Add helper tests

spec/helpers/comments_helper_spec.rb

@@ -0,0 +1,62 @@
+require 'rails_helper'
+
+# Specs in this file have access to a helper object that includes
+# the CommentsHelper. For example:
+#
+# describe CommentsHelper do
+#   describe "string concat" do
+#     it "concats two strings with spaces" do
+#       expect(helper.concat_strings("this","that")).to eq("this that")
+#     end
+#   end
+# end
+RSpec.describe CommentsHelper, type: :helper do
+
+  describe '#user_level_class' do
+
+    def comment_double as_administrator: false, as_moderator: false, official: false
+      user = double official?: official, official_level: 'Y'
+      double as_administrator?: as_administrator, as_moderator?: as_moderator, user: user
+    end
+
+    it 'returns is-admin for comment done as administrator' do
+      comment = comment_double(as_administrator: true)
+
+      expect(helper.user_level_class(comment)).to eq('is-admin')
+    end
+
+    it 'returns is-moderator for comment done as moderator' do
+      comment = comment_double(as_moderator: true)
+
+      expect(helper.user_level_class(comment)).to eq('is-moderator')
+    end
+
+    it 'returns level followed by official level if user is official' do
+      comment = comment_double(official: true)
+
+      expect(helper.user_level_class(comment)).to eq('level-Y')
+    end
+
+    it 'returns an empty class otherwise' do
+      comment = comment_double
+
+      expect(helper.user_level_class(comment)).to eq('')
+    end
+  end
+
+  describe '#comment_author_class' do
+    it 'returns is-author if author is the commenting user' do
+      author_id = 42
+      comment = double user_id: author_id
+
+      expect(helper.comment_author_class(comment, author_id)).to eq('is-author')
+    end
+
+    it 'returns an empty string if commenter is not the author' do
+      author_id = 42
+      comment = double user_id: author_id - 1
+
+      expect(helper.comment_author_class(comment, author_id)).to eq('')
+    end
+  end
+end