From 3851b7c01672eae9b7f9254fc9df834873653535 Mon Sep 17 00:00:00 2001
From: Garen Torikian <gjtorikian@gmail.com>
Date: Wed, 1 Apr 2015 10:14:52 -0700
Subject: [PATCH] Add test for detecting color proximity

---
 github-linguist.gemspec      |  1 +
 test/helper.rb               |  1 +
 test/test_color_threshold.rb | 20 ++++++++++++++++++++
 3 files changed, 22 insertions(+)
 create mode 100644 test/test_color_threshold.rb

diff --git a/github-linguist.gemspec b/github-linguist.gemspec
index 8f3fe075..e680b9f5 100644
--- a/github-linguist.gemspec
+++ b/github-linguist.gemspec
@@ -23,4 +23,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'pry'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'yajl-ruby'
+  s.add_development_dependency 'color-proximity'
 end
diff --git a/test/helper.rb b/test/helper.rb
index a6a03672..ab3cc8fa 100644
--- a/test/helper.rb
+++ b/test/helper.rb
@@ -2,6 +2,7 @@ require "bundler/setup"
 require "minitest/autorun"
 require "mocha/setup"
 require "linguist"
+require 'color-proximity'
 
 def fixtures_path
   File.expand_path("../fixtures", __FILE__)
diff --git a/test/test_color_threshold.rb b/test/test_color_threshold.rb
new file mode 100644
index 00000000..9d1faaab
--- /dev/null
+++ b/test/test_color_threshold.rb
@@ -0,0 +1,20 @@
+require_relative "./helper"
+
+class TestColorThreshold < Minitest::Test
+  include Linguist
+
+  def test_color_threshold
+    langs_with_colors = Language.all.reject { |language| language.color.nil? }
+    cp = ColorProximity.new(20, langs_with_colors.map(&:color))
+    failing_threshold = []
+    langs_with_colors.each do |lang|
+      state = cp.within_threshold?(lang.color[1..-1])
+      unless state.first
+        failing_threshold << [lang, state.last]
+      end
+    end
+    message = "The following languages have failing color thresholds. Please modify the hex color.\n#{failing_threshold}"
+
+    assert failing_threshold.empty?, message
+  end
+end