Refactoring Test Code for Improved Readability and Maintainability Refactor 4 #2
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Code Refactoring Summary
In the process of improving code quality and readability within our project, a significant redundancy was identified and addressed. This documentation outlines the changes made, particularly focusing on the optimization of test code for enhanced maintainability and clarity.
Background
Upon review, it was found that the creation of
mock
instances ofSecurityContextHolderStrategy
was consistently replicated across multiple test classes. These classes are as follows:AuthorizationManagerAfterMethodInterceptorTests
AuthorizationManagerBeforeMethodInterceptorTests
PreFilterAuthorizationMethodInterceptorTests
PostFilterAuthorizationMethodInterceptorTests
The mock creation process was identical in each instance, involving the setup of a
SecurityContextImpl
as the return value forgetContext()
. The repeated code snippet across eight test cases is shown below:This repetition not only decreased code readability due to the interspersion of other statements but also led to unnecessary duplication.
Solution
To eliminate this redundancy and improve code readability, a utility class named
MockSecurityContextHolderStrategy
was created. This class contains a static methodgetmock
that encapsulates the mock creation logic, thereby enabling reuse across the affected test cases. The implementation of thegetmock
method is as follows:Changes Made
Each of the eight test cases across the four specified test classes directly created a mock of
SecurityContextHolderStrategy
, interspersed with other statements, which cluttered the test code.The direct creation of mocks has been replaced with calls to
MockSecurityContextHolderStrategy.getmock(new SecurityContextImpl(authentication))
, significantly simplifying the test code and avoiding duplication.Impact
It exemplifies a step towards adhering to DRY (Don't Repeat Yourself) principles, making our codebase more efficient and easier to manage.