JS: move expressions test to box tests

js/js.translator/testData/box/expression/if/nestedIf.kt

@@ -0,0 +1,35 @@
+// JS: generate wrong code for nested if
+// http://youtrack.jetbrains.com/issue/KT-5576
+
+package foo
+
+fun test2(a: Boolean, b: Boolean, c: Boolean) {
+    val a =
+            if (a) {
+                if (b) {
+                    "1"
+                } else if (c) {
+                    "2"
+                } else {
+                    throw Exception("Rest parameter must be array types")
+                }
+            }
+            else {
+                "3"
+            }
+}
+
+fun box(): String {
+
+    test2(true, true, false)
+    var wasException = false
+    try {
+        test2(true, false, false)
+    }
+    catch(e: Exception) {
+        wasException = true
+    }
+    assertEquals(true, wasException)
+
+    return "OK"
+}