How to Write Assertions in Python Testing
Assertion is nothing but validating the output against a known response. i.e. in above code, we have passed the list containing 3 values namely 10, 20 and 30, and we know that its multiplication result is 6000. So as a last step in code, we will be writing assertion code and above code comes up with assertEqual and surely it will give the output as 6000 and hence the testcase passes.
unittest has lots of methods to assert on the values, types, and existence of variables. Below are some of the methods that are commonly used to write assertions.
Method | Description |
---|---|
.assertEqual(a, b) | Checks if |
.assertTrue(x) | Asserts that the boolean value of |
.assertIsInstance(a, b) | Asserts that |
.assertIsNone(x) | Ensures that |
.assertFalse(x) | Asserts that the boolean value of |
.assertIs(a, b) | Verifies if |
.assertIn(a, b) | Checks if |
Getting Started With Unit Testing in Python
In Python, unit tests are the segments of codes that are written to test other modules and files that we refer to as a unit. Python Unit Testing is a very important part of the software development process that helps us to ensure that the code works properly without any errors. In this article, we will learn about Python Testing with the help of examples and proper explanations.
Table of Content
- What is Python Unit Testing?
- The Assert Statement
- Implementing Unit Tests | Unittest
- Implementing Unit Tests | Pytest
- Implementing Unit Tests | Nose
- Implementing Unit Tests | Doctest
- How to Write Assertions in Python Testing
- More Advanced Testing Scenarios
- Automating the Execution of Tests