Added Models App, Installation Batch Installation

spec/models/installation_spec.rb

@@ -0,0 +1,32 @@
+require 'rails_helper'
+
+RSpec.describe Installation, type: :model do
+  it { should belong_to(:device) }
+  it { should belong_to(:batch_installation) }
+
+
+
+  # Create Installation Model [Device ID, batch installation ID, status(Pushed, Downloaded, Cancelled, Installed)]
+  describe "Installation status" do
+    let!(:installation){FactoryGirl.create(:installation)}
+    it "Pushed" do
+      installation.pushed!
+      expect(installation.status).to eql Installation.statuses.keys[0]
+    end
+    it "Downloaded" do
+      installation.downloaded!
+      expect(installation.status).to eql Installation.statuses.keys[1]
+    end
+    it "Cancelled" do
+      installation.cancelled!      
+      expect(installation.status).to eql Installation.statuses.keys[2]
+    end
+
+    it "Installed" do
+      installation.installed!
+      expect(installation.status).to eql Installation.statuses.keys[3]
+    end
+   
+  end
+
+end