add token manager test

README.md

@@ -1,5 +1,4 @@
-[![Coverage Status](https://coveralls.io/repos/github/andela-iamadi/zhishi-backend/badge.svg?branch=ft-question-and-socialprov-tests)](https://coveralls.io/github/andela-iamadi/zhishi-backend?branch=ft-question-and-socialprov-tests)
-
+[![Coverage Status](https://coveralls.io/repos/github/andela-iamadi/zhishi-backend/badge.svg?branch=master)](https://coveralls.io/github/andela-iamadi/zhishi-backend?branch=master)
 # Zhishi
 You've definitely being in this situation before:
   > Someone asks you a question;

spec/rails_helper.rb

@@ -75,4 +75,16 @@
     with.test_framework :rspec
     with.library :rails
   end
+
+  class RequestObj
+    def self.headers
+    { "Authorization" => TokenManager.generate_token(1) }
+    end
+  end
+
+  class BadObj
+    def self.headers
+    { "Authorization" => nil }
+    end
+  end
 end

spec/services/token_manager_spec.rb

@@ -0,0 +1,54 @@
+require 'rails_helper'
+RSpec.describe TokenManager do
+  subject(:manager){TokenManager}
+  subject(:request_obj){RequestObj}
+  subject(:bad_obj){BadObj}
+
+  describe "#generate_token" do
+    it "generates token" do
+      expect(manager.generate_token(1).length).to eq 160
+    end
+
+    it "issues token" do
+      payload = { user: 1, exp: (24.hours.from_now).to_i }
+      expect(manager.issue_token(payload).length).to eq 160
+    end
+
+    it "issues secret code" do
+      expect(manager.secret.length).to eq 128
+    end
+  end
+
+  describe "#decode_token" do
+    it "decodes token" do
+      token = request_obj.headers["Authorization"]
+      result = {"typ"=>"JWT", "alg"=>"HS512"}
+      expect(manager.decode(token)).to be_kind_of(Array)
+      expect(manager.decode(token).length).to eq 2
+      expect(manager.decode(token)[1]).to eql (result)
+    end
+  end
+
+  describe "#authenticate" do
+    it "authenticates valid token" do
+      result = {"typ"=>"JWT", "alg"=>"HS512"}
+      expect(manager.authenticate(request_obj)).to be_kind_of(Array)
+      expect(manager.authenticate(request_obj).length).to eq 2
+      expect(manager.authenticate(request_obj)[1]).to eql (result)
+    end
+
+    it "authenticates invalid token" do
+      expect(manager.authenticate(bad_obj)).to be_kind_of(Array)
+      expect(manager.authenticate(bad_obj).length).to eq 2
+      expect(manager.authenticate(bad_obj)).to eql ([nil, 401])
+    end
+
+    it "checks valid token" do
+      expect(manager.token(request_obj).length).to eq 160
+    end
+
+    it "checks invalid token" do
+      expect(manager.token(bad_obj)).to be nil
+    end
+  end
+end