When you impelement method ‘equals’,

  • Post author:
  • Post category:
  • Post comments:0 Comments
  • Post last modified:January 27, 2005

When you unit-test your ‘equal’ method, you should all of following conditions.

The equals method implements an equivalence relation:

1. It is reflexive: for any reference value x, x.equals(x) should return true.
2. It is symmetric: for any reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
3. It is transitive: for any reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
4. It is consistent: for any reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false.
5. For any reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any reference values x and y, this method returns true if and only if x and y refer to the same object (x==y has the value true).

Author Details
Kubernetes, DevSecOps, AWS, 클라우드 보안, 클라우드 비용관리, SaaS 의 활용과 내재화 등 소프트웨어 개발 전반에 도움이 필요하다면 도움을 요청하세요. 지인이라면 가볍게 도와드리겠습니다. 전문적인 도움이 필요하다면 저의 현업에 방해가 되지 않는 선에서 협의가능합니다.
0 0 votes
Article Rating
Subscribe
Notify of
guest

This site uses Akismet to reduce spam. Learn how your comment data is processed.

0 Comments
Oldest
Newest Most Voted
Inline Feedbacks
View all comments