Remove equals and hashCode overrides from NonEmptyList

arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/NonEmptyList.kt

@@ -205,19 +205,6 @@ public class NonEmptyList<out A>(
   public fun extract(): A =
     this.head
 
-  override fun equals(other: Any?): Boolean {
-    if (this === other) return true
-    other?.let {
-      if (it::class != this::class) return false
-      (other as NonEmptyList<*>)
-      if (all != other.all) return false
-      return true
-    } ?: return false
-  }
-
-  override fun hashCode(): Int =
-    all.hashCode()
-
   override fun toString(): String =
     "NonEmptyList(${all.joinToString()})"
 

arrow-libs/core/arrow-core/src/commonTest/kotlin/arrow/core/NonEmptyListTest.kt

@@ -3,6 +3,8 @@ package arrow.core
 import arrow.core.test.UnitSpec
 import arrow.core.test.laws.SemigroupLaws
 import arrow.typeclasses.Semigroup
+import io.kotest.assertions.withClue
+import io.kotest.matchers.booleans.shouldBeTrue
 import io.kotest.property.Arb
 import io.kotest.matchers.shouldBe
 import io.kotest.property.arbitrary.boolean
@@ -298,7 +300,6 @@ class NonEmptyListTest : UnitSpec() {
       }
     }
 
-
     "minBy element" {
       checkAll(
         Arb.nonEmptyList(Arb.int())
@@ -308,5 +309,16 @@ class NonEmptyListTest : UnitSpec() {
         result shouldBe expected
       }
     }
+
+    "NonEmptyList equals List" {
+      checkAll(
+        Arb.nonEmptyList(Arb.int())
+      ) { a ->
+        withClue("$a should be equal to ${a.all}") {
+          // You can't use `shouldBe` here because it doesn't use the `equals` methods on `Iterable`
+          (a == a.all).shouldBeTrue()
+        }
+      }
+    }
   }
 }