Unit test in a nutshell

Unit Test in a nutshell
Short presentation of a method to verify isolated units of code
agile42 | We advise, train and coach companies building software | www.agile42.com | Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License

About me
Roberto Bettazzoni
Agile Coach
eXtreme Programming Trainer
!
Certified Scrum Professional
>30 years of coding (and still proudly counting)
!
roberto.bettazzoni@agile42.com
linkedin.com/in/robertobettazzoni
@bettazzoni

unit test
Method to verify isolated units of code

unit test
user
code
Acceptance Criteria test
Functional test
Unit test
Unit tests are written
by coders for coders
to test the code design

unit test
assert( condition )

unit test library
assert( bool condition )
assertEqual( <T> a, <T> b )
assertEqual( float a, float b, float precision)
assertThrow( exceptionType, function)

Test Isolation
A
B
C
D

Test Isolation
Run 4 tests: A, B, C, D
A
B
C
D

Test Isolation
Run 3 tests: A, B, D
A
B
D

Test Isolation
Run 3 tests: D, A, B
D
A
B

unit test library
test()

unit test library
setup() - test() - teardown()

unit test library
Test Class also known as TestCase or TestFixture
{
setup() {}
teardown() {}
!
test_method_1()
test_method_2()
test_method_3()
}

unit test library
Test Class also known as TestCase or TestFixture
setup() - test_method_1() - teardown()

unit test - What is a unit of code?
Classes
Methods
Functions
Blocks of code

Code Isolation (or Unit Isolation)
A
B
C
D

Take a guess
What makes a “good unit test”?

Take a guess
What makes a “good unit test”?
Readability

Food for thoughts

Unit test in a nutshell

More Related Content

What's hot

Similar to Unit test in a nutshell

More from Roberto Bettazzoni

Recently uploaded

Unit test in a nutshell