Added reproducer for jqno/equalsverifier#1083.

Author: ianbrandt

subprojects/equalsverifier-with-kotlin/src/main/kotlin/org/sdkotlin/equalsverifier/delegation/DelegatedEquals.kt

@@ -0,0 +1,25 @@
+package org.sdkotlin.equalsverifier.delegation
+
+interface Foo {
+	val foo: Int
+}
+
+interface Bar {
+	val bar: Int
+}
+
+data class BarImpl(override val bar: Int) : Bar
+
+class FooBarImpl(barValue: Int) : Foo, Bar by BarImpl(barValue) {
+
+	override val foo = -bar
+
+	override fun equals(other: Any?): Boolean {
+		if (this === other) return true
+		if (other !is FooBarImpl) return false
+		return bar == other.bar
+	}
+
+	override fun hashCode(): Int = bar
+	override fun toString(): String = "FooBarImpl(foo=$bar)"
+}

subprojects/equalsverifier-with-kotlin/src/test/kotlin/org/sdkotlin/equalsverifier/delegation/FooBarImplTest.kt

@@ -0,0 +1,29 @@
+package org.sdkotlin.equalsverifier.delegation
+
+import nl.jqno.equalsverifier.EqualsVerifier
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Disabled
+import org.junit.jupiter.api.Test
+
+class FooBarImplTest {
+
+	@Test
+	@Disabled("https://github.com/jqno/equalsverifier/issues/1083")
+	fun `test equals, hashCode, and toString`() {
+		EqualsVerifier.forClass(FooBarImpl::class.java).verify()
+	}
+
+	@Test
+	fun `test equals for equal`() {
+		val actual = FooBarImpl(1)
+		val expected = FooBarImpl(1)
+		assertThat(actual).isEqualTo(expected)
+	}
+
+	@Test
+	fun `test equals for not equal`() {
+		val actual = FooBarImpl(1)
+		val expected = FooBarImpl(2)
+		assertThat(actual).isNotEqualTo(expected)
+	}
+}