sort rulegroups o iterate the map in a sorted order (#186)

* sort rulegroups o iterate the map in a sorted order

* Update converter_test.go

pkg/i2gw/providers/common/converter.go

@@ -17,7 +17,9 @@ limitations under the License.
 package common
 
 import (
+	"cmp"
 	"fmt"
+	"slices"
 	"strings"
 
 	"github.com/kubernetes-sigs/ingress2gateway/pkg/i2gw"
@@ -171,7 +173,18 @@ func (a *ingressAggregator) toHTTPRoutesAndGateways(options i2gw.ProviderImpleme
 	var errors field.ErrorList
 	listenersByNamespacedGateway := map[string][]gatewayv1.Listener{}
 
-	for _, rg := range a.ruleGroups {
+	// Sort the rulegroups to iterate the map in a sorted order.
+	ruleGroupsKeys := make([]ruleGroupKey, 0, len(a.ruleGroups))
+	for k := range a.ruleGroups {
+		ruleGroupsKeys = append(ruleGroupsKeys, k)
+	}
+
+	slices.SortFunc(ruleGroupsKeys, func(a, b ruleGroupKey) int {
+		return cmp.Compare(a, b)
+	})
+
+	for _, rgk := range ruleGroupsKeys {
+		rg := a.ruleGroups[rgk]
 		listener := gatewayv1.Listener{}
 		if rg.host != "" {
 			listener.Hostname = (*gatewayv1.Hostname)(&rg.host)

pkg/i2gw/providers/ingressnginx/converter_test.go

@@ -292,33 +292,33 @@ func Test_ToGateway(t *testing.T) {
 							GatewayClassName: "nginx",
 							Listeners: []gatewayv1.Listener{
 								{
-									Name:     "foo-example-com-http",
+									Name:     "bar-example-com-http",
 									Port:     80,
 									Protocol: gatewayv1.HTTPProtocolType,
-									Hostname: ptrTo(gatewayv1.Hostname("foo.example.com")),
+									Hostname: ptrTo(gatewayv1.Hostname("bar.example.com")),
 								},
 								{
-									Name:     "foo-example-com-https",
+									Name:     "bar-example-com-https",
 									Port:     443,
 									Protocol: gatewayv1.HTTPSProtocolType,
-									Hostname: ptrTo(gatewayv1.Hostname("foo.example.com")),
+									Hostname: ptrTo(gatewayv1.Hostname("bar.example.com")),
 									TLS: &gatewayv1.GatewayTLSConfig{
 										CertificateRefs: []gatewayv1.SecretObjectReference{
 											{Name: "example-com"},
 										},
 									},
 								},
 								{
-									Name:     "bar-example-com-http",
+									Name:     "foo-example-com-http",
 									Port:     80,
 									Protocol: gatewayv1.HTTPProtocolType,
-									Hostname: ptrTo(gatewayv1.Hostname("bar.example.com")),
+									Hostname: ptrTo(gatewayv1.Hostname("foo.example.com")),
 								},
 								{
-									Name:     "bar-example-com-https",
+									Name:     "foo-example-com-https",
 									Port:     443,
 									Protocol: gatewayv1.HTTPSProtocolType,
-									Hostname: ptrTo(gatewayv1.Hostname("bar.example.com")),
+									Hostname: ptrTo(gatewayv1.Hostname("foo.example.com")),
 									TLS: &gatewayv1.GatewayTLSConfig{
 										CertificateRefs: []gatewayv1.SecretObjectReference{
 											{Name: "example-com"},
@@ -520,16 +520,16 @@ func Test_ToGateway(t *testing.T) {
 							GatewayClassName: "nginx",
 							Listeners: []gatewayv1.Listener{
 								{
-									Name:     "foo-example-com-http",
+									Name:     "bar-example-com-http",
 									Port:     80,
 									Protocol: gatewayv1.HTTPProtocolType,
-									Hostname: ptrTo(gatewayv1.Hostname("foo.example.com")),
+									Hostname: ptrTo(gatewayv1.Hostname("bar.example.com")),
 								},
 								{
-									Name:     "bar-example-com-http",
+									Name:     "foo-example-com-http",
 									Port:     80,
 									Protocol: gatewayv1.HTTPProtocolType,
-									Hostname: ptrTo(gatewayv1.Hostname("bar.example.com")),
+									Hostname: ptrTo(gatewayv1.Hostname("foo.example.com")),
 								},
 							},
 						},