Unit Testing (UT)

Unit Testing definition

Unit Testing is a Practice of testing certain functions and areas of code or individual units of source code :
- Unit Tests is a test that isolates and verifies individual units of source code.
- A Unit test is a way of testing a unit (the smallest piece of code) that can be logically isolated in a system.Unit Testing benefits

Unit Testing benefits

Unit Testing characteristics

Code in each test is as small as possible while maintaining readability of the code.
Each test is independent of other unit tests.
They exercise the persistence layer of a solution.
Each test makes assertions about only one logical concept.

Unit Testing practice

Unit Testing is performed by Developers
Code in each Unit test should be as small as possible while maintaining readability of the code.
- Low-level test focusing on small parts of a software system that can be executed fast and in isolation.
- The definition and boundaries of a ‘unit’ generally depends on the context and is to be agreed by all the Developers
- In most programming languages, that is a function, a subroutine, a method or property.
A Unit test can be automated.

Good Unit Test

A unit test is a separated and isolated test that validates a unit of functionality.
A good unit test should have the following characteristics:
- A unit test does not depend on the environment
  • Does not depend on the environment; e.g. it will run on your computer and it will run on your colleague’s computer
Each Unit test should be independent of other unit tests.
- Does not depend on other unit tests
Does not depend on external data
Does not have side effects
Asserts the results of code
Tests a single unit of work (mostly a method)
Covers all the paths of the code under test
Tests and asserts edge cases and different ranges of data
Runs fast
Is well‐factored and as small as possible

Good Unit Test Attributes

More informations for Scrum Testing

More informations for the Scrum PSD certification here.