Updated deps

vendor/github.com/docker/distribution/notifications/metrics_test.go

@@ -0,0 +1,28 @@
+package notifications
+
+import (
+	"encoding/json"
+	"expvar"
+	"testing"
+)
+
+func TestMetricsExpvar(t *testing.T) {
+	endpointsVar := expvar.Get("registry").(*expvar.Map).Get("notifications").(*expvar.Map).Get("endpoints")
+
+	var v interface{}
+	if err := json.Unmarshal([]byte(endpointsVar.String()), &v); err != nil {
+		t.Fatalf("unexpected error unmarshaling endpoints: %v", err)
+	}
+	if v != nil {
+		t.Fatalf("expected nil, got %#v", v)
+	}
+
+	NewEndpoint("x", "y", EndpointConfig{})
+
+	if err := json.Unmarshal([]byte(endpointsVar.String()), &v); err != nil {
+		t.Fatalf("unexpected error unmarshaling endpoints: %v", err)
+	}
+	if slice, ok := v.([]interface{}); !ok || len(slice) != 1 {
+		t.Logf("expected one-element []interface{}, got %#v", v)
+	}
+}