Use category in downcase only for URL (Resolves jekyll#1739)

features/post_data.feature

@@ -141,7 +141,7 @@ Feature: Post data
     And I have a simple layout that contains "Post categories: {{ page.categories | array_to_sentence_string }}"
     When I run jekyll build
     Then the _site directory should exist
-    And I should see "Post categories: scifi and movies" in "_site/scifi/movies/2009/03/27/star-wars.html"
+    And I should see "Post categories: scifi and Movies" in "_site/scifi/movies/2009/03/27/star-wars.html"
 
   Scenario: Use post.categories variable when category is in YAML
     Given I have a _posts directory
@@ -163,7 +163,7 @@ Feature: Post data
     And I have a simple layout that contains "Post category: {{ page.categories }}"
     When I run jekyll build
     Then the _site directory should exist
-    And I should see "Post category: movies" in "_site/movies/2009/03/27/star-wars.html"
+    And I should see "Post category: Movies" in "_site/movies/2009/03/27/star-wars.html"
 
   Scenario: Use post.categories variable when categories are in YAML
     Given I have a _posts directory
@@ -197,8 +197,8 @@ Feature: Post data
     And I have a simple layout that contains "Post categories: {{ page.categories | array_to_sentence_string }}"
     When I run jekyll build
     Then the _site directory should exist
-    And I should see "Post categories: scifi and movies" in "_site/scifi/movies/2009/03/27/star-wars.html"
-    And I should see "Post categories: scifi and movies" in "_site/scifi/movies/2013/03/17/star-trek.html"
+    And I should see "Post categories: scifi and Movies" in "_site/scifi/movies/2009/03/27/star-wars.html"
+    And I should see "Post categories: SciFi and movies" in "_site/scifi/movies/2013/03/17/star-trek.html"
 
   Scenario Outline: Use page.path variable
     Given I have a <dir>/_posts directory

lib/jekyll/post.rb

@@ -52,7 +52,7 @@ def initialize(site, source, dir, name)
       @base = containing_dir(source, dir)
       @name = name
 
-      self.categories = dir.downcase.split('/').reject { |x| x.empty? }
+      self.categories = dir.split('/').reject { |x| x.empty? }
       process(name)
       read_yaml(@base, name)
 
@@ -87,7 +87,7 @@ def populate_categories
       categories_from_data = Utils.pluralized_array_from_hash(data, 'category', 'categories')
       self.categories = (
         Array(categories) + categories_from_data
-      ).map {|c| c.to_s.downcase}.flatten.uniq
+      ).map { |c| c.to_s }.flatten.uniq
     end
 
     def populate_tags
@@ -232,7 +232,7 @@ def url_placeholders
         :title       => slug,
         :i_day       => date.strftime("%-d"),
         :i_month     => date.strftime("%-m"),
-        :categories  => (categories || []).map { |c| c.to_s }.join('/'),
+        :categories  => (categories || []).map { |c| c.to_s.downcase }.join('/'),
         :short_month => date.strftime("%b"),
         :short_year  => date.strftime("%y"),
         :y_day       => date.strftime("%j"),

test/source/_posts/2013-07-22-post-excerpt-with-layout.markdown

@@ -5,6 +5,7 @@ categories:
 - bar
 - baz
 - z_category
+- MixedCase
 tags:
 - first
 - second

test/source/_posts/2013-12-20-properties.text

@@ -1,5 +1,5 @@
 ---
-categories: foo bar baz
+categories: foo bar baz MixedCase
 foo: bar
 layout: default
 tags: ay bee cee

test/source/_posts/2014-07-05-another-mixed-case-category.markdown

@@ -0,0 +1,7 @@
+---
+layout: default
+title: Another Mixed Case Category in YAML
+category: Mixedcase
+---
+
+Best *post* ever

test/source/_posts/2014-07-05-mixed-case-category.markdown

@@ -0,0 +1,7 @@
+---
+layout: default
+title: Mixed Case Category in YAML
+category: MixedCase
+---
+
+Best *post* ever

test/test_excerpt.rb

@@ -80,9 +80,9 @@ def do_render(post)
     context "#to_liquid" do
       should "contain the proper page data to mimick the post liquid" do
         assert_equal "Post Excerpt with Layout", @excerpt.to_liquid["title"]
-        assert_equal "/bar/baz/z_category/2013/07/22/post-excerpt-with-layout.html", @excerpt.to_liquid["url"]
+        assert_equal "/bar/baz/z_category/mixedcase/2013/07/22/post-excerpt-with-layout.html", @excerpt.to_liquid["url"]
         assert_equal Time.parse("2013-07-22"), @excerpt.to_liquid["date"]
-        assert_equal %w[bar baz z_category], @excerpt.to_liquid["categories"]
+        assert_equal %w[bar baz z_category MixedCase], @excerpt.to_liquid["categories"]
         assert_equal %w[first second third jekyllrb.com], @excerpt.to_liquid["tags"]
         assert_equal "_posts/2013-07-22-post-excerpt-with-layout.markdown", @excerpt.to_liquid["path"]
       end

