JS backend: tests for reflection support

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

@@ -0,0 +1,12 @@
+// This test was adapted from compiler/testData/codegen/boxWithStdlib/callableReference/function/local/.
+package foo
+
+fun box(): String {
+    var result = "Fail"
+
+    fun changeToOK() { result = "OK" }
+
+    val ok = ::changeToOK
+    ok()
+    return result
+}