test: add unit tests for pkg/resolution/resource

fix #6429

pkg/resolution/common/interface.go

@@ -0,0 +1,63 @@
+/*
+Copyright 2023 The Tekton 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 common
+
+import (
+	"context"
+
+	pipelinev1beta1 "github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// ResolverName is the type used for a resolver's name and is mostly
+// used to ensure the function signatures that accept it are clear on the
+// purpose for the given string.
+type ResolverName string
+
+// Requester is the interface implemented by a type that knows how to
+// submit requests for remote resources.
+type Requester interface {
+	// Submit accepts the name of a resolver to submit a request to
+	// along with the request itself.
+	Submit(context.Context, ResolverName, Request) (ResolvedResource, error)
+}
+
+// Request is implemented by any type that represents a single request
+// for a remote resource. Implementing this interface gives the underlying
+// type an opportunity to control properties such as whether the name of
+// a request has particular properties, whether the request should be made
+// to a specific namespace, and precisely which parameters should be included.
+type Request interface {
+	Name() string
+	Namespace() string
+	Params() pipelinev1beta1.Params
+}
+
+// OwnedRequest is implemented by any type implementing Request that also needs
+// to express a Kubernetes OwnerRef relationship as part of the request being
+// made.
+type OwnedRequest interface {
+	OwnerRef() metav1.OwnerReference
+}
+
+// ResolvedResource is implemented by any type that offers a read-only
+// view of the data and metadata of a resolved remote resource.
+type ResolvedResource interface {
+	Data() ([]byte, error)
+	Annotations() map[string]string
+	RefSource() *pipelinev1beta1.RefSource
+}

pkg/resolution/resource/crd_resource.go

@@ -122,7 +122,13 @@ func appendOwnerReference(rr *v1beta1.ResolutionRequest, req Request) {
 }
 
 func ownerRefsAreEqual(a, b metav1.OwnerReference) bool {
-	return a.APIVersion == b.APIVersion && a.Kind == b.Kind && a.Name == b.Name && a.UID == b.UID && a.Controller == b.Controller
+	// pointers values cannot be directly compared.
+	if (a.Controller == nil && b.Controller != nil) ||
+		(a.Controller != nil && b.Controller == nil) ||
+		(*a.Controller != *b.Controller) {
+		return false
+	}
+	return a.APIVersion == b.APIVersion && a.Kind == b.Kind && a.Name == b.Name && a.UID == b.UID
 }
 
 // readOnlyResolutionRequest is an opaque wrapper around ResolutionRequest