test/test_generated_site.rb

@@ -14,7 +14,7 @@ class TestGeneratedSite < Test::Unit::TestCase
     end
 
     should "ensure post count is as expected" do
-      assert_equal 42, @site.posts.size
+      assert_equal 44, @site.posts.size
     end
 
     should "insert site.posts into the index" do

test/test_post.rb

@@ -31,21 +31,21 @@ def do_render(post)
       post = setup_post('2013-12-20-properties.text')
 
       attrs = {
-        categories: %w(foo bar baz),
+        categories: %w(foo bar baz MixedCase),
         content: "All the properties.\n\nPlus an excerpt.\n",
         date: Time.new(2013, 12, 20),
-        dir: "/foo/bar/baz/2013/12/20",
+        dir: "/foo/bar/baz/mixedcase/2013/12/20",
         excerpt: "All the properties.\n\n",
         foo: 'bar',
-        id: "/foo/bar/baz/2013/12/20/properties",
+        id: "/foo/bar/baz/mixedcase/2013/12/20/properties",
         layout: 'default',
         name: nil,
         path: "_posts/2013-12-20-properties.text",
         permalink: nil,
         published: nil,
         tags: %w(ay bee cee),
         title: 'Properties Post',
-        url: "/foo/bar/baz/2013/12/20/properties.html"
+        url: "/foo/bar/baz/mixedcase/2013/12/20/properties.html"
       }
 
       attrs.each do |attr, val|
@@ -250,14 +250,26 @@ def do_render(post)
 
         context "with space (categories)" do
           setup do
-            @post.categories << "French cuisine"
-            @post.categories << "Belgian beer"
+            @post.categories << "french cuisine"
+            @post.categories << "belgian beer"
             @post.process(@fake_file)
           end
 
           should "process the url correctly" do
             assert_equal "/:categories/:year/:month/:day/:title.html", @post.template
-            assert_equal "/French%20cuisine/Belgian%20beer/2008/09/09/foo-bar.html", @post.url
+            assert_equal "/french%20cuisine/belgian%20beer/2008/09/09/foo-bar.html", @post.url
+          end
+        end
+
+        context "with mixed case (category)" do
+          setup do
+            @post.categories << "MixedCase"
+            @post.process(@fake_file)
+          end
+
+          should "process the url correctly" do
+            assert_equal "/:categories/:year/:month/:day/:title.html", @post.template
+            assert_equal "/mixedcase/2008/09/09/foo-bar.html", @post.url
           end
         end
 
@@ -514,6 +526,12 @@ def do_render(post)
         assert !post.categories.include?(2013)
       end
 
+      should "recognize mixed case category in yaml" do
+        post = setup_post("2014-07-05-mixed-case-category.markdown")
+        assert post.categories.include?('MixedCase')
+        assert !post.categories.include?('mixedcase')
+      end
+
       should "recognize tag in yaml" do
         post = setup_post("2009-05-18-tag.textile")
         assert post.tags.include?('code')
@@ -586,6 +604,20 @@ def do_render(post)
                                         'escape-+ %20[].html'))
         end
 
+        should "write properly when category has different letter case" do
+          %w(2014-07-05-mixed-case-category.markdown 2014-07-05-another-mixed-case-category.markdown).each do |file|
+            post = setup_post(file)
+            do_render(post)
+            post.write(dest_dir)
+          end
+
+          assert File.directory?(dest_dir)
+          assert File.exist?(File.join(dest_dir, 'mixedcase', '2014', '07', '05',
+                                        'mixed-case-category.html'))
+          assert File.exist?(File.join(dest_dir, 'mixedcase', '2014', '07', '05',
+                                        'another-mixed-case-category.html'))
+        end
+
         should "write properly without html extension" do
           post = setup_post("2008-10-18-foo-bar.textile")
           post.site.permalink_style = ":title"

test/test_site.rb

@@ -212,7 +212,7 @@ def generate(site)
 
       posts = Dir[source_dir("**", "_posts", "**", "*")]
       posts.delete_if { |post| File.directory?(post) && !Post.valid?(post) }
-      categories = %w(2013 bar baz category es foo z_category publish_test win).sort
+      categories = %w(2013 bar baz category es foo z_category MixedCase Mixedcase publish_test win).sort
 
       assert_equal posts.size - @num_invalid_posts, @site.posts.size
       assert_equal categories, @site.categories.keys.sort