Dictionary show action for letters, alphabetical links helper

spec/helpers/dictionary_helper_spec.rb

@@ -0,0 +1,36 @@
+require 'rails_helper'
+
+include Capybara::RSpecMatchers
+
+# Specs in this file have access to a helper object that includes
+# the DictionaryHelper. For example:
+#
+# describe DictionaryHelper 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 DictionaryHelper, type: :helper do
+
+  describe "#alphabetical_links" do
+
+    it "generates fourteen letter-links" do
+      expect(helper.alphabetical_links).to have_selector(%(a), count: 14)
+    end
+
+    it "generates links for all fourteen letters" do
+      output = helper.alphabetical_links
+      letters = ['i', 'u', 'e', 'o', 'a', 'm', 'n', 'p', 't', 'k', 's', 'w', 'l', 'j']
+
+      letters.each do |l|
+        expect(output).to have_link(l, href: dictionary_path(l))
+      end
+    end
+
+    it "sorts the toki pona alphabet" do
+      expect(DictionaryHelper::LETTERS).to eql(DictionaryHelper::LETTERS.sort)
+    end
+  end
+end