like this. Thank you for the support!

detail
{'title': 'Python Unit Testing With PyTest 1 - Getting started with pytest', 'heatmap': [{'end': 238.106, 'start': 211.689, 'weight': 0.725}, {'end': 593.191, 'start': 535.888, 'weight': 0.883}], 'summary': 'Tutorial series covers python unit testing with pytest, including benefits like bug reduction and cost savings. it explains creating functions for addition and multiplication, writing unit tests with pytest, and running tests with specific commands and options.', 'chapters': [{'end': 296.891, 'segs': [{'end': 85.76, 'src': 'embed', 'start': 56.846, 'weight': 0, 'content': [{'end': 60.951, 'text': "So let's say if you are writing a new feature in your code,", 'start': 56.846, 'duration': 4.105}, {'end': 68.496, 'text': 'unit tests can help you to reduce the bugs which may appears during the execution of your code.', 'start': 60.951, 'duration': 7.545}, {'end': 77.398, 'text': 'Now if you write good unit tests this serves as a good documentation for the person who is using your code.', 'start': 68.856, 'duration': 8.542}, {'end': 85.76, 'text': 'So because in unit test we are actually using the functions or the classes and testing them.', 'start': 78.018, 'duration': 7.742}], 'summary': 'Unit tests reduce bugs in code and serve as documentation for users.', 'duration': 28.914, 'max_score': 56.846, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A56846.jpg'}, {'end': 173.463, 'src': 'embed', 'start': 119.311, 'weight': 1, 'content': [{'end': 126.457, 'text': 'unit test helps in faster debugging and faster development of your program also.', 'start': 119.311, 'duration': 7.146}, {'end': 137.707, 'text': 'Because you have the idea of what should be the desired result, that means you can develop your code in a manner which is perfect for your tests.', 'start': 126.777, 'duration': 10.93}, {'end': 144.714, 'text': 'And at last but not the least, unit test helps us to better design our program.', 'start': 138.128, 'duration': 6.586}, {'end': 150.236, 'text': "Now let's talk about the unit testing frameworks which are available in Python.", 'start': 145.174, 'duration': 5.062}, {'end': 157.318, 'text': 'So I have listed here three top most unit testing frameworks which we can use to write our unit tests.', 'start': 150.416, 'duration': 6.902}, {'end': 166.781, 'text': 'So first module is unit test module and this unit test module is present in your Python standard library.', 'start': 158.078, 'duration': 8.703}, {'end': 173.463, 'text': "So you don't need to install any extra module in order to use this unit test module.", 'start': 167.261, 'duration': 6.202}], 'summary': 'Unit tests aid in faster debugging, development, and better program design. python has three main unit testing frameworks available, including the built-in unit test module.', 'duration': 54.152, 'max_score': 119.311, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A119311.jpg'}, {'end': 238.106, 'src': 'heatmap', 'start': 201.683, 'weight': 4, 'content': [{'end': 208.267, 'text': "so let's see how we can install pytest package on our operating system, on which we are working on.", 'start': 201.683, 'duration': 6.584}, {'end': 211.689, 'text': 'so you can install pytest using pip.', 'start': 208.267, 'duration': 3.422}, {'end': 222.896, 'text': 'so we are going to just write pip, install pytest and then press enter, which is going to install this pytest package on our operating system.', 'start': 211.689, 'duration': 11.207}, {'end': 226.398, 'text': 'so you can see pytest is now installed on my operating system.', 'start': 222.896, 'duration': 3.502}, {'end': 238.106, 'text': "so i'm going to give cls command to clear a terminal and then first of all i can give this pytest command and then hyphen h in order to get the help about PyTest.", 'start': 226.398, 'duration': 11.708}], 'summary': "Install pytest using pip and access help with 'pytest -h'.", 'duration': 24.715, 'max_score': 201.683, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A201683.jpg'}, {'end': 274.243, 'src': 'embed', 'start': 249.713, 'weight': 6, 'content': [{'end': 260.539, 'text': 'You just need to use the PyTest keyword and then you can give the options which are listed below and you can give the file or directory name or the list of files or directories.', 'start': 249.713, 'duration': 10.826}, {'end': 263.52, 'text': 'so, for example, the general options are given here.', 'start': 260.899, 'duration': 2.621}, {'end': 274.243, 'text': "so when you give this flag minus k or hyphen k, it's going to match the substring or the regular expression which you provide after this flag,", 'start': 263.52, 'duration': 10.723}], 'summary': 'Pytest uses the -k flag to match substring or regex after the flag.', 'duration': 24.53, 'max_score': 249.713, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A249713.jpg'}], 'start': 0.849, 'title': 'Python unit testing with pytest', 'summary': 'Covers python unit testing using pytest, highlighting