Haven't figured out why reset password email body is blank, but I pulled it into a controller test so we can figure it out there instead of in a cucumber feature.

spec/controllers/devise/passwords_controller_spec.rb

@@ -0,0 +1,45 @@
+#   Copyright (c) 2010, Diaspora Inc.  This file is
+#   licensed under the Affero General Public License version 3 or later.  See
+#   the COPYRIGHT file.
+
+require 'spec_helper'
+
+describe Devise::PasswordsController do
+  include Devise::TestHelpers
+
+  before do
+    @request.env["devise.mapping"] = Devise.mappings[:user]
+  end
+  
+  describe "#create" do
+    context "when there is no such user" do
+      it "succeeds" do
+        post :create, "user" => {"email" => "foo@example.com"}
+        response.should be_success
+      end
+      it "doesn't send email" do
+        expect {
+          post :create, "user" => {"email" => "foo@example.com"}
+        }.to change(Devise.mailer.deliveries, :length).by(0)
+      end
+    end
+    context "when there is a user with that email" do
+      it "redirects to the login page" do
+        post :create, "user" => {"email" => alice.email}
+        response.should redirect_to(new_user_session_path)
+      end
+      it "sends email" do
+        expect {
+          post :create, "user" => {"email" => alice.email}
+        }.to change(Devise.mailer.deliveries, :length).by(1)
+      end
+      it "sends email with a non-blank body" do
+        post :create, "user" => {"email" => alice.email}
+        email = Devise.mailer.deliveries.last
+        email_body = email.body.to_s
+        email_body = email.html_part.body.raw_source if email_body.blank? && email.html_part.present?
+        email_body.should_not be_blank
+      end  
+    end
+  end
+end