{"id":3685,"date":"2022-07-06T00:57:27","date_gmt":"2022-07-06T00:57:27","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=3685"},"modified":"2022-07-09T07:47:52","modified_gmt":"2022-07-09T07:47:52","slug":"python-unittest-subtest","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-unit-testing\/python-unittest-subtest\/","title":{"rendered":"Python unittest subtest"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to define parameterized tests using unittest<\/a>‘s subTest()<\/code> context manager.<\/p>\n\n\n\n

Introduction to the unittest subtest context manager #<\/a><\/h2>\n\n\n\n

First, create a new module<\/a> called pricing.py<\/code> and define a calculate()<\/code> function as follows:<\/p>\n\n\n

def<\/span> calculate<\/span>(price, tax=0<\/span>, discount=0<\/span>)<\/span>:<\/span>\n    return<\/span> round((price - discount) * (1<\/span>+tax), 2<\/span>)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
The calculate()<\/code> function calculates the net price from the price, tax, and discount.<\/p>\n\n\n\n
Second, create the test_pricing.py<\/code> test module to test the calculate()<\/code> function:<\/p>\n\n\n
import<\/span> unittest\n\nfrom<\/span> pricing import<\/span> calculate\n\n\nclass<\/span> TestPricing<\/span>(unittest.TestCase)<\/span>:<\/span>\n    def<\/span> test_calculate<\/span>(self)<\/span>:<\/span>\n        pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
To test the calculate()<\/code> function, you need to come up with multiple test cases, for example:<\/p>\n\n\n\n