🌱 Fix CRS e2e helper with multiple bindings (kubernetes-sigs#10191)

* test(e2e): Fix CRS helper with multiple bindings

Check the relevant ResourceSetBinding to see if the resource is applied. If multiple ClusterResourceSets match a cluster, the
ClusterResourceSetBinding will have multiple bindings and so only the
relevant ResourceSetBinding should be checked.

* fixup! refactor: Apply review suggestions

* fixup! test: Add test for CRS e2e helper

test/framework/clusterresourceset_helpers.go

@@ -150,10 +150,27 @@ func WaitForClusterResourceSetToApplyResources(ctx context.Context, input WaitFo
 				continue
 			}
 
-			if len(binding.Spec.Bindings) == 0 || !binding.Spec.Bindings[0].IsApplied(resource) {
+			// Check relevant ResourceSetBinding to see if the resource is applied. If no ResourceSetBinding is found for
+			// the specified ClusterResourceSet, the resource has not applied.
+			resourceSetBinding := getResourceSetBindingForClusterResourceSet(binding, input.ClusterResourceSet)
+			if resourceSetBinding == nil || !resourceSetBinding.IsApplied(resource) {
 				return false
 			}
 		}
 		return true
 	}, intervals...).Should(BeTrue())
 }
+
+func getResourceSetBindingForClusterResourceSet(
+	clusterResourceSetBinding *addonsv1.ClusterResourceSetBinding, clusterResourceSet *addonsv1.ClusterResourceSet,
+) *addonsv1.ResourceSetBinding {
+	if clusterResourceSetBinding == nil || clusterResourceSet == nil {
+		return nil
+	}
+	for _, binding := range clusterResourceSetBinding.Spec.Bindings {
+		if binding.ClusterResourceSetName == clusterResourceSet.Name {
+			return binding
+		}
+	}
+	return nil
+}

test/framework/clusterresourceset_helpers_test.go

@@ -0,0 +1,135 @@
+/*
+Copyright 2020 The Kubernetes 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 framework
+
+import (
+	"testing"
+
+	. "github.com/onsi/gomega"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	addonsv1 "sigs.k8s.io/cluster-api/exp/addons/api/v1beta1"
+)
+
+func Test_getResourceSetBindingForClusterResourceSet(t *testing.T) {
+	tests := []struct {
+		name      string
+		inputCRSB *addonsv1.ClusterResourceSetBinding
+		inputCRS  *addonsv1.ClusterResourceSet
+		want      *addonsv1.ResourceSetBinding
+	}{{
+		name: "nil inputs",
+		want: nil,
+	}, {
+		name:      "nil CRS",
+		inputCRSB: &addonsv1.ClusterResourceSetBinding{},
+		want:      nil,
+	}, {
+		name:     "nil CRSB",
+		inputCRS: &addonsv1.ClusterResourceSet{},
+		want:     nil,
+	}, {
+		name:      "CRSB with no bindings",
+		inputCRSB: &addonsv1.ClusterResourceSetBinding{},
+		inputCRS:  &addonsv1.ClusterResourceSet{},
+		want:      nil,
+	}, {
+		name: "CRSB with no matching bindings",
+		inputCRSB: &addonsv1.ClusterResourceSetBinding{
+			Spec: addonsv1.ClusterResourceSetBindingSpec{
+				Bindings: []*addonsv1.ResourceSetBinding{
+					{ClusterResourceSetName: "bar"},
+				},
+			},
+		},
+		inputCRS: &addonsv1.ClusterResourceSet{ObjectMeta: metav1.ObjectMeta{Name: "foo"}},
+		want:     nil,
+	}, {
+		name: "CRSB with single matching bindings",
+		inputCRSB: &addonsv1.ClusterResourceSetBinding{
+			Spec: addonsv1.ClusterResourceSetBindingSpec{
+				Bindings: []*addonsv1.ResourceSetBinding{
+					{ClusterResourceSetName: "foo"},
+				},
+			},
+		},
+		inputCRS: &addonsv1.ClusterResourceSet{ObjectMeta: metav1.ObjectMeta{Name: "foo"}},
+		want:     &addonsv1.ResourceSetBinding{ClusterResourceSetName: "foo"},
+	}, {
+		name: "CRSB with multiple bindings with match at index 0",
+		inputCRSB: &addonsv1.ClusterResourceSetBinding{
+			Spec: addonsv1.ClusterResourceSetBindingSpec{
+				Bindings: []*addonsv1.ResourceSetBinding{
+					{ClusterResourceSetName: "foo"},
+					{ClusterResourceSetName: "bar"},
+				},
+			},
+		},
+		inputCRS: &addonsv1.ClusterResourceSet{ObjectMeta: metav1.ObjectMeta{Name: "foo"}},
+		want:     &addonsv1.ResourceSetBinding{ClusterResourceSetName: "foo"},
+	}, {
+		name: "CRSB with multiple bindings with match at index 1",
+		inputCRSB: &addonsv1.ClusterResourceSetBinding{
+			Spec: addonsv1.ClusterResourceSetBindingSpec{
+				Bindings: []*addonsv1.ResourceSetBinding{
+					{ClusterResourceSetName: "bar"},
+					{ClusterResourceSetName: "foo"},
+				},
+			},
+		},
+		inputCRS: &addonsv1.ClusterResourceSet{ObjectMeta: metav1.ObjectMeta{Name: "foo"}},
+		want:     &addonsv1.ResourceSetBinding{ClusterResourceSetName: "foo"},
+	}, {
+		name: "CRSB with multiple bindings with match at middle index",
+		inputCRSB: &addonsv1.ClusterResourceSetBinding{
+			Spec: addonsv1.ClusterResourceSetBindingSpec{
+				Bindings: []*addonsv1.ResourceSetBinding{
+					{ClusterResourceSetName: "bar"},
+					{ClusterResourceSetName: "foo"},
+					{ClusterResourceSetName: "baz"},
+				},
+			},
+		},
+		inputCRS: &addonsv1.ClusterResourceSet{ObjectMeta: metav1.ObjectMeta{Name: "foo"}},
+		want:     &addonsv1.ResourceSetBinding{ClusterResourceSetName: "foo"},
+	}, {
+		name: "CRSB with multiple bindings with match at last index",
+		inputCRSB: &addonsv1.ClusterResourceSetBinding{
+			Spec: addonsv1.ClusterResourceSetBindingSpec{
+				Bindings: []*addonsv1.ResourceSetBinding{
+					{ClusterResourceSetName: "bar"},
+					{ClusterResourceSetName: "baz"},
+					{ClusterResourceSetName: "foo"},
+				},
+			},
+		},
+		inputCRS: &addonsv1.ClusterResourceSet{ObjectMeta: metav1.ObjectMeta{Name: "foo"}},
+		want:     &addonsv1.ResourceSetBinding{ClusterResourceSetName: "foo"},
+	}}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			g := NewWithT(t)
+
+			g.Expect(
+				getResourceSetBindingForClusterResourceSet(
+					tt.inputCRSB,
+					tt.inputCRS,
+				),
+			).To(Equal(tt.want))
+		})
+	}
+}