benefits such as reducing bugs, serving as documentation, and reducing production costs. it also discusses unit testing frameworks in python and the installation and usage of pytest, including specific commands and options.', 'chapters': [{'end': 119.311, 'start': 0.849, 'title': 'Python unit testing with pytest', 'summary': 'Introduces python unit testing using pytest, explaining the concept and benefits, such as reducing bugs in new and existing features, serving as documentation, and reducing the cost of changes in production.', 'duration': 118.462, 'highlights': ['The chapter explains that unit testing is a software testing method by which individual units of source code are tested to determine whether they are fit to use or not.', 'The importance of unit testing is emphasized, highlighting that it reduces bugs in new and existing features, serves as documentation for the code, and reduces the cost of changes in production.', 'The benefits of writing good unit tests are outlined, including reducing bugs in new features, serving as documentation, and lowering the cost of changes in production.']}, {'end': 201.683, 'start': 119.311, 'title': 'Unit testing frameworks in python', 'summary': 'Discusses the benefits of unit testing, including faster debugging and development, improved program design, and lists the top three unit testing frameworks available in python: unit test module, nose module, and pytest framework.', 'duration': 82.372, 'highlights': ['Unit tests help in faster debugging and development, and better design of the program.', 'Listed top three unit testing frameworks in Python: unit test module, nose module, and PyTest framework.', 'PyTest is one of the most popular unit testing frameworks for Python.']}, {'end': 296.891, 'start': 201.683, 'title': 'Installing and using pytest', 'summary': "Explains the installation of pytest using pip and demonstrates the usage of pytest commands and options, including '-k' and '-m', to run tests with specific criteria and marks.", 'duration': 95.208, 'highlights': ["The chapter demonstrates the installation of pytest using pip, which allows users to simply run 'pip install pytest' to install the pytest package on their operating system.", "The usage of pytest commands and options, including '-k' and '-m', is explained, with examples of how to use them to match substrings or regular expressions and to test functions with specific marks.", "The chapter emphasizes the functionality of pytest commands '-k' and '-m' to match substrings or regular expressions and to test functions with specific marks, providing users with precise control over the tests to be executed."]}], 'duration': 296.042, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A849.jpg', 'highlights': ['Unit testing reduces bugs in new and existing features, serves as documentation, and lowers production costs.', 'PyTest is one of the most popular unit testing frameworks for Python.', 'Good unit tests reduce bugs in new features, serve as documentation, and lower production costs.', 'Unit testing helps in faster debugging and development, and better design of the program.', "The chapter demonstrates the installation of pytest using pip, allowing users to run 'pip install pytest' for installation.", 'Top three unit testing frameworks in Python: unit test module, nose module, and PyTest framework.', "Pytest commands '-k' and '-m' match substrings or regular expressions and test functions with specific marks."]}, {'end': 530.985, 'segs': [{'end': 374.323, 'src': 'embed', 'start': 297.171, 'weight': 0, 'content': [{'end': 306.076, 'text': 'So in here I have a Python script called math underscore func dot py file and inside this script I have two functions.', 'start': 297.171, 'duration': 8.905}, {'end': 317.181, 'text': 'One is a simple add function which adds two values and other is the product function which returns the value of the multiplication of two values.', 'start': 306.736, 'duration': 10.445}, {'end': 322.562, 'text': 'Now in order to write the unit test for these functions, I can create a new file.', 'start': 317.481, 'duration': 5.081}, {'end': 330.765, 'text': "So let me create a new Python file and I'm going to name it as test underscore math underscore func.", 'start': 322.602, 'duration': 8.163}, {'end': 339.967, 'text': 'So I have added this extra prefix here which is test underscore in front of the name of my file which is math func.', 'start': 331.085, 'duration': 8.882}, {'end': 342.408, 'text': "so I'm going to just create this file.", 'start': 340.547, 'duration': 1.861}, {'end': 348.35, 'text': 'so this test underscore prefix, which I have added in front of my Python script name,', 'start': 342.408, 'duration': 5.942}, {'end': 356.053, 'text': 'will help PyTest to recognize that this is the file in which the unit testing functions are written.', 'start': 348.35, 'duration': 7.703}, {'end': 367.678, 'text': "so it's going to go to that file and here we can first of all import the math