Fix failing spec. Stubbing intermittently does not stub...

app/models/color_scheme.rb

@@ -20,7 +20,7 @@ class ColorScheme < ActiveRecord::Base
     @mutex.synchronize do
       return @base_colors if @base_colors
       @base_colors = {}
-      File.readlines(BASE_COLORS_FILE).each do |line|
+      read_colors_file.each do |line|
         matches = /\$([\w]+):\s*#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})(?:[;]|\s)/.match(line.strip)
         @base_colors[matches[1]] = matches[2] if matches
       end
@@ -28,6 +28,10 @@ class ColorScheme < ActiveRecord::Base
     @base_colors
   end
 
+  def self.read_colors_file
+    File.readlines(BASE_COLORS_FILE)
+  end
+
   def self.enabled
     current_version.find_by(enabled: true)
   end

spec/models/color_scheme_spec.rb

@@ -4,7 +4,7 @@ describe ColorScheme do
 
   describe '#base_colors' do
     it 'parses the colors.scss file and returns a hash' do
-      File.stubs(:readlines).with(described_class::BASE_COLORS_FILE).returns([
+      described_class.stubs(:read_colors_file).returns([
         '$primary:   #333333 !default;',
         '$secondary: #ffffff !default;  ',
         '$highlight: #ffff4d;',