Test Singleton Resources (#16)

This functionality isn't covered by any existing unit tests, so add in a
basic test to ensure it works and is guarded.

Author: spjmurray

test/unit/fixtures/fixtures.go

@@ -37,6 +37,9 @@ const (
 	// ServiceInstanceName is a name to use for a service instance.
 	ServiceInstanceName = "pinkiepie"
 
+	// AlternateServiceInstanceName is a name to use for another service instance.
+	AlternateServiceInstanceName = "rainbowdash"
+
 	// ServiceBindingName is a name to use for a service binding.
 	ServiceBindingName = "spike"
 
@@ -128,10 +131,14 @@ var (
 				},
 			},
 			{
-				Name: "test-template",
-				// Populated by the configuration function.
+				Name:     "test-template",
 				Template: &runtime.RawExtension{Raw: []byte(`{"apiVersion":"v1","kind":"Pod","metadata":{"name":"{{registry \"instance-name\" | json}}"},"spec":{"containers":[{"name":"image","image":"name/image:tag"}],"automountServiceAccountToken":"{{true | json}}","priority":"{{0 | json}}","dnsConfig":"{{snippet \"dns-snippet\" | json}}","hostname":"{{parameter \"/hostname\" | json}}"}}`)},
 			},
+			{
+				Name:      "test-singleton",
+				Singleton: true,
+				Template:  &runtime.RawExtension{Raw: []byte(`{"apiVersion":"v1","kind":"Pod","metadata":{"name":"singleton"}}`)},
+			},
 		},
 		Bindings: []v1.ConfigurationBinding{
 			{
@@ -151,6 +158,7 @@ var (
 					},
 					Templates: []string{
 						"test-template",
+						"test-singleton",
 					},
 				},
 				ServiceBinding: &v1.ServiceBrokerTemplateList{

test/unit/serviceinstance_test.go

@@ -37,6 +37,20 @@ func TestServiceInstanceCreate(t *testing.T) {
 	util.MustCreateServiceInstanceSuccessfully(t, fixtures.ServiceInstanceName, req)
 }
 
+// TestServiceInstanceCreateSingleton tests that the service broker accepts a
+// minimal service instance creation and allows multiple instances sharing  a
+// singleton resource.
+func TestServiceInstanceCreateSingleton(t *testing.T) {
+	defer mustReset(t)
+
+	configuration := fixtures.BasicConfiguration()
+	util.MustReplaceBrokerConfig(t, clients, configuration)
+
+	req := fixtures.BasicServiceInstanceCreateRequest()
+	util.MustCreateServiceInstanceSuccessfully(t, fixtures.ServiceInstanceName, req)
+	util.MustCreateServiceInstanceSuccessfully(t, fixtures.AlternateServiceInstanceName, req)
+}
+
 // TestServiceInstanceCreateNotAynchronous tests that the service broker rejects service
 // instance creation that isn't asynchronous.
 func TestServiceInstanceCreateNotAynchronous(t *testing.T) {