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diff --git a/app/assets/images/emoji/u6e80.png b/app/assets/images/emoji/u6e80.png
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index 00000000000..5df1cb878f7
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diff --git a/app/assets/images/emoji/u7121.png b/app/assets/images/emoji/u7121.png
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index 00000000000..25f694ed3ff
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diff --git a/app/assets/images/emoji/u7533.png b/app/assets/images/emoji/u7533.png
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index 00000000000..fc4a9901b46
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diff --git a/app/assets/images/emoji/u7981.png b/app/assets/images/emoji/u7981.png
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diff --git a/app/assets/images/emoji/u7a7a.png b/app/assets/images/emoji/u7a7a.png
new file mode 100755
index 00000000000..c05f5cff73b
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diff --git a/app/assets/images/emoji/uk.png b/app/assets/images/emoji/uk.png
new file mode 100755
index 00000000000..2a62c7a0810
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diff --git a/app/assets/images/emoji/umbrella.png b/app/assets/images/emoji/umbrella.png
new file mode 100755
index 00000000000..1db722fa661
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diff --git a/app/assets/images/emoji/unamused.png b/app/assets/images/emoji/unamused.png
new file mode 100755
index 00000000000..3722e6f5753
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diff --git a/app/assets/images/emoji/underage.png b/app/assets/images/emoji/underage.png
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index 00000000000..a789b3c6200
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diff --git a/app/assets/images/emoji/unlock.png b/app/assets/images/emoji/unlock.png
new file mode 100755
index 00000000000..22b429cd021
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diff --git a/app/assets/images/emoji/up.png b/app/assets/images/emoji/up.png
new file mode 100755
index 00000000000..829219a868a
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diff --git a/app/assets/images/emoji/us.png b/app/assets/images/emoji/us.png
new file mode 100755
index 00000000000..38137669aa9
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diff --git a/app/assets/images/emoji/v.png b/app/assets/images/emoji/v.png
new file mode 100755
index 00000000000..f61267c281d
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diff --git a/app/assets/images/emoji/vertical_traffic_light.png b/app/assets/images/emoji/vertical_traffic_light.png
new file mode 100755
index 00000000000..7a5ba35f09d
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diff --git a/app/assets/images/emoji/vhs.png b/app/assets/images/emoji/vhs.png
new file mode 100755
index 00000000000..881081c1778
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diff --git a/app/assets/images/emoji/vibration_mode.png b/app/assets/images/emoji/vibration_mode.png
new file mode 100755
index 00000000000..a716e96c635
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diff --git a/app/assets/images/emoji/video_camera.png b/app/assets/images/emoji/video_camera.png
new file mode 100755
index 00000000000..274cecdd6d4
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diff --git a/app/assets/images/emoji/video_game.png b/app/assets/images/emoji/video_game.png
new file mode 100755
index 00000000000..59d45baeabb
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diff --git a/app/assets/images/emoji/violin.png b/app/assets/images/emoji/violin.png
new file mode 100755
index 00000000000..0dba5ba2b66
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diff --git a/app/assets/images/emoji/virgo.png b/app/assets/images/emoji/virgo.png
new file mode 100755
index 00000000000..72e1763f573
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diff --git a/app/assets/images/emoji/volcano.png b/app/assets/images/emoji/volcano.png
new file mode 100755
index 00000000000..9b434539b05
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diff --git a/app/assets/images/emoji/vs.png b/app/assets/images/emoji/vs.png
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index 00000000000..863638850e1
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diff --git a/app/assets/images/emoji/walking.png b/app/assets/images/emoji/walking.png
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index 00000000000..52bc0381c72
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diff --git a/app/assets/images/emoji/waning_crescent_moon.png b/app/assets/images/emoji/waning_crescent_moon.png
new file mode 100755
index 00000000000..30387780fec
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diff --git a/app/assets/images/emoji/waning_gibbous_moon.png b/app/assets/images/emoji/waning_gibbous_moon.png
new file mode 100755
index 00000000000..8e324ec5f7f
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diff --git a/app/assets/images/emoji/warning.png b/app/assets/images/emoji/warning.png
new file mode 100755
index 00000000000..466658d99a8
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diff --git a/app/assets/images/emoji/watch.png b/app/assets/images/emoji/watch.png
new file mode 100755
index 00000000000..d503bb87c22
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diff --git a/app/assets/images/emoji/water_buffalo.png b/app/assets/images/emoji/water_buffalo.png
new file mode 100755
index 00000000000..3bcde3edd95
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diff --git a/app/assets/images/emoji/watermelon.png b/app/assets/images/emoji/watermelon.png
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index 00000000000..fc212be7844
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diff --git a/app/assets/images/emoji/wave.png b/app/assets/images/emoji/wave.png
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index 00000000000..e78402eb086
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diff --git a/app/assets/images/emoji/wavy_dash.png b/app/assets/images/emoji/wavy_dash.png
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index 00000000000..77f626cc5cd
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diff --git a/app/assets/images/emoji/waxing_crescent_moon.png b/app/assets/images/emoji/waxing_crescent_moon.png
new file mode 100755
index 00000000000..c8f13dd31c8
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diff --git a/app/assets/images/emoji/waxing_gibbous_moon.png b/app/assets/images/emoji/waxing_gibbous_moon.png
new file mode 100755
index 00000000000..dd8c4845896
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diff --git a/app/assets/images/emoji/wc.png b/app/assets/images/emoji/wc.png
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index 00000000000..dfe84d2a73a
