How to create custom assertions for collections in AssertJ

Question

There is an example on how to create custom assertions for custom classes in AssertJ :

http://joel-costigliola.github.io/assertj/assertj-core-custom-assertions.html

But what about collections of custom classes?

How to create assertions for them?

Answer 1

Two features exist for collection custom assertions :

• use a specific element comparator + standard assertions collections
• use a Condition to verify something on one or several collections elements

Hope it helps