Update specs to new rspec syntax

spec/views/tracks/new.html.haml_spec.rb

@@ -11,23 +11,24 @@ describe 'tracks/new' do
 
   it 'renders a form to create a track' do
     render
-    rendered.should have_selector("form[method=post][action='#{tracks_path}']")
-    rendered.should have_selector('input[type=submit]')
+    expect(rendered)
+      .to have_selector "form[method=post][action='#{tracks_path}']"
+    expect(rendered).to have_selector 'input[type=submit]'
   end
 
   it 'renders a text field with a label for the playlists name' do
-    track.stub(name: 'Mega song')
+    allow(track).to receive(:name) { 'Mega song' }
     render
-    rendered.should have_selector(
-      "input[type=text][name='track[name]'][value='Mega song']"
-    )
-    rendered.should have_selector('label[for=track_name]', text: 'Name')
+    expect(rendered)
+      .to have_selector "input[type=text][name='track[name]'][value='Mega song']"
+    expect(rendered)
+      .to have_selector('label[for=track_name]', text: 'Name')
   end
 
   it 'renders a file field with a label for the tracks file' do
     render
-    rendered.should have_selector("form[enctype='multipart/form-data']")
-    rendered.should have_selector("input[type=file][name='track[file]']")
-    rendered.should have_selector('label[for=track_file]', text: 'File')
+    expect(rendered).to have_selector("form[enctype='multipart/form-data']")
+    expect(rendered).to have_selector("input[type=file][name='track[file]']")
+    expect(rendered).to have_selector('label[for=track_file]', text: 'File')
   end
 end

spec/views/tracks/show.html.haml_spec.rb

@@ -9,7 +9,7 @@ describe 'tracks/show' do
 
   it 'displays the name of the track' do
     render
-    rendered.should have_selector('h1', text: 'Mega song')
+    expect(rendered).to have_selector 'h1', text: 'Mega song'
   end
 
   context 'when track has a sound' do
@@ -17,22 +17,22 @@ describe 'tracks/show' do
 
     it 'provides an audio stream for the track' do
       render
-      rendered.should have_selector('audio[src]')
+      expect(rendered).to have_selector 'audio[src]'
     end
 
     it 'provides controls' do
       render
-      rendered.should have_selector('audio[controls]')
+      expect(rendered).to have_selector 'audio[controls]'
     end
 
     it 'has autoplay activated' do
       render
-      rendered.should have_selector('audio[autoplay]')
+      expect(rendered).to have_selector 'audio[autoplay]'
     end
 
     it 'displays a text fallback for UA without support' do
       render
-      rendered.should have_selector(
+      expect(rendered).to have_selector(
         'audio',
         text: 'Your browser does not support the audio element'
       )