sends notification email to each voter

spec/features/emails_spec.rb

@@ -148,4 +148,40 @@ feature 'Emails' do
     expect(email).to have_body_text(spending_proposal.feasible_explanation)
   end
 
+  scenario "Proposal notification" do
+    author = create(:user)
+
+    noelia = create(:user)
+    vega = create(:user)
+    cristina = create(:user)
+
+    proposal = create(:proposal, author: author)
+
+    create(:vote, voter: noelia, votable: proposal, vote_flag: true)
+    create(:vote, voter: vega,   votable: proposal, vote_flag: true)
+
+    reset_mailer
+
+    login_as(author)
+    visit root_path
+
+    visit new_proposal_notification_path(proposal_id: proposal.id)
+
+    fill_in 'proposal_notification_title', with: "Thank you for supporting my proposal"
+    fill_in 'proposal_notification_body', with: "Please share it with others so we can make it happen!"
+    click_button "Send"
+
+    expect(page).to have_content "Your message has been sent correctly."
+
+    expect(unread_emails_for(noelia.email).size).to   eql parse_email_count(1)
+    expect(unread_emails_for(vega.email).size).to     eql parse_email_count(1)
+    expect(unread_emails_for(cristina.email).size).to eql parse_email_count(0)
+    expect(unread_emails_for(author.email).size).to   eql parse_email_count(0)
+
+    email = open_last_email
+    expect(email).to have_subject("Thank you for supporting my proposal")
+    expect(email).to have_body_text("Please share it with others so we can make it happen!")
+    expect(email).to have_body_text(proposal.title)
+  end
+
 end