f pool_manager_snapshot_spec

spec/vmpooler/pool_manager_snapshot_spec.rb

@@ -0,0 +1,83 @@
+require 'spec_helper'
+require 'time'
+
+describe 'Pool Manager' do
+  let(:logger) { double('logger') }
+  let(:redis) { double('redis') }
+  let(:metrics) { Vmpooler::DummyStatsd.new }
+  let(:config) { {} }
+  let(:pool) { 'pool1' }
+  let(:vm) { 'vm1' }
+  let(:timeout) { 5 }
+  let(:host) { double('host') }
+
+  subject { Vmpooler::PoolManager.new(config, logger, redis, metrics) }
+
+  describe '#_create_vm_snapshot' do
+    let(:snapshot_manager) { 'snapshot_manager' }
+    let(:pool_helper) { double('snapshot_manager') }
+    let(:backingservice) { {snapshot_manager => pool_helper} }
+
+    before do
+      expect(subject).not_to be_nil
+      $backingservice = backingservice
+    end
+
+    context '(valid host)' do
+      let(:vm_host) { double('vmhost') }
+
+      it 'creates a snapshot' do
+        expect(backingservice).to receive(:get_vm).and_return vm_host
+        expect(logger).to receive(:log)
+        expect(vm_host).to receive_message_chain(:CreateSnapshot_Task, :wait_for_completion)
+        expect(redis).to receive(:hset).with('vmpooler__vm__testvm', 'snapshot:testsnapshot', Time.now.to_s)
+        expect(logger).to receive(:log)
+
+        subject._create_vm_snapshot('testvm', 'testsnapshot', backingservice)
+      end
+    end
+  end
+
+  describe '#_revert_vm_snapshot' do
+    let(:snapshot_manager) { 'snapshot_manager' }
+    let(:pool_helper) { double('snapshot_manager') }
+    let(:backingservice) { {snapshot_manager => pool_helper} }
+
+    before do
+      expect(subject).not_to be_nil
+      $backingservice = backingservice
+    end
+
+    context '(valid host)' do
+      let(:vm_host) { double('vmhost') }
+      let(:vm_snapshot) { double('vmsnapshot') }
+
+      it 'reverts a snapshot' do
+        expect(backingservice).to receive(:get_vm).and_return vm_host
+        expect(backingservice).to receive(:find_snapshot).and_return vm_snapshot
+        expect(logger).to receive(:log)
+        expect(vm_snapshot).to receive_message_chain(:RevertToSnapshot_Task, :wait_for_completion)
+        expect(logger).to receive(:log)
+
+        subject._revert_vm_snapshot('testvm', 'testsnapshot', backingservice)
+      end
+    end
+  end
+
+  describe '#_check_snapshot_queue' do
+    let(:pool_helper) { double('pool') }
+    let(:backingservice) { {pool => pool_helper} }
+
+    before do
+      expect(subject).not_to be_nil
+      $backingservice = backingservice
+    end
+
+    it 'checks appropriate redis queues' do
+      expect(redis).to receive(:spop).with('vmpooler__tasks__snapshot')
+      expect(redis).to receive(:spop).with('vmpooler__tasks__snapshot-revert')
+
+      subject._check_snapshot_queue(backingservice)
+    end
+  end
+end