added test coverage for assigning Vm#ems_created_on field

spec/models/vm_or_template_spec.rb

@@ -618,22 +618,45 @@
     end
   end
 
+  describe "#assign_ems_created_on_queue" do
+    it "queuing task to execute 'assign_ems_created_on' on server with 'ems_operations' role" do
+      expect(MiqQueue).to receive(:submit_job).with(
+        :class_name  => described_class.name,
+        :method_name => 'assign_ems_created_on',
+        :role        => 'ems_operations',
+        :args        => [vm.id],
+        :priority    => MiqQueue::MIN_PRIORITY
+      )
+      described_class.assign_ems_created_on_queue(vm.id)
+    end
+  end
+
+  describe "assign_ems_created_on" do
+    it "assigns timestamp on `VmDeployedEvent` event to `vm#ems_created_on field " do
+      timestamp = Time.now.utc.change(:usec => 0)
+      FactoryBot.create(:ems_event, :event_type => "VmDeployedEvent", :dest_vm_or_template => vm, :timestamp => timestamp)
+      described_class.assign_ems_created_on(vm.id)
+      expect(vm.reload.ems_created_on.utc).to eq(timestamp)
+    end
+  end
+
   it "with ems_events" do
-    ems           = FactoryBot.create(:ems_vmware_with_authentication)
-    vm            = FactoryBot.create(:vm_vmware, :ext_management_system => ems)
-    ems_event_src = FactoryBot.create(:ems_event, :vm_or_template => vm)
+    ems            = FactoryBot.create(:ems_vmware_with_authentication)
+    vm             = FactoryBot.create(:vm_vmware, :ext_management_system => ems)
+    ems_event_src  = FactoryBot.create(:ems_event, :vm_or_template => vm)
     ems_event_dest = FactoryBot.create(:ems_event, :dest_vm_or_template => vm)
 
     expect(vm.ems_events.count).to eq(2)
-    expect(vm.ems_events_src.first).to be_kind_of(EmsEvent)
-    expect(vm.ems_events_src.first.id).to eq(ems_event_src.id)
+    #expect(vm.ems_events_src.first).to be_kind_of(EmsEvent)
+    #expect(vm.ems_events_src.first.id).to eq(ems_event_src.id)
+    expect(vm.ems_events_src.first).to eq(ems_event_src)
     expect(vm.ems_events_dest.first.id).to eq(ems_event_dest.id)
   end
 
   it "#miq_provision_vms" do
-    ems       = FactoryBot.create(:ems_vmware_with_authentication)
-    template  = FactoryBot.create(:template_vmware, :ext_management_system => ems)
-    vm        = FactoryBot.create(:vm_vmware, :ext_management_system => ems)
+    ems      = FactoryBot.create(:ems_vmware_with_authentication)
+    template = FactoryBot.create(:template_vmware, :ext_management_system => ems)
+    vm       = FactoryBot.create(:vm_vmware, :ext_management_system => ems)
 
     options = {
       :vm_name        => vm.name,