diff --git a/pkg/controller/router_test.go b/pkg/controller/router_test.go
new file mode 100644
index 00000000..4c7f898b
--- /dev/null
+++ b/pkg/controller/router_test.go
@@ -0,0 +1,177 @@
+package controller
+
+import (
+	"fmt"
+	"testing"
+
+	istiov1alpha3 "github.com/knative/pkg/apis/istio/v1alpha3"
+	fakeIstio "github.com/knative/pkg/client/clientset/versioned/fake"
+	fakeFlagger "github.com/stefanprodan/flagger/pkg/client/clientset/versioned/fake"
+	"github.com/stefanprodan/flagger/pkg/logging"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes/fake"
+)
+
+func TestCanaryRouter_Sync(t *testing.T) {
+	canary := newTestCanary()
+	dep := newTestDeployment()
+	hpa := newTestHPA()
+
+	flaggerClient := fakeFlagger.NewSimpleClientset(canary)
+	kubeClient := fake.NewSimpleClientset(dep, hpa)
+	istioClient := fakeIstio.NewSimpleClientset()
+
+	logger, _ := logging.NewLogger("debug")
+
+	router := &CanaryRouter{
+		flaggerClient: flaggerClient,
+		kubeClient:    kubeClient,
+		istioClient:   istioClient,
+		logger:        logger,
+	}
+
+	err := router.Sync(canary)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	canarySvc, err := kubeClient.CoreV1().Services("default").Get("podinfo", metav1.GetOptions{})
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	if canarySvc.Spec.Ports[0].Name != "http" {
+		t.Errorf("Got svc port name %s wanted %s", canarySvc.Spec.Ports[0].Name, "http")
+	}
+
+	if canarySvc.Spec.Ports[0].Port != 9898 {
+		t.Errorf("Got svc port %v wanted %v", canarySvc.Spec.Ports[0].Port, 9898)
+	}
+
+	primarySvc, err := kubeClient.CoreV1().Services("default").Get("podinfo-primary", metav1.GetOptions{})
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	if primarySvc.Spec.Ports[0].Name != "http" {
+		t.Errorf("Got primary svc port name %s wanted %s", primarySvc.Spec.Ports[0].Name, "http")
+	}
+
+	if primarySvc.Spec.Ports[0].Port != 9898 {
+		t.Errorf("Got primary svc port %v wanted %v", primarySvc.Spec.Ports[0].Port, 9898)
+	}
+
+	vs, err := istioClient.NetworkingV1alpha3().VirtualServices("default").Get("podinfo", metav1.GetOptions{})
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	if len(vs.Spec.Http) != 1 {
+		t.Errorf("Got Istio VS Http %v wanted %v", len(vs.Spec.Http), 1)
+	}
+
+	if len(vs.Spec.Http[0].Route) != 2 {
+		t.Errorf("Got Istio VS routes %v wanted %v", len(vs.Spec.Http[0].Route), 2)
+	}
+}
+
+func TestCanaryRouter_GetRoutes(t *testing.T) {
+	canary := newTestCanary()
+	dep := newTestDeployment()
+	hpa := newTestHPA()
+
+	flaggerClient := fakeFlagger.NewSimpleClientset(canary)
+	kubeClient := fake.NewSimpleClientset(dep, hpa)
+	istioClient := fakeIstio.NewSimpleClientset()
+
+	logger, _ := logging.NewLogger("debug")
+
+	router := &CanaryRouter{
+		flaggerClient: flaggerClient,
+		kubeClient:    kubeClient,
+		istioClient:   istioClient,
+		logger:        logger,
+	}
+
+	err := router.Sync(canary)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	p, c, err := router.GetRoutes(canary)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	if p.Weight != 100 {
+		t.Errorf("Got primary weight %v wanted %v", p.Weight, 100)
+	}
+
+	if c.Weight != 0 {
+		t.Errorf("Got canary weight %v wanted %v", c.Weight, 0)
+	}
+}
+
+func TestCanaryRouter_SetRoutes(t *testing.T) {
+	canary := newTestCanary()
+	dep := newTestDeployment()
+	hpa := newTestHPA()
+
+	flaggerClient := fakeFlagger.NewSimpleClientset(canary)
+	kubeClient := fake.NewSimpleClientset(dep, hpa)
+	istioClient := fakeIstio.NewSimpleClientset()
+
+	logger, _ := logging.NewLogger("debug")
+
+	router := &CanaryRouter{
+		flaggerClient: flaggerClient,
+		kubeClient:    kubeClient,
+		istioClient:   istioClient,
+		logger:        logger,
+	}
+
+	err := router.Sync(canary)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	p, c, err := router.GetRoutes(canary)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	p.Weight = 50
+	c.Weight = 50
+
+	err = router.SetRoutes(canary, p, c)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	vs, err := istioClient.NetworkingV1alpha3().VirtualServices("default").Get("podinfo", metav1.GetOptions{})
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	pRoute := istiov1alpha3.DestinationWeight{}
+	cRoute := istiov1alpha3.DestinationWeight{}
+
+	for _, http := range vs.Spec.Http {
+		for _, route := range http.Route {
+			if route.Destination.Host == fmt.Sprintf("%s-primary", canary.Spec.TargetRef.Name) {
+				pRoute = route
+			}
+			if route.Destination.Host == canary.Spec.TargetRef.Name {
+				cRoute = route
+			}
+		}
+	}
+
+	if pRoute.Weight != p.Weight {
+		t.Errorf("Got primary weight %v wanted %v", pRoute.Weight, c.Weight)
+	}
+
+	if cRoute.Weight != c.Weight {
+		t.Errorf("Got canary weight %v wanted %v", cRoute.Weight, c.Weight)
+	}
+}