func Python script and then we can define the test functions.", 'start': 356.053, 'duration': 11.625}, {'end': 374.323, 'text': 'So the test function you can define simply as you define any other function in your Python script.', 'start': 368.338, 'duration': 5.985}], 'summary': 'Python script has add and product functions. creating unit tests with pytest.', 'duration': 77.152, 'max_score': 297.171, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A297171.jpg'}, {'end': 424.204, 'src': 'embed', 'start': 399.567, 'weight': 2, 'content': [{'end': 406.975, 'text': 'So I can use a special keyword which is assert and then you can call your function in your Python script.', 'start': 399.567, 'duration': 7.408}, {'end': 417.38, 'text': "So math func dot, add function, and here as an argument, I'm going to provide two numbers, let's say 7 and 3, which is going to give us the result 10.", 'start': 406.995, 'duration': 10.385}, {'end': 424.204, 'text': 'so we are going to just check whether this function is returning 10 or not, and this is called assertion.', 'start': 417.38, 'duration': 6.824}], 'summary': "Using 'assert' keyword to check if math function returns 10 with input 7 and 3.", 'duration': 24.637, 'max_score': 399.567, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A399567.jpg'}, {'end': 503.733, 'src': 'embed', 'start': 475.18, 'weight': 4, 'content': [{'end': 486.189, 'text': 'so in this way you can provide multiple asserts inside your function, whatever you think will come as an expected result of your function.', 'start': 475.18, 'duration': 11.009}, {'end': 490.99, 'text': "So I'm going to define the second function, which is test product.", 'start': 486.949, 'duration': 4.041}, {'end': 493.811, 'text': "And once again, I'm going to pass no argument here.", 'start': 491.29, 'duration': 2.521}, {'end': 503.733, 'text': 'And once again, I can just use this assert keyword and then the name of my library, which is math func dot the function.', 'start': 494.031, 'duration': 9.702}], 'summary': 'Demonstrates defining and testing multiple asserts in a function.', 'duration': 28.553, 'max_score': 475.18, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A475180.jpg'}], 'start': 297.171, 'title': 'Unit testing python functions and testing functions in python', 'summary': 'Covers creating python functions for addition and multiplication, writing unit tests using pytest, and testing functions in python with assertions to validate the add and product functions of a math library. it includes examples of expected results and default parameter values.', 'chapters': [{'end': 374.323, 'start': 297.171, 'title': 'Unit testing python functions', 'summary': 'Discusses creating python functions for addition and multiplication, writing unit tests using pytest, and importing the math func python script for testing.', 'duration': 77.152, 'highlights': ["PyTest recognizes unit testing functions in a file with 'test_' prefix added to the Python script name, facilitating the identification and execution of unit tests.", 'The script contains two functions: an add function that adds two values and a product function that returns the multiplication of two values.', "Creating a new Python file with 'test_' prefix before the script name allows for the writing of unit testing functions for the math func Python script."]}, {'end': 530.985, 'start': 374.724, 'title': 'Testing functions in python', 'summary': 'Explains how to write test functions with assertions in python to validate the add and product functions of a math library, including examples of expected results and default parameter values.', 'duration': 156.261, 'highlights': ['The chapter explains how to write test functions with assertions in Python, including examples of expected results and default parameter values.', 'The function test_add is used to validate the add function of a math library by providing assertions for different input values, such as 7 and 3, and verifying the expected result.', 'The function test_product is created to test the product function of the math library and includes assertions for input values like 5, as well as handling default parameter values.']}], 'duration': 233.814, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A297171.jpg', 'highlights': ["PyTest recognizes unit testing functions in a file with 'test_' prefix", 'The script contains two functions: an add function and a product function', 'The chapter explains how to write test functions with assertions in Python', "Creating a new Python file with 'test_' prefix allows writing unit testing functions", 'The function test_add validates the add function of a math library with assertions', 'The function test_product is created to test the product function of the math library']}, {'end': 909.931, 'segs': [{'end': 659.157, 'src': 'heatmap', 'start': 535.888, 'weight': 0, 'content': [{'end': 542.913, 'text': "so once we have written our unit tests, let's try to run these tests using pi test.", 