Pick from_address from MailMethod as in Spree

Spree::Config[] picks it up from AppConfiguration rather than MailMethod
and so, gets a value different from the one configured.

app/mailers/spree/base_mailer_decorator.rb

@@ -7,8 +7,11 @@ Spree::BaseMailer.class_eval do
 
   protected
 
+  # This method copies the one defined in Spree's mailers. It should be removed
+  # once in Spree v2.0 and Spree's BaseMailer class lands in our codebase.
+  # Then, we'll be able to rely on its #from_address.
   def from_address
-    Spree::Config[:mails_from] || 'test@example.com'
+    Spree::MailMethod.current.preferred_mails_from
   end
 
   def roadie_options

spec/controllers/user_passwords_controller_spec.rb

@@ -31,12 +31,16 @@ describe UserPasswordsController, type: :controller do
   end
 
   it "renders Darkswarm" do
+    Spree::MailMethod.create!(environment: 'test')
     clear_jobs
+
     user.send_reset_password_instructions
     flush_jobs # Send the reset password instructions
+
     user.reload
     spree_get :edit, reset_password_token: user.reset_password_token
-    response.should render_template "user_passwords/edit"
+
+    expect(response).to render_template "user_passwords/edit"
   end
 
   describe "via ajax" do

spec/mailers/enterprise_mailer_spec.rb

@@ -5,12 +5,14 @@ describe EnterpriseMailer do
 
   before do
     ActionMailer::Base.deliveries = []
+    Spree::MailMethod.create!(environment: 'test')
   end
 
-  it "should send a welcome email when given an enterprise" do
+  it "sends a welcome email when given an enterprise" do
     EnterpriseMailer.welcome(enterprise).deliver
-    ActionMailer::Base.deliveries.count.should == 1
+
     mail = ActionMailer::Base.deliveries.first
-    expect(mail.subject).to eq "#{enterprise.name} is now on #{Spree::Config[:site_name]}"
+    expect(mail.subject)
+      .to eq "#{enterprise.name} is now on #{Spree::Config[:site_name]}"
   end
 end

spec/mailers/user_mailer_spec.rb

@@ -11,6 +11,8 @@ describe Spree::UserMailer do
     ActionMailer::Base.delivery_method = :test
     ActionMailer::Base.perform_deliveries = true
     ActionMailer::Base.deliveries = []
+
+    Spree::MailMethod.create!(environment: 'test')
   end
 
   it "sends an email when given a user" do