Achievement Unlocked: true 100% coverage.

lib/squib.rb

@@ -19,7 +19,7 @@ module Squib
   # @api public
   def logger
     if @logger.nil?
-      @logger = Logger.new(STDOUT);
+      @logger = Logger.new($stdout);
       @logger.level = Logger::WARN;
       @logger.formatter = proc do |severity, datetime, m_progname, msg|
         "#{datetime} #{severity}: #{msg}\n"

spec/logger_spec.rb

@@ -0,0 +1,12 @@
+require 'spec_helper'
+
+describe Squib.logger do
+  it 'uses the custom format' do
+    Squib.logger = nil
+    oldstdout = $stdout
+    $stdout = StringIO.new
+    Squib::logger.warn "Test warn"
+    expect($stdout.string).to match /WARN: Test warn/
+    $stdout = oldstdout
+  end
+end