JS: move more test to box tests

js/js.translator/testData/box/jsCode/objectScopes.kt

@@ -0,0 +1,15 @@
+package foo
+
+@native interface Summizer {
+    fun sum(a: Int, b: Int): Int
+}
+
+fun box(): String {
+    val summizer1: Summizer = js("({ sum: function(a, b) { return a + b; }})")
+    assertEquals(3, summizer1.sum(1, 2), "summizer1")
+
+    val summizer2: Summizer = js("({ sum: function(a, b) { return a + b; }})")
+    assertEquals(3, summizer2.sum(1, 2), "summizer2")
+
+    return "OK";
+}