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diff --git a/app/assets/images/emoji/weary.png b/app/assets/images/emoji/weary.png
new file mode 100755
index 00000000000..0c5475411c1
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diff --git a/app/assets/images/emoji/wedding.png b/app/assets/images/emoji/wedding.png
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index 00000000000..ead19d52cfb
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diff --git a/app/assets/images/emoji/whale.png b/app/assets/images/emoji/whale.png
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index 00000000000..5bb113e4289
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diff --git a/app/assets/images/emoji/whale2.png b/app/assets/images/emoji/whale2.png
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index 00000000000..4af657b2fdc
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diff --git a/app/assets/images/emoji/wheelchair.png b/app/assets/images/emoji/wheelchair.png
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index 00000000000..eddcdd7977a
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diff --git a/app/assets/images/emoji/white_circle.png b/app/assets/images/emoji/white_circle.png
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index 00000000000..da782ae297f
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diff --git a/app/assets/images/emoji/white_flower.png b/app/assets/images/emoji/white_flower.png
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index 00000000000..c0929d0dd99
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diff --git a/app/assets/images/emoji/white_square.png b/app/assets/images/emoji/white_square.png
new file mode 100755
index 00000000000..60cb19a1371
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diff --git a/app/assets/images/emoji/wind_chime.png b/app/assets/images/emoji/wind_chime.png
new file mode 100755
index 00000000000..efacf5dd4be
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diff --git a/app/assets/images/emoji/wine_glass.png b/app/assets/images/emoji/wine_glass.png
new file mode 100755
index 00000000000..82b0f00057d
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diff --git a/app/assets/images/emoji/wink.png b/app/assets/images/emoji/wink.png
new file mode 100755
index 00000000000..756766dd3e9
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diff --git a/app/assets/images/emoji/wink2.png b/app/assets/images/emoji/wink2.png
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index 00000000000..6ae9d497d30
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diff --git a/app/assets/images/emoji/wolf.png b/app/assets/images/emoji/wolf.png
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index 00000000000..c60c96895f7
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diff --git a/app/assets/images/emoji/woman.png b/app/assets/images/emoji/woman.png
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index 00000000000..6bf0d2b129c
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diff --git a/app/assets/images/emoji/womans_clothes.png b/app/assets/images/emoji/womans_clothes.png
new file mode 100755
index 00000000000..aa297c7b65e
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diff --git a/app/assets/images/emoji/womans_hat.png b/app/assets/images/emoji/womans_hat.png
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index 00000000000..4cb2e6a6934
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diff --git a/app/assets/images/emoji/womens.png b/app/assets/images/emoji/womens.png
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index 00000000000..110f88519e8
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diff --git a/app/assets/images/emoji/wrench.png b/app/assets/images/emoji/wrench.png
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index 00000000000..a87072ad132
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diff --git a/app/assets/images/emoji/x.png b/app/assets/images/emoji/x.png
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index 00000000000..dff9efa8b43
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diff --git a/app/assets/images/emoji/yellow_heart.png b/app/assets/images/emoji/yellow_heart.png
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index 00000000000..fa41ce78ac4
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diff --git a/app/assets/images/emoji/yen.png b/app/assets/images/emoji/yen.png
new file mode 100755
index 00000000000..139bc936e0f
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diff --git a/app/assets/images/emoji/yum.png b/app/assets/images/emoji/yum.png
new file mode 100755
index 00000000000..fc39637ecd8
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diff --git a/app/assets/images/emoji/zap.png b/app/assets/images/emoji/zap.png
new file mode 100755
index 00000000000..260c531b9e2
Binary files /dev/null and b/app/assets/images/emoji/zap.png differ
diff --git a/app/assets/images/emoji/zero.png b/app/assets/images/emoji/zero.png
new file mode 100755
index 00000000000..6e57b3343ad
Binary files /dev/null and b/app/assets/images/emoji/zero.png differ
diff --git a/app/assets/images/emoji/zzz.png b/app/assets/images/emoji/zzz.png
new file mode 100755
index 00000000000..30be04655af
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diff --git a/app/helpers/gitlab_markdown_helper.rb b/app/helpers/gitlab_markdown_helper.rb
index a7ab7c6c38c..ca2cb01f35d 100644
--- a/app/helpers/gitlab_markdown_helper.rb
+++ b/app/helpers/gitlab_markdown_helper.rb
@@ -1,38 +1,5 @@
 module GitlabMarkdownHelper
-  # Replaces references (i.e. @abc, #123, !456, ...) in the text with links to
-  # the appropriate items in GitLab.
-  #
-  # text          - the source text
-  # html_options  - extra options for the reference links as given to link_to
-  #
-  # note: reference links will only be generated if @project is set
-  #
-  # see Gitlab::Markdown for details on the supported syntax
-  def gfm(text, html_options = {})
-    return text if text.nil?
-    return text if @project.nil?
-
-    # Extract pre blocks so they are not altered
-    # from http://github.github.com/github-flavored-markdown/
-    extractions = {}
-    text.gsub!(%r{<pre>.*?</pre>|<code>.*?</code>}m) do |match|
-      md5 = Digest::MD5.hexdigest(match)
-      extractions[md5] = match
-      "{gfm-extraction-#{md5}}"
-    end
-
-    # TODO: add popups with additional information
-
-    parser = Gitlab::Markdown.new(@project, html_options)
-    text = parser.parse(text)
-
-    # Insert pre block extractions
-    text.gsub!(/\{gfm-extraction-(\h{32})\}/) do
-      extractions[$1]
-    end
-
-    sanitize text.html_safe, attributes:  ActionView::Base.sanitized_allowed_attributes + %w(id class )
-  end
+  include Gitlab::Markdown
 
