Add tests for Answer Model

spec/models/answer_spec.rb

@@ -0,0 +1,16 @@
+require 'spec_helper'
+
+describe Answer do
+  describe 'association' do
+    it { should have_many :qanswers }
+    it { should have_many(:questions).through(:qanswers) }
+  end
+
+  describe 'validation' do
+    it 'has valid factory' do
+      expect(build(:answer)).to be_valid
+    end
+
+    it{ is_expected.to validate_presence_of(:title) }
+  end
+end