Why are my sets of data objects not equal?

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3

assertEquals compares these sets as equal in the code like yours, same as the equality operator.

import kotlin.test.assertEquals

fun main(args: Array<String>) {
//sampleStart
    data class OtherType(val value: String) {}
    class MyType {
        var values : MutableSet<OtherType> = mutableSetOf()
    }
    val myValue = "test"
    val myObject = MyType().apply { values.add(OtherType(myValue)) }
    
    println(setOf(OtherType(myValue))::class)
    println(myObject.values::class)
    println(setOf(OtherType(myValue)) == myObject.values)
    assertEquals(setOf(OtherType(myValue)), myObject.values)
//sampleEnd
}

So the reason why you see the other result must be something else.

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