From 5d037819ca80606638212f83de741cc2041db28f Mon Sep 17 00:00:00 2001
From: Xavier Noria <fxn@hashref.com>
Date: Tue, 18 Feb 2014 10:22:43 +0100
Subject: [PATCH] travel_to travels back and re-raises if the block raises

---
 .../lib/active_support/testing/time_helpers.rb       |  9 ++++++---
 activesupport/test/time_zone_test.rb                 | 12 ++++++++++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/activesupport/lib/active_support/testing/time_helpers.rb b/activesupport/lib/active_support/testing/time_helpers.rb
index b36f3cf94c..eefa84262e 100644
--- a/activesupport/lib/active_support/testing/time_helpers.rb
+++ b/activesupport/lib/active_support/testing/time_helpers.rb
@@ -10,7 +10,7 @@ module ActiveSupport
       def stub_object(object, method_name, return_value)
         key = [object.object_id, method_name]
 
-        if (stub = @stubs[key])
+        if stub = @stubs[key]
           unstub_object(stub)
         end
 
@@ -97,8 +97,11 @@ module ActiveSupport
         simple_stubs.stub_object(Date, :today, now.to_date)
 
         if block_given?
-          block.call
-          travel_back
+          begin
+            block.call
+          ensure
+            travel_back
+          end
         end
       end
 
diff --git a/activesupport/test/time_zone_test.rb b/activesupport/test/time_zone_test.rb
index 9fa2f45de5..79ec57af2b 100644
--- a/activesupport/test/time_zone_test.rb
+++ b/activesupport/test/time_zone_test.rb
@@ -138,6 +138,18 @@ class TimeZoneTest < ActiveSupport::TestCase
     end
   end
 
+  def test_travel_to_travels_back_and_reraises_if_the_block_raises
+    ts = Time.current - 1.second
+
+    travel_to ts do
+      raise
+    end
+
+    flunk # ensure travel_to re-raises
+  rescue
+    assert_not_equal ts, Time.current
+  end
+
   def test_local
     time = ActiveSupport::TimeZone["Hawaii"].local(2007, 2, 5, 15, 30, 45)
     assert_equal Time.utc(2007, 2, 5, 15, 30, 45), time.time