   # Use this in places where you would normally use link_to(gfm(...), ...).
   #
diff --git a/app/models/note.rb b/app/models/note.rb
index 711a4ee6935..d8494edd532 100644
--- a/app/models/note.rb
+++ b/app/models/note.rb
@@ -103,7 +103,7 @@ class Note < ActiveRecord::Base
   # Returns true if this is an upvote note,
   # otherwise false is returned
   def upvote?
-    note =~ /^\+1/ ? true : false
+    note.start_with?('+1') || note.start_with?(':+1:')
   end
 end
 # == Schema Information
diff --git a/lib/gitlab/markdown.rb b/lib/gitlab/markdown.rb
index a387b503ccb..57b37764ce2 100644
--- a/lib/gitlab/markdown.rb
+++ b/lib/gitlab/markdown.rb
@@ -1,7 +1,8 @@
 module Gitlab
   # Custom parser for GitLab-flavored Markdown
   #
-  # It replaces references in the text with links to the appropriate items in Gitlab.
+  # It replaces references in the text with links to the appropriate items in
+  # GitLab.
   #
   # Supported reference formats are:
   #   * @foo for team members
@@ -10,19 +11,20 @@ module Gitlab
   #   * $123 for snippets
   #   * 123456 for commits
   #
+  # It also parses Emoji codes to insert images. See
+  # http://www.emoji-cheat-sheet.com/ for a list of the supported icons.
+  #
   # Examples
   #
-  #   >> m = Markdown.new(...)
-  #
-  #   >> m.parse("Hey @david, can you fix this?")
+  #   >> gfm("Hey @david, can you fix this?")
   #   => "Hey <a href="/gitlab/team_members/1">@david</a>, can you fix this?"
   #
-  #   >> m.parse("Commit 35d5f7c closes #1234")
+  #   >> gfm("Commit 35d5f7c closes #1234")
   #   => "Commit <a href="/gitlab/commits/35d5f7c">35d5f7c</a> closes <a href="/gitlab/issues/1234">#1234</a>"
-  class Markdown
-    include Rails.application.routes.url_helpers
-    include ActionView::Helpers
-
+  #
+  #   >> gfm(":trollface:")
+  #   => "<img alt=\":trollface:\" class=\"emoji\" src=\"/images/trollface.png" title=\":trollface:\" />
+  module Markdown
     REFERENCE_PATTERN = %r{
       ([^\w&;])?      # Prefix (1)
       (               # Reference (2)
@@ -33,15 +35,52 @@ module Gitlab
       ([^\w&;])?      # Suffix (6)
     }x.freeze
 