'start': 535.888, 'duration': 7.025}, {'end': 548.096, 'text': 'so first of all i need to go to the directory where this test script is there.', 'start': 542.913, 'duration': 5.183}, {'end': 554.841, 'text': "so i'm going to just copy the path and then go to the terminal and i'm going to cd to this path which i have copied,", 'start': 548.096, 'duration': 6.745}, {'end': 559.684, 'text': 'and let me just remove the script name from here and then press enter.', 'start': 555.581, 'duration': 4.103}, {'end': 569.751, 'text': "so now i'm in the folder where my math func dot py is there and test underscore math, underscore func dot py file is there.", 'start': 559.684, 'duration': 10.067}, {'end': 579.877, 'text': 'so in order to run your unit test file, you just need to give this command pi test and the name of your test file, which is test underscore math,', 'start': 569.751, 'duration': 10.126}, {'end': 583.22, 'text': 'underscore func dot py in my case,', 'start': 579.877, 'duration': 3.343}, {'end': 593.191, 'text': "and then i'm going to press enter And you can see it's going to give me two passed in whatever time it took to execute these two tests.", 'start': 583.22, 'duration': 9.971}, {'end': 601.722, 'text': "So because we have written two tests here for two functions, it's going to show us this result which is two passed.", 'start': 593.651, 'duration': 8.071}, {'end': 605.444, 'text': "let's say we are going to expect some unexpected value.", 'start': 602.202, 'duration': 3.242}, {'end': 614.348, 'text': "so here we have written some wrong value which we are expecting, and now, when we run our test, it's going to fail.", 'start': 605.444, 'duration': 8.904}, {'end': 622.953, 'text': 'you can see one passed and one failed, and pytest will also give you the information about the assertion failure.', 'start': 614.348, 'duration': 8.605}, {'end': 629.617, 'text': 'so the assertion failure is happened at this assertion where you are just testing.', 'start': 622.953, 'duration': 6.664}, {'end': 634.12, 'text': '10 is equal to 18, which is wrong here.', 'start': 629.617, 'duration': 4.503}, {'end': 636.602, 'text': 'so once again, we are going to correct this.', 'start': 634.12, 'duration': 2.482}, {'end': 641.986, 'text': "also, let's say, some developer has changed the function which you are testing.", 'start': 636.602, 'duration': 5.384}, {'end': 650.212, 'text': "so instead of returning the addition now, i'm going to return the subtraction, which is going to break the test now.", 'start': 641.986, 'duration': 8.226}, {'end': 659.157, 'text': "so i'm going to run the test once again and once again it's going to give you the error, and this time it's going to show us that the result is 4,", 'start': 650.212, 'duration': 8.945}], 'summary': 'Unit tests run using pytest, showing 2 passed and 1 failed test.', 'duration': 128.172, 'max_score': 535.888, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A535888.jpg'}, {'end': 801.367, 'src': 'embed', 'start': 770.913, 'weight': 3, 'content': [{'end': 774.857, 'text': "so let's say we just write tes underscore, add.", 'start': 770.913, 'duration': 3.944}, {'end': 785.248, 'text': "so there is no test prefix in front of your function and once again i'm going to give the same command and you will see only one test is recognized,", 'start': 774.857, 'duration': 10.391}, {'end': 793.237, 'text': "which is test underscore product, and this is because we haven't provided that test prefix in front of the function.", 'start': 785.248, 'duration': 7.989}, {'end': 801.367, 'text': 'so in order to recognize this function as a unit test, you need to give the test keyword as the prefix of your unit test function,', 'start': 793.237, 'duration': 8.13}], 'summary': 'To recognize a function as a unit test, use the test keyword as the prefix.', 'duration': 30.454, 'max_score': 770.913, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A770913.jpg'}, {'end': 898.632, 'src': 'embed', 'start': 871.213, 'weight': 5, 'content': [{'end': 877.817, 'text': 'because we are specifically giving the file name in which our tests are there.', 'start': 871.213, 'duration': 6.604}, {'end': 885.301, 'text': "So if you want to run your test inside some file which doesn't have the test prefix in front of it,", 'start': 878.117, 'duration': 7.184}, {'end': 889.644, 'text': 'you can just use pytest command and then give the name of the file,', 'start': 885.301, 'duration': 4.343}, {'end': 894.927, 'text': 'and pytest is going to recognize that this is the file in which your unit tests are there.', 'start': 889.644, 'duration': 5.283}, {'end': 898.632, 'text': 'And it will run all the unit test in this file.', 'start': 895.588, 'duration': 3.044}], 'summary': 'Pytest recognizes unit tests by file names, simplifying test execution.', 'duration': 27.419, 'max_score': 871.213, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A871213.jpg'}], 'start': 530.985, 'title': 'Running and writing unit tests with