JS: move more test to box tests

js/js.translator/testData/box/reified/extensionLambda.kt

@@ -0,0 +1,21 @@
+package foo
+
+class A
+class B
+
+fun <T, R> apply(x: T, fn: T.()->R): R = x.fn()
+
+inline fun <reified T, reified R> test(x: Any, y: Any): Boolean =
+        x is T && apply(y) { this is R }
+
+fun box(): String {
+    val a = A()
+    val b = B()
+
+    assertEquals(true, test<A, B>(a, b), "test<A, B>(a, b)")
+    assertEquals(false, test<A, B>(a, a), "test<A, B>(a, a)")
+    assertEquals(false, test<A, B>(b, b), "test<A, B>(b, b)")
+    assertEquals(false, test<A, B>(b, a), "test<A, B>(b, a)")
+
+    return "OK"
+}