Complete refactor to new grpc control plane and only http proxy for carts (#4)

Co-authored-by: matst80 <mats.tornberg@gmail.com>
Reviewed-on: https://git.tornberg.me/mats/go-cart-actor/pulls/4
Co-authored-by: Mats Törnberg <mats@tornberg.me>
Co-committed-by: Mats Törnberg <mats@tornberg.me>

pkg/discovery/discovery_test.go

@@ -0,0 +1,51 @@
+package discovery
+
+import (
+	"testing"
+	"time"
+
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+func TestDiscovery(t *testing.T) {
+	config, err := clientcmd.BuildConfigFromFlags("", "/home/mats/.kube/config")
+	if err != nil {
+		t.Errorf("Error building config: %v", err)
+	}
+	client, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		t.Errorf("Error creating client: %v", err)
+	}
+	d := NewK8sDiscovery(client)
+	res, err := d.DiscoverInNamespace("")
+	if err != nil {
+		t.Errorf("Error discovering: %v", err)
+	}
+	if len(res) == 0 {
+		t.Errorf("Expected at least one host, got none")
+	}
+}
+
+func TestWatch(t *testing.T) {
+	config, err := clientcmd.BuildConfigFromFlags("", "/home/mats/.kube/config")
+	if err != nil {
+		t.Errorf("Error building config: %v", err)
+	}
+	client, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		t.Errorf("Error creating client: %v", err)
+	}
+	d := NewK8sDiscovery(client)
+	ch, err := d.Watch()
+	if err != nil {
+		t.Errorf("Error watching: %v", err)
+	}
+
+	select {
+	case m := <-ch:
+		t.Logf("Received watch %v", m)
+	case <-time.After(5 * time.Second):
+		t.Errorf("Timeout waiting for watch")
+	}
+}