How to compare recursively ignoring given fields using assertJ?

java unit-testing assertj
Tarun Maganti picture Tarun Maganti · Apr 10, 2017 · Viewed 19.1k times · Source

AssertJ has isEqualToIgnoringGivenFields and isEqualToComparingFieldByFieldRecursively.

But, there is no way I can compare two objects recursively by ignoring some fields. As per this discussion, it must be in development.

How to still get my assert's return value to be compared recursively but ignoring some fields. Is it possible in any other library or can I do it somehow using AssertJ?

Answer

Ovidiu Nistor picture Ovidiu Nistor · Mar 10, 2019

With latest 'Recursive comparison api improvements' from AssertJ release 3.12.0 it's possible now to do a recursive comparison and ignore fields:

Assertions.assertThat(objActual)
                .usingRecursiveComparison()
                .ignoringFields("uniqueId", "otherId")
                .ignoringFieldsMatchingRegexes(".*someId")
                .ignoringOverriddenEqualsForTypes(MyData.class, MyDataItem.class)
                .isEqualTo(objExpected);

Related questions

Can you add a custom message to AssertJ assertThat?

We have a test suite that primarily uses JUnit assertions with Hamcrest matchers. One of our team started experimenting with AssertJ and impressed people with its syntax, flexibility and declarative-ness. There is one feature that JUnit provides that I can't …

Read More
Testing content of list ignoring some of the fields

I have a scenario where I receive a list from a method call and I would like to assert that the list contains the correct elements. One way to do this would be to look for some detail in each …

Read More
How do I test a private function or a class that has private methods, fields or inner classes?

How do I unit test (using xUnit) a class that has internal private methods, fields or nested classes? Or a function that is made private by having internal linkage (static in C/C++) or is in a private (anonymous) namespace? …

Read More