Fixed exceptions when matching arrays of emails against regexps; fixes gh-125 (based on a patch from github.com/phene)

lib/shoulda/action_mailer/matchers/have_sent_email.rb

@@ -98,7 +98,7 @@ module Shoulda # :nodoc:
         def regexp_or_string_match_in_array(an_array, a_regexp_or_string)
           case a_regexp_or_string
           when Regexp
-            an_array.detect{|e| e =~ a_regexp_or_string}.any?
+            an_array.any? { |string| string =~ a_regexp_or_string }
           when String
             an_array.include?(a_regexp_or_string)
           end

test/matchers/action_mailer/have_sent_email_test.rb

@@ -37,12 +37,18 @@ class HaveSentEmailTest < ActiveSupport::TestCase # :nodoc:
                      :message => /Expected sent email with subject/
     end
 
-    should "accept based on the sender" do
+    should "accept based on a string sender" do
       assert_accepts have_sent_email.from('do-not-reply@example.com'), nil
       assert_rejects have_sent_email.from('you@example.com'), nil,
                      :message => /Expected sent email from/
     end
 
+    should "accept based on a regexp sender" do
+      assert_accepts have_sent_email.from(/@example\.com/), nil
+      assert_rejects have_sent_email.from(/you@/), nil,
+                     :message => /Expected sent email from/
+    end
+
     should "accept based on the body" do
       assert_accepts have_sent_email.with_body(/is spam\./), nil
       assert_rejects have_sent_email.with_body(/totally safe/), nil,