Add email_spec and speedup/cleanup to spec/mailers (#27902)

spec/mailers/admin_mailer_spec.rb

@@ -13,14 +13,13 @@ RSpec.describe AdminMailer do
       recipient.user.update(locale: :en)
     end
 
-    it 'renders the headers' do
-      expect(mail.subject).to eq("New report for cb6e6126.ngrok.io (##{report.id})")
-      expect(mail.to).to eq [recipient.user_email]
-      expect(mail.from).to eq ['notifications@localhost']
-    end
-
-    it 'renders the body' do
-      expect(mail.body.encoded).to eq("Mike,\r\n\r\nJohn has reported Mike\r\n\r\nView: https://cb6e6126.ngrok.io/admin/reports/#{report.id}\r\n")
+    it 'renders the email' do
+      expect(mail)
+        .to be_present
+        .and(deliver_to(recipient.user_email))
+        .and(deliver_from('notifications@localhost'))
+        .and(have_subject("New report for cb6e6126.ngrok.io (##{report.id})"))
+        .and(have_body_text("Mike,\r\n\r\nJohn has reported Mike\r\n\r\nView: https://cb6e6126.ngrok.io/admin/reports/#{report.id}\r\n"))
     end
   end
 
@@ -33,14 +32,13 @@ RSpec.describe AdminMailer do
       recipient.user.update(locale: :en)
     end
 
-    it 'renders the headers' do
-      expect(mail.subject).to eq("#{appeal.account.username} is appealing a moderation decision on cb6e6126.ngrok.io")
-      expect(mail.to).to eq [recipient.user_email]
-      expect(mail.from).to eq ['notifications@localhost']
-    end
-
-    it 'renders the body' do
-      expect(mail.body.encoded).to match "#{appeal.account.username} is appealing a moderation decision by #{appeal.strike.account.username}"
+    it 'renders the email' do
+      expect(mail)
+        .to be_present
+        .and(deliver_to(recipient.user_email))
+        .and(deliver_from('notifications@localhost'))
+        .and(have_subject("#{appeal.account.username} is appealing a moderation decision on cb6e6126.ngrok.io"))
+        .and(have_body_text("#{appeal.account.username} is appealing a moderation decision by #{appeal.strike.account.username}"))
     end
   end
 
@@ -53,14 +51,13 @@ RSpec.describe AdminMailer do
       recipient.user.update(locale: :en)
     end
 
-    it 'renders the headers' do
-      expect(mail.subject).to eq("New account up for review on cb6e6126.ngrok.io (#{user.account.username})")
-      expect(mail.to).to eq [recipient.user_email]
-      expect(mail.from).to eq ['notifications@localhost']
-    end
-
-    it 'renders the body' do
-      expect(mail.body.encoded).to match 'The details of the new account are below. You can approve or reject this application.'
+    it 'renders the email' do
+      expect(mail)
+        .to be_present
+        .and(deliver_to(recipient.user_email))
+        .and(deliver_from('notifications@localhost'))
+        .and(have_subject("New account up for review on cb6e6126.ngrok.io (#{user.account.username})"))
+        .and(have_body_text('The details of the new account are below. You can approve or reject this application.'))
     end
   end
 
@@ -75,14 +72,13 @@ RSpec.describe AdminMailer do
       recipient.user.update(locale: :en)
     end
 
-    it 'renders the headers' do
-      expect(mail.subject).to eq('New trends up for review on cb6e6126.ngrok.io')
-      expect(mail.to).to eq [recipient.user_email]
-      expect(mail.from).to eq ['notifications@localhost']
-    end
-
-    it 'renders the body' do
-      expect(mail.body.encoded).to match 'The following items need a review before they can be displayed publicly'
+    it 'renders the email' do
+      expect(mail)
+        .to be_present
+        .and(deliver_to(recipient.user_email))
+        .and(deliver_from('notifications@localhost'))
+        .and(have_subject('New trends up for review on cb6e6126.ngrok.io'))
+        .and(have_body_text('The following items need a review before they can be displayed publicly'))
     end
   end
 
@@ -94,14 +90,13 @@ RSpec.describe AdminMailer do
       recipient.user.update(locale: :en)
     end
 
-    it 'renders the headers' do
-      expect(mail.subject).to eq('New Mastodon versions are available for cb6e6126.ngrok.io!')
-      expect(mail.to).to eq [recipient.user_email]
-      expect(mail.from).to eq ['notifications@localhost']
-    end
-
-    it 'renders the body' do
-      expect(mail.body.encoded).to match 'New Mastodon versions have been released, you may want to update!'
+    it 'renders the email' do
+      expect(mail)
+        .to be_present
+        .and(deliver_to(recipient.user_email))
+        .and(deliver_from('notifications@localhost'))
+        .and(have_subject('New Mastodon versions are available for cb6e6126.ngrok.io!'))
+        .and(have_body_text('New Mastodon versions have been released, you may want to update!'))
     end
   end
 
@@ -113,18 +108,16 @@ RSpec.describe AdminMailer do
       recipient.user.update(locale: :en)
     end
 
-    it 'renders the headers', :aggregate_failures do
-      expect(mail.subject).to eq('Critical Mastodon updates are available for cb6e6126.ngrok.io!')
-      expect(mail.to).to eq [recipient.user_email]
-      expect(mail.from).to eq ['notifications@localhost']
-
-      expect(mail['Importance'].value).to eq 'high'
-      expect(mail['Priority'].value).to eq 'urgent'
-      expect(mail['X-Priority'].value).to eq '1'
-    end
-
-    it 'renders the body' do
-      expect(mail.body.encoded).to match 'New critical versions of Mastodon have been released, you may want to update as soon as possible!'
+    it 'renders the email' do
+      expect(mail)
+        .to be_present
+        .and(deliver_to(recipient.user_email))
+        .and(deliver_from('notifications@localhost'))
+        .and(have_subject('Critical Mastodon updates are available for cb6e6126.ngrok.io!'))
+        .and(have_body_text('New critical versions of Mastodon have been released, you may want to update as soon as possible!'))
+        .and(have_header('Importance', 'high'))
+        .and(have_header('Priority', 'urgent'))
+        .and(have_header('X-Priority', '1'))
     end
   end
 end