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What is Unit Testing - Coggle Diagram

- - - - Kent Beck: Test-Driven Development: By Example (Addison-Wesley
        Professional, 2002)
    - - It's not the code that needs to be tested in an isolated manner. Instead, unit test themselves should be run in isolation each other.
        
        definition
        
        Dependencies
        
        Shared
        
        shared between tests and provides means for those tests to affect each other’s outcome
        
        Private
        
        Not Shared
        
        Out-Of-Process
  - - - Growing ObjectOriented Software, Guided by Tests (Addison-Wesley Professional, 2009)
    - - If the class has a dependency on another class, or serval classes, you need to replace all such dependencies with a test double
        
        Definition
        
        Test Double
        
        A test double is an object that looks and behaves like its release intended counterpart but is actually a simplified version that reduces the
        complexity and facilitates testing.
        
        Types
        
        Mock
        
        A mock is a special kind of test double that allows you to examine interactions between the system under test and its collaborators
        
        Only Mock the mutable objest
        
        AAA
        
        Arrange, act and Assert
        
        SUT
        
        System Under Test
        
        MUT
        
        Method Under Test