+    EMOJI_PATTERN = %r{(:(\S+):)}.freeze
+
     attr_reader :html_options
 
-    def initialize(project, html_options = {})
-      @project      = project
+    # Public: Parse the provided text with GitLab-Flavored Markdown
+    #
+    # text         - the source text
+    # html_options - extra options for the reference links as given to link_to
+    #
+    # Note: reference links will only be generated if @project is set
+    def gfm(text, html_options = {})
+      return text if text.nil?
+      return text if @project.nil?
+
       @html_options = html_options
+
+      # Extract pre blocks so they are not altered
+      # from http://github.github.com/github-flavored-markdown/
+      extractions = {}
+      text.gsub!(%r{<pre>.*?</pre>|<code>.*?</code>}m) do |match|
+        md5 = Digest::MD5.hexdigest(match)
+        extractions[md5] = match
+        "{gfm-extraction-#{md5}}"
+      end
+
+      # TODO: add popups with additional information
+
+      text = parse(text)
+
+      # Insert pre block extractions
+      text.gsub!(/\{gfm-extraction-(\h{32})\}/) do
+        extractions[$1]
+      end
+
+      sanitize text.html_safe, attributes: ActionView::Base.sanitized_allowed_attributes + %w(id class)
     end
 
+    private
+
+    # Private: Parses text for references and emoji
+    #
+    # text - Text to parse
+    #
+    # Returns parsed text
     def parse(text)
-      text.gsub(REFERENCE_PATTERN) do |match|
+      text = text.gsub(REFERENCE_PATTERN) do |match|
         prefix     = $1 || ''
         reference  = $2
         identifier = $3 || $4 || $5
@@ -53,9 +92,26 @@ module Gitlab
           match
         end
       end
+
+      text = text.gsub(EMOJI_PATTERN) do |match|
+        if valid_emoji?($2)
+          helper.image_tag("#{$2}.png", size: "20x20", class: 'emoji', title: $1, alt: $1)
+        else
+          match
+        end
+      end
+
+      text
     end
 
-    private
+    # Private: Checks if an emoji icon exists in the image asset directory
+    #
+    # emoji - Identifier of the emoji as a string (e.g., "+1", "heart")
+    #
+    # Returns boolean
+    def valid_emoji?(emoji)
+      File.exists?(Rails.root.join('app', 'assets', 'images', 'emoji', "#{emoji}.png"))
+    end
 
     # Private: Dispatches to a dedicated processing method based on reference
     #
diff --git a/spec/helpers/gitlab_markdown_helper_spec.rb b/spec/helpers/gitlab_markdown_helper_spec.rb
index 00164e0cdd7..3e7a02c6e35 100644
--- a/spec/helpers/gitlab_markdown_helper_spec.rb
+++ b/spec/helpers/gitlab_markdown_helper_spec.rb
@@ -208,6 +208,46 @@ describe GitlabMarkdownHelper do
         gfm(actual).should match(expected)
       end
     end
+
+    describe "emoji" do
+      it "matches at the start of a string" do
+        gfm(":+1:").should match(/<img/)
+      end
+
+      it "matches at the end of a string" do
+        gfm("This gets a :-1:").should match(/<img/)
+      end
+
+      it "matches with adjacent text" do
+        gfm("+1 (:+1:)").should match(/<img/)
+      end
+
+      it "has a title attribute" do
+        gfm(":-1:").should match(/title=":-1:"/)
+      end
+
+      it "has an alt attribute" do
+        gfm(":-1:").should match(/alt=":-1:"/)
+      end
+
+      it "has an emoji class" do
+        gfm(":+1:").should match('class="emoji"')
+      end
+
+      it "sets height and width" do
+        actual = gfm(":+1:")
+        actual.should match(/width="20"/)
+        actual.should match(/height="20"/)
+      end
+
+      it "keeps whitespace intact" do
+        gfm("This deserves a :+1: big time.").should match(/deserves a <img.+\/> big time/)
+      end
+
+      it "ignores invalid emoji" do
+        gfm(":invalid-emoji:").should_not match(/<img/)
+      end
+    end
   end
 
   describe "#link_to_gfm" do
diff --git a/spec/models/note_spec.rb b/spec/models/note_spec.rb
index ffaf442d9a4..dddfd34c499 100644
--- a/spec/models/note_spec.rb
+++ b/spec/models/note_spec.rb
@@ -35,6 +35,16 @@ describe Note do
       note = Factory(:note, note: "-1 for this")
       note.should_not be_upvote
     end
+
+    it "recognizes a +1 emoji as a vote" do
+      note = build(:note, note: ":+1: for this")
+      note.should be_upvote
+    end
+
+    it "recognizes a neutral emoji note" do
+      note = build(:note, note: "I would :+1: this, but I don't want to")
+      note.should_not be_upvote
+    end
   end
 
   let(:project) { create(:project) }