Adding e-mail notifications about mentions, follows, favourites and reblogs. Fixing another mention recording bug

spec/mailers/notification_mailer_spec.rb

@@ -0,0 +1,61 @@
+require "rails_helper"
+
+RSpec.describe NotificationMailer, type: :mailer do
+  let(:receiver)       { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let(:sender)         { Fabricate(:account, username: 'bob') }
+  let(:foreign_status) { Fabricate(:status, account: sender) }
+  let(:own_status)     { Fabricate(:status, account: receiver.account) }
+
+  describe "mention" do
+    let(:mail) { NotificationMailer.mention(receiver.account, foreign_status) }
+
+    it "renders the headers" do
+      expect(mail.subject).to eq("You were mentioned by bob")
+      expect(mail.to).to eq([receiver.email])
+    end
+
+    it "renders the body" do
+      expect(mail.body.encoded).to match("You were mentioned by bob")
+    end
+  end
+
+  describe "follow" do
+    let(:mail) { NotificationMailer.follow(receiver.account, sender) }
+
+    it "renders the headers" do
+      expect(mail.subject).to eq("bob is now following you")
+      expect(mail.to).to eq([receiver.email])
+    end
+
+    it "renders the body" do
+      expect(mail.body.encoded).to match("bob is now following you")
+    end
+  end
+
+  describe "favourite" do
+    let(:mail) { NotificationMailer.favourite(own_status, sender) }
+
+    it "renders the headers" do
+      expect(mail.subject).to eq("bob favourited your status")
+      expect(mail.to).to eq([receiver.email])
+    end
+
+    it "renders the body" do
+      expect(mail.body.encoded).to match("Your status was favourited by bob")
+    end
+  end
+
+  describe "reblog" do
+    let(:mail) { NotificationMailer.reblog(own_status, sender) }
+
+    it "renders the headers" do
+      expect(mail.subject).to eq("bob reblogged your status")
+      expect(mail.to).to eq([receiver.email])
+    end
+
+    it "renders the body" do
+      expect(mail.body.encoded).to match("Your status was reblogged by bob")
+    end
+  end
+
+end