React Testing
What is a test?
-
a set of problems, questions, etc., for evaluating a person's abilities, skills, or performance
-
the means by which the quality of anything is determined
-
a trial of the quality of something
To test a software means to check if the software is doing what needs to be done
Automated Tests
An automated test is a software that tests your software
Test Types
(What)
Unit tests
Integration tests
end-to-end (aka e2e) tests
Test Types
(How)
Smoke tests
Black-box testing
White-box testing
Monkey testing
Costs
Test Automation Pyramid
Documentation
xUnit architecture
Kent Back created 'SUnit' for SmallTalk. From that first implementation a more generic architecture it's born
Test Runner
Test Case
Test fixtures
Test Suite
Assertions
Test result formatter
F.I.R.S.T.
Fast
Isolated
Repeatable
Self-Validating
Thorough
What to Test?
Low Hanging / Highest Value
Test Driven Development
Test Driven Development
Kent Beck has developed this technique and distilled it in his famous book "Test Driven Development: By Example" in 2003
Create a test case before start writing the code
Write the simplest code possible to pass that test
Iterate
Refactoring after each iteration
When you pick the next test try to write a test that will teach you something new
I really mean the simplest code ever possible...
During the Refactoring phase you can also delete unuseful tests
Why?
Better Design
YAGNI
You Aint Gonna Need It
Costs
ShuHaRi
ShuHaRi roughly translates to "first learn, then detach, and finally transcend."
Shu = "protect", "obey"
Ha = "detach", "digress"
Ri = "leave", "separate"
Graph By Ruma Dak
Graph By Pawel Brodzinski
