Show Menu

Unit testing in Python Cheat Sheet by

python     testing

Unit testin­g/TDD basics

Unit testing is an Agile/­Con­tinuous Integr­ation principle
Write tests before or during coding
Writing tests before == detailed requir­ements
Writing tests during == no over-c­oding
Unit testing assures code pre- and post-r­efa­ctoring behaves the same
Passed unit tests == CYA
Shared unit tests during sprints, for example, make it less likely that commits would break others' code
 

A test case:

* answers a single question

* runs by itself - automation

* determines by itself whether pass or fail (i.e. no human involv­­ement)

* runs in isolation from other test cases
http:­­//­w­­ww.d­Â­­iv­­ei­n­­top­Â­y­th­­on.n­­et­Â­/­un­­it­_­­tes­Â­t­in­­g/­d­­ivi­Â­n­g_­­in.h­tml
 

Unit testing in Python

my_t­est­_th­ing.py:

import unittest

# inherit from TestCase
# (a TestCase is a test fixture)
class MyTest­(un­itt­est.Te­stC­ase):
.....# method name starts with "­tes­t"!
.....def testMe­tho­d(s­elf):
..........se­lf.a­ss­ert­Equ­al(­4,3­,"4 not equal to 3")

if __name__ == "­__m­ain­__":
.....# called when exec from CL
.....u­nit­tes­t.m­ain()

------­­--­-­-­--­­---­­--­-­-­--­­---­­--­-­-­--­­---­--

calling from CL:
python my_tes­t_t­hin­g.py
prints
FAIL: testMethod (__mai­n__.My­Test)
-----­-­-­--­­---­­--­-­-­--­­---­­--­-­-­--­­---­­--­-­--
Traceback (most recent call last):
File "­my_­tes­t_t­hin­g.p­y", line 6,
in testMe­thod
self.a­sse­rtE­qua­l(1­0,1­1,"10 != 11")
Assert­ion­Error: 10 != 11
-----­---­---­---­---­---­---­---­---­----
Ran 1 test in 0.000s
FAILED (failu­res=1)
indicates tab: "....."

Download the Unit testing in Python Cheat Sheet

1 Page
//media.cheatography.com/storage/thumb/metamad_unit-testing-in-python.750.jpg

PDF (recommended)

Alternative Downloads

Share This Cheat Sheet!

Like this cheat sheet? Check out our sponsors!

Readability-Score.com is a collection of tools to make your writing better. More readabile content means higher conversion rates and better reader engagement. Measure website and document readability, measure keyword density and more!

Click Here To Get Started!

 

Comments

No comments yet. Add yours below!

Add a Comment

Your Comment

Please enter your name.

    Please enter your email address

      Please enter your Comment.

          Related Cheat Sheets

          jasmine JS testing Cheat Sheet
          Web Programming Cheat Sheet