Mark objects as data objects in tests

example/src/main/kotlin/com/github/michaelbull/result/example/model/domain/DomainMessage.kt

@@ -3,29 +3,29 @@ package com.github.michaelbull.result.example.model.domain
 /**
  * All possible things that can happen in the use-cases
  */
-sealed class DomainMessage
+sealed interface DomainMessage
 
 /* validation errors */
 
-object CustomerRequired : DomainMessage()
+data object CustomerRequired : DomainMessage
-object CustomerIdMustBePositive : DomainMessage()
+data object CustomerIdMustBePositive : DomainMessage
 
-object FirstNameRequired : DomainMessage()
+data object FirstNameRequired : DomainMessage
-object FirstNameTooLong : DomainMessage()
+data object FirstNameTooLong : DomainMessage
 
-object LastNameRequired : DomainMessage()
+data object LastNameRequired : DomainMessage
-object LastNameTooLong : DomainMessage()
+data object LastNameTooLong : DomainMessage
 
-object EmailRequired : DomainMessage()
+data object EmailRequired : DomainMessage
-object EmailTooLong : DomainMessage()
+data object EmailTooLong : DomainMessage
-object EmailInvalid : DomainMessage()
+data object EmailInvalid : DomainMessage
 
 /* exposed errors */
 
-object CustomerNotFound : DomainMessage()
+data object CustomerNotFound : DomainMessage
 
 /* internal errors */
 
-object SqlCustomerInvalid : DomainMessage()
+data object SqlCustomerInvalid : DomainMessage
-object DatabaseTimeout : DomainMessage()
+data object DatabaseTimeout : DomainMessage
-class DatabaseError(val reason: String?) : DomainMessage()
+data class DatabaseError(val reason: String?) : DomainMessage

example/src/main/kotlin/com/github/michaelbull/result/example/model/domain/Event.kt

@@ -1,8 +1,8 @@
 package com.github.michaelbull.result.example.model.domain
 
-sealed class Event
+sealed interface Event
 
-object Created : Event()
+data object Created : Event
-class FirstNameChanged(val old: String, val new: String) : Event()
+data class FirstNameChanged(val old: String, val new: String) : Event
-class LastNameChanged(val old: String, val new: String) : Event()
+data class LastNameChanged(val old: String, val new: String) : Event
-class EmailAddressChanged(val old: String, val new: String) : Event()
+data class EmailAddressChanged(val old: String, val new: String) : Event

kotlin-result-coroutines/src/jvmTest/kotlin/com/github/michaelbull/result/coroutines/binding/AsyncSuspendableBindingTest.kt

@@ -18,8 +18,8 @@ import kotlin.test.assertTrue
 class AsyncSuspendableBindingTest {
 
     private sealed class BindingError {
-        object BindingErrorA : BindingError()
+        data object BindingErrorA : BindingError()
-        object BindingErrorB : BindingError()
+        data object BindingErrorB : BindingError()
     }
 
     @Test

kotlin-result/src/commonTest/kotlin/com/github/michaelbull/result/GetTest.kt

@@ -148,9 +148,9 @@ class GetTest {
     }
 
     class Merge {
-        interface Direction
+        sealed interface Direction
-        object Left : Direction
+        data object Left : Direction
-        object Right : Direction
+        data object Right : Direction
 
         @Test
         fun returnsValueIfOk() {