Unit test in a nutshell

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Unit Test in a nutshellShort presentation of a method to verify isolated units of code


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Agile Coach eXtreme Programming Trainer !Certified Scrum Professional >30 years of coding (and still proudly counting) [email protected] linkedin.com/in/robertobettazzoni @bettazzoni

Roberto Bettazzoni

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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



unit test



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)


unit test



Test Isolation

B

D

C

A


Test Isolation

Run 4 tests: A, B, C, D

B

D

C

A


Test Isolation

B

D

C

A


Test Isolation

Run 3 tests: A, B, D

B

D

A


Test Isolation

Run 3 tests: D, A, B

B

D

A


unit test library

test()


unit test library

setup() - test() - teardown()


unit test library

{ setup() {} teardown() {} !

test_method_1() test_method_2() test_method_3() }

Test Class also known as TestCase or TestFixture


unit test library

setup() - test_method_1() - teardown()

Test Class also known as TestCase or TestFixture

setup() - test_method_2() - teardown()setup() - test_method_3() - teardown()


unit test



unit test - What is a unit of code?

Classes Methods Functions

Blocks of code


Code Isolation (or Unit Isolation)

B

D

C

A


Code Isolation (or Unit Isolation)

B

D

C

A


Take a guess

What makes a “good unit test”?


Take a guess

What makes a “good unit test”?

Readability


Food for thoughts

Date post:	14-Jul-2015
Category:	Software
Upload:	roberto-bettazzoni
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Unit test in a nutshell

Software