add support for curly brackets with the --pattern option, fixes #868

features/configuration/pattern.feature

@@ -28,3 +28,11 @@ Feature: pattern
   Scenario: the --pattern flag makes RSpec run files matching the specified pattern and ignore the default pattern
    When I run `rspec -P "**/*_test.rb"`
    Then the output should contain "1 example, 0 failures"
+
+  Scenario: the --pattern flag can be used to pass in multiple patterns, separated by comma
+   When I run `rspec -P "**/*_test.rb,**/*_spec.rb"`
+   Then the output should contain "3 examples, 0 failures"
+
+  Scenario: the --pattern flag accepts shell style glob unions
+   When I run `rspec -P "**/*_{test,spec}.rb"`
+   Then the output should contain "3 examples, 0 failures"

lib/rspec/core/configuration.rb

@@ -977,17 +977,16 @@ def order_groups_and_examples(&block)
     private
 
       def get_files_to_run(paths)
-        patterns = pattern.split(",")
         paths.map do |path|
           path = path.gsub(File::ALT_SEPARATOR, File::SEPARATOR) if File::ALT_SEPARATOR
-          File.directory?(path) ? gather_directories(path, patterns) : extract_location(path)
+          File.directory?(path) ? gather_directories(path) : extract_location(path)
         end.flatten.sort
       end
 
-      def gather_directories(path, patterns)
-        patterns.map do |pattern|
-          pattern =~ /^#{path}/ ? Dir[pattern.strip].sort : Dir["#{path}/{#{pattern.strip}}"].sort
-        end
+      def gather_directories(path)
+        stripped = "{#{pattern.gsub(/\s*,\s*/, ',')}}"
+        files    = pattern.start_with?(path) ? Dir[stripped] : Dir["#{path}/#{stripped}"]
+        files.sort
       end
 
       def extract_location(path)

spec/rspec/core/configuration_spec.rb

@@ -385,7 +385,7 @@ def specify_consistent_ordering_of_files_to_run
           %w[ a/2.rb a/1.rb a/3.rb ],
           %w[ a/3.rb a/2.rb a/1.rb ]
         ].map do |files|
-          Dir.should_receive(:[]).with(/^a/) { files }
+          Dir.should_receive(:[]).with(/^\{?a/) { files }
           yield
           config.files_to_run
         end
@@ -466,6 +466,14 @@ def specify_consistent_ordering_of_files_to_run
             expect(config.files_to_run).to include("#{dir}/a_foo.rb")
             expect(config.files_to_run).to include("#{dir}/a_bar.rb")
           end
+
+          it "supports curly braces glob syntax" do
+            config.send(setter, "**/*_{foo,bar}.rb")
+            dir = File.expand_path(File.dirname(__FILE__) + "/resources")
+            config.files_or_directories_to_run = dir
+            expect(config.files_to_run).to include("#{dir}/a_foo.rb")
+            expect(config.files_to_run).to include("#{dir}/a_bar.rb")
+          end
         end
       end
     end