Properly suppressing output and testing progress bar

lib/squib/progress.rb

@@ -6,7 +6,9 @@ module Squib
   # @api private
   class DoNothing
     def increment
-      #do nothing!
+    end
+
+    def finish
     end
   end
 
@@ -22,7 +24,7 @@ module Squib
     end
 
     def start(title="", total=100, &block)
-      if @enabled && !(ENV['IN_TEST'].eql? "true")
+      if @enabled
         @bar = ProgressBar.create(title: title, total: total, format: '%t <%B> %p%% %a') 
         yield(@bar)
         @bar.finish

spec/samples_run_spec.rb

@@ -6,6 +6,8 @@ describe Squib do
 
   context "all samples run without error" do
     it "should execute with no errors" do
+      p = double("ProgressBar")
+      allow(ProgressBar).to receive(:create).and_return(Squib::DoNothing.new)
       samples = File.expand_path('../samples', File.dirname(__FILE__))
       Dir["#{samples}/**/*.rb"].each do |sample|
         Dir.chdir(samples) do #to save to _output

spec/spec_helper.rb

@@ -1,8 +1,6 @@
 require 'simplecov'
 require 'coveralls'
 
-ENV['IN_TEST']="true"
-
 SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
   SimpleCov::Formatter::HTMLFormatter,
   Coveralls::SimpleCov::Formatter

squib.gemspec

@@ -37,6 +37,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "bundler", "~> 1.6"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec", "~> 3.0"
+  spec.add_development_dependency "rspec-mocks", "~> 3.0"
   spec.add_development_dependency "redcarpet", '~> 3.1.2'
   spec.add_development_dependency "github-markup", '~> 1.2.1'
   spec.add_development_dependency "yard"