pytest', 'summary': "Covers running unit tests using pytest, where a test script with a function that yields 7 is expected to return 14, and the process involves navigating to the directory and using the command 'pytest test_math_func.py'. it also details the process of writing unit tests using pytest, demonstrating test execution, failure, and correction, highlighting the need for test prefix and file naming conventions to recognize unit testing files, and provides insights into using pytest for test execution.", 'chapters': [{'end': 583.22, 'start': 530.985, 'title': 'Running unit tests with pytest', 'summary': "Covers running unit tests using pytest, where a test script with a function that yields 7 is expected to return 14, and the process involves navigating to the directory and using the command 'pytest test_math_func.py'.", 'duration': 52.235, 'highlights': ["Running unit tests using Pytest involves navigating to the directory and using the command 'pytest test_math_func.py'", 'Expecting the result 14 when the function yields 7', 'Navigating to the directory where the test script is located']}, {'end': 909.931, 'start': 583.22, 'title': 'Pytest unit testing', 'summary': 'Details the process of writing unit tests using pytest, demonstrating test execution, failure, and correction, highlighting the need for test prefix and file naming conventions to recognize unit testing files, and provides insights into using pytest for test execution.', 'duration': 326.711, 'highlights': ['Pytest recognizes and executes two unit tests, displaying two passed results for two functions, demonstrating successful test execution.', 'Pytest detects an assertion failure, highlighting the importance of accurate test expectations, with one passed and one failed result.', "Changing the tested function's behavior results in a test failure, emphasizing the impact of code changes on test outcomes.", "The significance of test prefix 'test_' for function recognition is demonstrated, as Pytest only recognizes functions with this prefix as unit tests.", "Pytest's ability to recognize and execute unit tests within a file, even without the test prefix, is showcased, emphasizing the flexibility of test file naming conventions."]}], 'duration': 378.946, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/_QtM7QGuj1A/pics/_QtM7QGuj1A530985.jpg', 'highlights': ['Pytest recognizes and executes two unit tests, displaying two passed results for two functions, demonstrating successful test execution.', 'Expecting the result 14 when the function yields 7', 'Pytest detects an assertion failure, highlighting the importance of accurate test expectations, with one passed and one failed result.', "The significance of test prefix 'test_' for function recognition is demonstrated, as Pytest only recognizes functions with this prefix as unit tests.", "Changing the tested function's behavior results in a test failure, emphasizing the impact of code changes on test outcomes.", "Pytest's ability to recognize and execute unit tests within a file, even without the test prefix, is showcased, emphasizing the flexibility of test file naming conventions.", "Running unit tests using Pytest involves navigating to the directory and using the command 'pytest test_math_func.py'", 'Navigating to the directory where the test script is located']}], 'highlights': ['Unit testing reduces bugs, serves as documentation, and lowers costs', 'PyTest is a popular unit testing framework for Python', 'Good unit tests reduce bugs, serve as documentation, and lower costs', 'Unit testing helps in faster debugging, development, and better program design', 'Demonstrates installation of pytest using pip for installation', 'Top three unit testing frameworks in Python: unit test, nose, and PyTest', "Pytest commands '-k' and '-m' match substrings or regular expressions", "PyTest recognizes unit testing functions with 'test_' prefix", 'The script contains two functions: an add function and a product function', 'Explains how to write test functions with assertions in Python', "Creating a new Python file with 'test_' prefix allows writing unit testing functions", 'Pytest recognizes and executes two unit tests, displaying two passed results', 'Pytest detects an assertion failure, highlighting the importance of accurate test expectations', "The significance of test prefix 'test_' for function recognition is demonstrated", "Changing the tested function's behavior results in a test failure", "Pytest's ability to recognize and execute unit tests within a file, even without the test prefix, is showcased", "Running unit tests using Pytest involves navigating to the directory and using the command 'pytest test_math_func.py'", 'Navigating to the directory where the test script is located', 'The function test_add validates the add function of a math library with assertions', 'The function test_product is created to test the product function of the math library', 'Expecting the result 14 when the function yields 7']}