From 8980647f329a77722583348e8980c97fd47edbc6 Mon Sep 17 00:00:00 2001
From: Adam Roben <adam@roben.org>
Date: Thu, 6 Feb 2014 09:07:43 -0500
Subject: [PATCH] Add tests for the optimization of trailing return statements

This documents current behavior. When #1038 was fixed, we also optimized
away trailing "undefined" and "return undefined", but that is no longer
the case.
---
 test/functions.coffee | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/test/functions.coffee b/test/functions.coffee
index 7349428e..931d79a8 100644
--- a/test/functions.coffee
+++ b/test/functions.coffee
@@ -240,3 +240,16 @@ test "#1435 Indented property access", ->
             rec.rec()
           .rec()
     1
+
+test "#1038 Optimize trailing return statements", ->
+  compile = (code) -> CoffeeScript.compile(code, bare: yes).trim().replace(/\s+/g, " ")
+
+  eq "(function() {});",                 compile("->")
+  eq "(function() {});",                 compile("-> return")
+  eq "(function() { return void 0; });", compile("-> undefined")
+  eq "(function() { return void 0; });", compile("-> return undefined")
+  eq "(function() { foo(); });",         compile("""
+                                                 ->
+                                                   foo()
+                                                   return
+                                                 """)