Create new email template for new evaluation comment created and add it to system_emails view

spec/lib/evaluation_comment_email_spec.rb

@@ -0,0 +1,57 @@
+require "rails_helper"
+
+describe EvaluationCommentEmail do
+
+  let(:author)        { create(:user) }
+  let(:administrator) { create(:administrator)}
+  let(:investment)    { create(:budget_investment, author: author, administrator: administrator) }
+  let(:commenter)     { create(:user, email: "email@commenter.org") }
+  let(:comment)       { create(:comment, commentable: investment, user: commenter) }
+  let(:comment_email) { EvaluationCommentEmail.new(comment) }
+
+  describe "#commentable" do
+    it "returns the commentable object that contains the replied comment" do
+      expect(comment_email.commentable).to eq investment
+    end
+  end
+
+  describe "#to" do
+    it "returns an array of users related to investment" do
+      expect(comment_email.to).to eq [administrator]
+    end
+
+    it "returns empty array if commentable not exists" do
+      allow(comment).to receive(:commentable).and_return(nil)
+      expect(comment_email.to).to eq []
+    end
+
+    it "returns empty array if not associated users" do
+      allow(investment).to receive(:admin_and_valuator_users_associated).and_return([])
+      expect(comment_email.to).to eq []
+    end
+  end
+
+  describe "#subject" do
+    it "returns the translation for a evaluation comment email subject" do
+      expect(comment_email.subject).to eq "New evaluation comment"
+    end
+  end
+
+  describe "#can_be_sent?" do
+    it "returns true if investment has any associated users" do
+      expect(comment_email.can_be_sent?).to be true
+    end
+
+    it "returns false if the comment doesn't exist" do
+      comment.update(commentable: nil)
+
+      expect(comment_email.can_be_sent?).to be false
+    end
+
+    it "returns false if recipients are empty" do
+      investment.administrator = nil
+      expect(comment_email.can_be_sent?).to be false
+    end
+  end
+
+end