JS: move expressions test to box tests

js/js.translator/testData/box/dynamic/iterator.kt

@@ -0,0 +1,32 @@
+package foo
+
+fun testFor(expected: Int, d: dynamic, case: String) {
+    var actual = 0
+    for (v in d) {
+        actual += v as Int
+    }
+    assertEquals(expected, actual, "testFor on $case")
+}
+
+fun testIterator(expected: Int, d: dynamic, case: String) {
+    var actual = 0
+    val it = d.iterator()
+    while (it.hasNext()) {
+        actual += it.next() as Int
+    }
+    assertEquals(expected, actual, "testIterator on $case")
+}
+
+fun test(expected: Int, d: dynamic, case: String) {
+    testFor(expected, d, case)
+    testIterator(expected, d, case)
+}
+
+fun box(): String {
+    test(6, arrayOf(1, 2, 3), "array")
+    test(64, byteArrayOf(42, 22), "byte array")
+    test(66, listOf(55, 3, 8), "list")
+    test(167, setOf(55, 3, 8, 101), "set")
+
+    return "OK"
+}