Test equals/hashCode/toString for function references

compiler/testData/codegen/boxWithStdlib/reflection/methodsFromAny/functionEqualsHashCode.kt

@@ -0,0 +1,31 @@
+import kotlin.test.*
+
+fun top() = 42
+
+fun Int.intExt(): Int = this
+
+class A {
+    fun mem() {}
+}
+
+class B {
+    fun mem() {}
+}
+
+
+fun checkEqual(x: Any, y: Any) {
+    assertEquals(x, y)
+    assertEquals(x.hashCode(), y.hashCode(), "Elements are equal but their hash codes are not: ${x.hashCode()} != ${y.hashCode()}")
+}
+
+fun box(): String {
+    checkEqual(::top, ::top)
+    checkEqual(Int::intExt, Int::intExt)
+    checkEqual(A::mem, A::mem)
+
+    assertFalse(::top == Int::intExt)
+    assertFalse(::top == A::mem)
+    assertFalse(A::mem == B::mem)
+
+    return "OK"
+}