JS backend: add simple enum test

js/js.translator/testFiles/enum/cases/enumWithInheritance.kt

@@ -0,0 +1,43 @@
+package foo
+
+enum class B(open val bar: Int) {
+    val x = 1
+    var y = 12;
+    a : B(0) {
+        override val bar = 3
+        {
+            y = 0
+        }
+    }
+    b : B(4){}
+    c : B(5)
+}
+
+trait X {
+    val foo: Int
+    fun bar(): Int {
+        return foo;
+    }
+}
+
+enum class Y(override val foo: Int) : X {
+    m:Y(3)
+    n:Y(6)
+}
+
+fun box(): String {
+    if (B.a.x != 1) return "B.a.x != 1, it: ${B.a.x}"
+    if (B.a.y != 0) return "B.a.y != 0, it: ${B.a.y}"
+    if (B.a.bar != 3) return "B.a.bar != 3, it: ${B.a.bar}"
+
+    if (B.b.y != 12) return "B.b.y != 12, it: ${B.b.y}"
+    if (B.b.bar != 4) return "B.b.bar != 4, it: ${B.b.bar}"
+
+    if (B.c.bar != 5) return "B.c.bar != 5, it: ${B.c.bar}"
+    if (B.c.y != 12) return "B.c.y != 12, it: ${B.c.y}"
+
+    if (Y.m.bar() != 3) return "Y.m.bar() != 3, it: ${Y.m.bar()}"
+    if (Y.n.bar() != 6) return "Y.n.bar() != 6, it: ${Y.m.bar()}"
+
+    return "OK"
+}