default pattern to use a joined string

The string we create is almost always the same, so rather than joining
all the time, lets join once, then reuse that string everywhere.

actionpack/lib/action_dispatch/journey/path/pattern.rb

@@ -5,7 +5,7 @@ module ActionDispatch
         attr_reader :spec, :requirements, :anchored
 
         def self.from_string string
-          build(string, {}, ["/.?"], true)
+          build(string, {}, "/.?", true)
         end
 
         def self.build(path, requirements, separators, anchored)
@@ -17,7 +17,7 @@ module ActionDispatch
         def initialize(ast, requirements, separators, anchored)
           @spec         = ast
           @requirements = requirements
-          @separators   = separators.join
+          @separators   = separators
           @anchored     = anchored
 
           @names          = nil

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -185,8 +185,10 @@ module ActionDispatch
         end
         private :build_conditions
 
+        JOINED_SEPARATORS = SEPARATORS.join # :nodoc:
+
         def build_path(ast, requirements, anchor)
-          pattern = Journey::Path::Pattern.new(ast, requirements, SEPARATORS, anchor)
+          pattern = Journey::Path::Pattern.new(ast, requirements, JOINED_SEPARATORS, anchor)
 
           builder = Journey::GTG::Builder.new ast
 

actionpack/test/journey/path/pattern_test.rb

@@ -4,6 +4,8 @@ module ActionDispatch
   module Journey
     module Path
       class TestPattern < ActiveSupport::TestCase
+        SEPARATORS = ["/", ".", "?"].join
+
         x = /.+/
         {
           '/:controller(/:action)'       => %r{\A/(#{x})(?:/([^/.?]+))?\Z},
@@ -22,7 +24,7 @@ module ActionDispatch
             path = Pattern.build(
               path,
               { :controller => /.+/ },
-              ["/", ".", "?"],
+              SEPARATORS,
               true
             )
             assert_equal(expected, path.to_regexp)
@@ -46,7 +48,7 @@ module ActionDispatch
             path = Pattern.build(
               path,
               { :controller => /.+/ },
-              ["/", ".", "?"],
+              SEPARATORS,
               false
             )
             assert_equal(expected, path.to_regexp)
@@ -69,7 +71,7 @@ module ActionDispatch
             path = Pattern.build(
               path,
               { :controller => /.+/ },
-              ["/", ".", "?"],
+              SEPARATORS,
               true
             )
             assert_equal(expected, path.names)
@@ -84,7 +86,7 @@ module ActionDispatch
               (tender|love
               #MAO
               )/x },
-            ["/", ".", "?"],
+            SEPARATORS,
             true
           )
           assert_match(path, '/page/tender')
@@ -107,7 +109,7 @@ module ActionDispatch
           path = Pattern.build(
             '/:name',
             { :name => /\d+/ },
-            ["/", ".", "?"],
+            SEPARATORS,
             true
           )
           assert_match(path, '/123')
@@ -118,7 +120,7 @@ module ActionDispatch
           path = Pattern.build(
             '/page/:name',
             { :name => /(tender|love)/ },
-            ["/", ".", "?"],
+            SEPARATORS,
             true
           )
           assert_match(path, '/page/tender')
@@ -131,7 +133,7 @@ module ActionDispatch
           path = Pattern.build(
             '/page/:name/:value',
             requirements,
-            ["/", ".", "?"],
+            SEPARATORS,
             true
           )
 
@@ -146,7 +148,7 @@ module ActionDispatch
           path = Pattern.build(
             '/page/:name',
             { :name => /(tender|love)/ },
-            ["/", ".", "?"],
+            SEPARATORS,
             true
           )
           match = path.match '/page/tender'
@@ -158,7 +160,7 @@ module ActionDispatch
           path = Pattern.build(
             '/page/:name/:id',
             { :name => /t(((ender|love)))()/ },
-            ["/", ".", "?"],
+            SEPARATORS,
             true
           )
           match = path.match '/page/tender/10'
@@ -173,7 +175,7 @@ module ActionDispatch
           path = Pattern.build(
             '/page/*foo',
             { :foo => z },
-            ["/", ".", "?"],
+            SEPARATORS,
             true
           )
           assert_equal(%r{\A/page/(#{z})\Z}, path.to_regexp)
@@ -183,7 +185,7 @@ module ActionDispatch
           path = Pattern.build(
             '/page/:name/aaron',
             { :name => /(tender|love)/i },
-            ["/", ".", "?"],
+            SEPARATORS,
             true
           )
           assert_match(path, '/page/TENDER/aaron')
@@ -192,7 +194,7 @@ module ActionDispatch
         end
 
         def test_to_regexp_with_strexp
-          path = Pattern.build('/:controller', { }, ["/", ".", "?"], true)
+          path = Pattern.build('/:controller', { }, SEPARATORS, true)
           x = %r{\A/([^/.?]+)\Z}
 
           assert_equal(x.source, path.source)

actionpack/test/journey/route_test.rb

@@ -26,7 +26,7 @@ module ActionDispatch
       end
 
       def test_path_requirements_override_defaults
-        path    = Path::Pattern.build(':name', { name: /love/ }, ['/'], true)
+        path    = Path::Pattern.build(':name', { name: /love/ }, '/', true)
         defaults  = { name: 'tender' }
         route     = Route.new('name', nil, path, nil, [], defaults)
         assert_equal(/love/, route.requirements[:name])