JS: move more test to box tests

js/js.translator/testData/box/native/undefined.kt

@@ -0,0 +1,20 @@
+package foo
+
+fun box(): String {
+    assertEquals(eval("undefined"), undefined)
+    assertEquals(js("undefined"), undefined)
+
+    assertNotEquals(1, undefined)
+    assertNotEquals("sss", undefined)
+    assertNotEquals(object {}, undefined)
+
+    val a: dynamic = 1
+    assertEquals(a.foo, undefined)
+    assertNotEquals(a.toString, undefined)
+
+    val b: dynamic = object {val bar = ""}
+    assertEquals(b.foo, undefined)
+    assertNotEquals(b.bar, undefined)
+
+    return "OK"
+}