Call deliver_now! on mail when using assert_emails

These tests were previously passing by accident, because we were never
actually attempting to deliver the mail.

test/mailers/album_mailer_test.rb

@@ -24,14 +24,14 @@ class AlbumMailerTest < ActionMailer::TestCase
 
   test '#published does not send email if album has no associated user' do
     @album.artist.update!(user: nil)
-    AlbumMailer.with(album: @album).published
+    AlbumMailer.with(album: @album).published.deliver_now!
     assert_emails 0
   end
 
   test '#published does not send email if associated user has sending suppressed' do
     user = create(:user, sending_suppressed_at: Time.current)
     user.artists << @album.artist
-    AlbumMailer.with(album: @album).published
+    AlbumMailer.with(album: @album).published.deliver_now!
     assert_emails 0
   end
 end

test/mailers/interests_mailer_test.rb

@@ -16,7 +16,7 @@ class InterestsMailerTest < ActionMailer::TestCase
 
   test 'do not send interest confirmation email if sending is suppressed' do
     interest = create(:interest, sending_suppressed_at: Time.current)
-    InterestsMailer.confirm(interest)
+    InterestsMailer.confirm(interest).deliver_now!
     assert_emails 0
   end
 end

test/mailers/purchase_mailer_test.rb

@@ -17,7 +17,7 @@ class PurchaseMailerTest < ActionMailer::TestCase
 
   test 'do not send purchase completed email if sending is suppressed' do
     purchase = create(:purchase, customer_email: '[email protected]', sending_suppressed_at: Time.current)
-    PurchaseMailer.with(purchase:).completed.deliver_now
+    PurchaseMailer.with(purchase:).completed.deliver_now!
     assert_emails 0
   end
 
@@ -39,7 +39,7 @@ class PurchaseMailerTest < ActionMailer::TestCase
     album = build(:album, artist:)
     purchase = build(:purchase, album:, price: 7.00)
 
-    PurchaseMailer.with(purchase:).notify_artist
+    PurchaseMailer.with(purchase:).notify_artist.deliver_now!
     assert_emails 0
   end
 

test/mailers/user_mailer_test.rb

@@ -15,7 +15,7 @@ class UserMailerTest < ActionMailer::TestCase
 
   test 'does not send password reset if user has sending suppressed' do
     @user.update!(sending_suppressed_at: Time.current)
-    UserMailer.with(user: @user).password_reset
+    UserMailer.with(user: @user).password_reset.deliver_now!
     assert_emails 0
   end
 
@@ -27,7 +27,7 @@ class UserMailerTest < ActionMailer::TestCase
 
   test 'does not send email verification if user has sending suppressed' do
     @user.update!(sending_suppressed_at: Time.current)
-    UserMailer.with(user: @user).email_verification
+    UserMailer.with(user: @user).email_verification.deliver_now!
     assert_emails 0
   end
 end