Assert that every object property matches given predicate in kotlin test

Question

I have a collection of objects:

data class WeatherForecast(
    val city: String,
    val forecast: String
    // ...
)

I would like to test that each and every item matches given predicate on field.

Is there any assertion in kotlintest assertions that will allow me to do so?

Something like:

 forecasts.eachItemshouldMatch{ it.forecast == "SUNNY" }

As far as I can see in the [documentation](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/) of `kotlin.test` there seems to be no way to collect the result of multiple assertions. With JUnit5 you would be able to use `assertAll`. — Endzeit, Nov 27 '21 at 00:02

score 2 · Accepted Answer · answered Dec 01 '21 at 02:37

2

What about using an inspector.

list.forAll {
  it.forecast shouldBe "SUNNY"
}

answered Dec 01 '21 at 02:37

sksamuel

score -2 · Answer 2 · answered Nov 26 '21 at 22:38

-2

You can simply use the all function; i.e.:

forecasts.all { it.forecast == "SUNNY" }

answered Nov 26 '21 at 22:38

Schottky

I would like to have information from the assertion on which items did not met the criteria – pixel Nov 26 '21 at 23:01
1

Is `forecasts.filterNot()` would satisfy your expectations @pixel? – Putra Nugraha Nov 27 '21 at 01:53

2 Answers2