lets say i have a list of objects and assert on it if i know

Question

lets say i have a list of objects and assert on it if i know all the field values its easy ```import strikt api expectThat import strikt assertions containsExactly data class Person val name String val age Int expectThat listOf Person james 28 Person jimmy 28 containsExactly Person james 28 Person jimmy 28 ``` but what if there is a third field that is random and that i can t assert on what would be the best way to write that in strikt ```data class Person val name String val age Int val weight Double=Random nextDouble ``` i want all the elements and the order but not assert on weight

christophsturm · Answer

I think what i want is ```expectThat listOf Person james 28 Person jimmy 28 containsExactly obj get name isEqualTo james get age isEqualTo 28 obj get name isEqualTo jim get age isEqualTo 28 ```

christophsturm · Answer

i mean what i really want is ```expectThat listOf Person james 28 Person jimmy 28 containsExactly listOf Person james 28 Person jimmy 28 ignore=Person weight ```

robfletcher · Answer

Part of me wonders why such a property would be part of the `equals` implementation on the class if it really doesn t represent logical equality i e is it the test that needs to change or is the difficulty in implementing the test telling you something about the design

robfletcher · Answer

I was wondering if Kotlin data classes ignore ` Transient` fields in their `equals` implementation but apparently not

christophsturm · Answer

thinking of it more thats actually a good point I thought that i don t want to assert on all the fields because the data class contains a lot of values and I don t want to assert on all of them in one test but I can just map to one unique field in the tests that test the order and test the other fields separately in tests with just one result

robfletcher · Answer

I d like to implement `isOrdered ` and `isOrderedBy Comparator ` assertions

christophsturm · Answer

but in my case its ordered by its position in the file slightly smiling face

christophsturm · Answer

```expectThat listOf Person james 28 Person jimmy 28 map it copy weight= gt null containsExactly listOf Person james 28 Person jimmy 28 ``` this could work btw but you are right its just not a great test

robfletcher · Answer

I forgot Strikt already has `fun lt T Collection lt E gt E gt Builder lt T gt isSorted comparator Comparator lt E gt ` I m adding `fun lt T Collection lt E gt E Comparable lt E gt gt Builder lt T gt isSorted ` now