Add tests for eventing/v1alpha1/register.go (#595)

* Add tests for eventing/v1alpha1/register.go

* address pr feedback

pkg/apis/eventing/v1alpha1/register_test.go

@@ -0,0 +1,69 @@
+/*
+Copyright 2018 The Knative Authors
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package v1alpha1
+
+import (
+	"github.com/google/go-cmp/cmp"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"testing"
+)
+
+// Resource takes an unqualified resource and returns a Group qualified GroupResource
+func TestResource(t *testing.T) {
+	want := schema.GroupResource{
+		Group:    "eventing.knative.dev",
+		Resource: "foo",
+	}
+
+	got := Resource("foo")
+
+	if diff := cmp.Diff(want, got); diff != "" {
+		t.Errorf("unexpected resource (-want, +got) = %v", diff)
+	}
+}
+
+// Kind takes an unqualified resource and returns a Group qualified GroupKind
+func TestKind(t *testing.T) {
+	want := schema.GroupKind{
+		Group: "eventing.knative.dev",
+		Kind:  "kind",
+	}
+
+	got := Kind("kind")
+
+	if diff := cmp.Diff(want, got); diff != "" {
+		t.Errorf("unexpected resource (-want, +got) = %v", diff)
+	}
+}
+
+// TestKnownTypes makes sure that expected types get added.
+func TestKnownTypes(t *testing.T) {
+	scheme := runtime.NewScheme()
+	addKnownTypes(scheme)
+	types := scheme.KnownTypes(SchemeGroupVersion)
+
+	for _, name := range []string{
+		"Channel",
+		"ChannelList",
+		"ClusterChannelProvisioner",
+		"ClusterChannelProvisionerList",
+		"Subscription",
+		"SubscriptionList",
+	} {
+		if _, ok := types[name]; !ok {
+			t.Errorf("Did not find %q as registered type", name)
+		}
+	}
+
+}