Merge pull request #2298 from github/add-proximity-test

Add proximity test for colors

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__)

test/test_color_proximity.rb

@@ -0,0 +1,23 @@
+require_relative "./helper"
+
+class TestColorProximity < Minitest::Test
+  include Linguist
+
+  def cut_hash(color)
+    color[1..-1] if color.start_with?('#')
+  end
+
+  def test_color_proximity
+    langs_with_colors = Language.all.reject { |language| language.color.nil? }
+    cp = ColorProximity.new(0.05, langs_with_colors.map { |lang| cut_hash(lang.color) })
+    failing_threshold = langs_with_colors.map do |lang|
+      state = cp.past_threshold?(cut_hash(lang.color))
+      if !state.first && lang.color != "##{state.last.first}"
+        "- #{lang} (#{lang.color}) is too close to #{state.last}"
+      end
+    end.compact
+    message = "The following #{failing_threshold.length} languages have failing color thresholds. Please modify the hex color.\n#{failing_threshold.join("\n")}"
+
+    assert failing_threshold.empty?, message
+  end
+end

test/test_language.rb

@@ -286,9 +286,9 @@ class TestLanguage < Minitest::Test
 
   def test_color
     assert_equal '#701516', Language['Ruby'].color
-    assert_equal '#3581ba', Language['Python'].color
+    assert_equal '#3572A5', Language['Python'].color
     assert_equal '#f1e05a', Language['JavaScript'].color
-    assert_equal '#31859c', Language['TypeScript'].color
+    assert_equal '#2b7489', Language['TypeScript'].color
     assert_equal '#3d9970', Language['LSL'].color
   end