add test files

js/js.translator/testFiles/patternMatching/cases/whenNotValue.kt

@@ -0,0 +1,11 @@
+package foo
+
+fun box() : Boolean {
+  var a = 4
+  when(a) {
+    !is 3 -> {a = 10;}
+    !is 4 -> {a = 20;}
+    else -> {a = 30;}
+  }
+  return (a == 10)
+}