JS backend: tests for reflection support

js/js.translator/testData/callableReference/function/cases/extensionFromTopLevelUnitNoArgs.kt

@@ -0,0 +1,26 @@
+// This test was adapted from compiler/testData/codegen/boxWithStdlib/callableReference/function/.
+package foo
+
+fun run(arg1: A, funRef:A.() -> Unit): Unit {
+    return arg1.funRef()
+}
+
+class A {
+    var result = "Fail"
+}
+
+fun A.foo() {
+    result = "OK"
+}
+
+fun box(): String {
+    val a = A()
+    val x = A::foo
+    a.x()
+
+    if (a.result != "OK") return a.result
+
+    val a1 = A()
+    run(a1, A::foo)
+    return a.result
+}