AssertJ: negating isEqualToComparingFieldByFieldRecursively

Question

I have this code for checking if an object is equals to another one comparing all fields recursively using JUnit 5 and AssertJ:

assertThat(financialDataContainer2.getStandardisedBooking())
    .isEqualToComparingFieldByFieldRecursively(initialBooking);

How can you have an assertion in AssertJ which is the negation of this one? Basically I want to be able to check if two objects are not equal by comparing recursively all fields.

You want to assert that all fields are different or at least one field is ? — davidxxx, Jun 15 '18 at 08:24
@davidxxx The method `isEqualToComparingFieldByFieldRecursively` checks all fields for equality. If one field is not equal, then it returns false. Inverting this logic: if at least one single field is not equal then the implementation I am targeting should return true. So: "at least one field is". — gil.fernandes, Jun 15 '18 at 08:32

Joachim Lous · Answer 1 · 2019-05-16T07:40:17.400

1

See my answer to How do I negate assertions in AssertJ?

In your case the code would be:

assertThat(Collections.singleton(actual)).noneSatisfy(actual -> 
  assertThat(actual).isEqualToComparingFieldByFieldRecursively(unexpected)
);

edited May 16 '19 at 07:40

answered May 16 '19 at 07:25

Joachim Lous

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AssertJ: negating isEqualToComparingFieldByFieldRecursively

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