Add flamegraphs and change graph printer

For testing and easier visualization use flamegraph and the html printer
for ruby-prof. I couldn't get the ruby-prof-flamegraph gem to work with
these types of tests :(

Author: eileencodes

Gemfile

@@ -46,6 +46,7 @@ end
 
 group :test do
   gem 'ruby-prof'
+  gem 'flamegraph'
   gem 'mocha'
   gem 'capybara'
   gem 'benchmark-ips'

Gemfile.lock

@@ -60,8 +60,6 @@ GEM
   specs:
     arel (6.0.0)
     benchmark-ips (2.1.0)
-    binding_of_caller (0.7.2)
-      debug_inspector (>= 0.0.1)
     builder (3.2.2)
     byebug (3.5.1)
       columnize (~> 0.8)
@@ -81,10 +79,14 @@ GEM
       execjs
     coffee-script-source (1.8.0)
     columnize (0.9.0)
-    debug_inspector (0.0.2)
     debugger-linecache (1.2.0)
     erubis (2.7.0)
     execjs (2.2.2)
+    fast_stack (0.1.0)
+      rake
+      rake-compiler
+    flamegraph (0.0.5)
+      fast_stack
     globalid (0.3.0)
       activesupport (>= 4.1.0)
     hike (1.2.3)
@@ -122,6 +124,8 @@ GEM
     rails-html-sanitizer (1.0.1)
       loofah (~> 2.0)
     rake (10.4.2)
+    rake-compiler (0.9.2)
+      rake
     rdoc (4.2.0)
       json (~> 1.4)
     ruby-prof (0.15.2)
@@ -173,6 +177,7 @@ DEPENDENCIES
   byebug
   capybara
   coffee-rails (~> 4.1.0)
+  flamegraph
   jbuilder (~> 2.0)
   jquery-rails
   mocha

test/controllers/documents_controller_test.rb

@@ -1,26 +1,41 @@
 require 'test_helper'
 
 class DocumentsControllerTest < ActionController::TestCase
-  test "creating a new document" do
+  test "index" do
     result = RubyProf.profile do
-      post :create, document: { title: "New things", content: "Doing them" }
+      get :index
+      assert_equal 200, response.status
     end
-    printer = RubyProf::GraphPrinter.new(result)
+    printer = RubyProf::GraphHtmlPrinter.new(result)
     printer.print(STDOUT, {})
-    #post :create, document: { title: "New things", content: "Doing them" }
+  end
 
-    document = Document.last
-    assert_equal 'New things', document.title
-    assert_equal 'Doing them', document.content
+  test "index flame" do
+    Flamegraph.generate("controller_index.html") do
+      get :index
+      assert_equal 200, response.status
+    end
   end
 
-  test "index" do
+  test "create" do
     result = RubyProf.profile do
-      get :index
+      post :create, document: { title: "New things", content: "Doing them" }
+
+      document = Document.last
+      assert_equal 'New things', document.title
+      assert_equal 'Doing them', document.content
     end
-    printer = RubyProf::GraphPrinter.new(result)
+    printer = RubyProf::GraphHtmlPrinter.new(result)
     printer.print(STDOUT, {})
+  end
 
-    assert_equal 200, response.status
+  test "create flame" do
+    Flamegraph.generate("controller_create.html") do
+      post :create, document: { title: "New things", content: "Doing them" }
+
+      document = Document.last
+      assert_equal 'New things', document.title
+      assert_equal 'Doing them', document.content
+    end
   end
 end

test/controllers/documents_integration_test.rb

@@ -1,25 +1,42 @@
 require 'test_helper'
+require 'flamegraph'
 
 class DocumentsIntegrationTest < ActionDispatch::IntegrationTest
-  test "creating a new document" do
+  test "index" do
     result = RubyProf.profile do
-      post documents_url, document: { title: "New things", content: "Doing them" }
+      get '/documents'
+      assert_equal 200, response.status
     end
-    printer = RubyProf::GraphPrinter.new(result)
+    printer = RubyProf::GraphHtmlPrinter.new(result)
     printer.print(STDOUT, {})
+  end
 
-    document = Document.last
-    assert_equal 'New things', document.title
-    assert_equal 'Doing them', document.content
+  test "index flame" do
+    Flamegraph.generate("integration_index.html") do
+      get '/documents'
+      assert_equal 200, response.status
+    end
   end
 
-  test "index" do
+  test "create" do
     result = RubyProf.profile do
-      get documents_url
+      post '/documents', document: { title: "New things", content: "Doing them" }
+
+      document = Document.last
+      assert_equal 'New things', document.title
+      assert_equal 'Doing them', document.content
     end
-    printer = RubyProf::GraphPrinter.new(result)
+    printer = RubyProf::GraphHtmlPrinter.new(result)
     printer.print(STDOUT, {})
+  end
 
-    assert_equal 200, response.status
+  test "create flame" do
+    Flamegraph.generate("integration_create.html") do
+      post '/documents', document: { title: "New things", content: "Doing them" }
+
+      document = Document.last
+      assert_equal 'New things', document.title
+      assert_equal 'Doing them', document.content
+    end
   end
 end