[astute] Unit tests for deployment_engine base class

astute/lib/astute/orchestrator.rb

@@ -14,6 +14,7 @@ module Astute
     end
 
     def deploy(reporter, task_id, nodes, attrs)
+      raise "Nodes to deploy are not provided!" if nodes.empty?
       context = Context.new(task_id, reporter)
       deploy_engine_instance = @deploy_engine.new(context)
       deploy_engine_instance.deploy(nodes, attrs)

astute/spec/unit/deployment_engine_spec.rb

@@ -0,0 +1,29 @@
+#!/usr/bin/env rspec
+require File.join(File.dirname(__FILE__), "..", "spec_helper")
+
+describe "DeploymentEngine" do
+  context "When deploy is called, it" do
+    before(:each) do
+      @ctx = mock
+      @deploy_engine = Astute::DeploymentEngine.new(@ctx)
+    end
+
+    it "should call valid method depends on attrs" do
+      nodes = [{'uid' => 1}]
+      attrs = {'deployment_mode' => 'ha_compute'}
+      attrs_modified = attrs.merge({'some' => 'somea'})
+      
+      @deploy_engine.expects(:attrs_ha_compute).with(nodes, attrs).returns(attrs_modified)
+      @deploy_engine.expects(:deploy_ha_compute).with(nodes, attrs_modified)
+      # All implementations of deploy_piece go to subclasses
+      @deploy_engine.respond_to?(:deploy_piece).should be_false
+      @deploy_engine.deploy(nodes, attrs)
+    end
+
+    it "should raise an exception if deployment mode is unsupported" do
+      nodes = [{'uid' => 1}]
+      attrs = {'deployment_mode' => 'unknown'}
+      expect {@deploy_engine.deploy(nodes, attrs)}.to raise_exception(/Method attrs_unknown is not implemented/)
+    end
+  end
+end