Repository: kubernetes-csi/external-snapshotter
Pull request #334 (2020-07-21 16:26:32)

chore: get rid of k8s.io/kubernetes dep
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**What type of PR is this?**
> Uncomment only one ` /kind <>` line, hit enter to put that in a new line, and remove leading whitespaces from that line:
>
> /kind api-change
> /kind bug

/kind cleanup
> /kind design
> /kind documentation
> /kind failing-test
> /kind feature
> /kind flake

**What this PR does / why we need it**:

The k8s.io/kubernetes dependency is problematic because of the many replaces it brings with it. This makes it hard to import external-snapshotter in 3rd party projects without having a lot of `replace` directives in those projects as well.

The only usage of that import was to get two very simple utility functions so I copied them over to this repo.

**Which issue(s) this PR fixes**:
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no issue

**Special notes for your reviewer**:

**Does this PR introduce a user-facing change?**:
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Patch:
diff --git a/go.mod b/go.mod
index a59c2150d..33696ee51 100644
--- a/go.mod
+++ b/go.mod
@@ -20,7 +20,6 @@ require (
 	k8s.io/code-generator v0.18.0
 	k8s.io/component-base v0.18.0
 	k8s.io/klog v1.0.0
-	k8s.io/kubernetes v1.18.0
 )
 
 replace k8s.io/api => k8s.io/api v0.18.0
diff --git a/go.sum b/go.sum
index f7e885a83..a702424ce 100644
--- a/go.sum
+++ b/go.sum
@@ -1,113 +1,40 @@
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@@ -116,111 +43,43 @@ github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymF
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@@ -231,43 +90,18 @@ github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
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@@ -276,59 +110,27 @@ github.com/googleapis/gnostic v0.1.0/go.mod h1:sJBsCZ4ayReDTBIg8b9dl28c5xFWyhBTV
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@@ -336,97 +138,37 @@ github.com/kubernetes-csi/csi-lib-utils v0.7.0 h1:t1cS7HTD7z5D7h9iAdjWuHtMxJPb9s
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@@ -441,52 +183,11 @@ github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y8
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@@ -495,93 +196,31 @@ github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0
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@@ -689,114 +281,60 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA
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 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.2/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 k8s.io/api v0.18.0 h1:lwYk8Vt7rsVTwjRU6pzEsa9YNhThbmbocQlKvNBB4EQ=
 k8s.io/api v0.18.0/go.mod h1:q2HRQkfDzHMBZL9l/y9rH63PkQl4vae0xRT+8prbrK8=
-k8s.io/apiextensions-apiserver v0.18.0/go.mod h1:18Cwn1Xws4xnWQNC00FLq1E350b9lUF+aOdIWDOZxgo=
 k8s.io/apimachinery v0.18.0 h1:fuPfYpk3cs1Okp/515pAf0dNhL66+8zk8RLbSX+EgAE=
 k8s.io/apimachinery v0.18.0/go.mod h1:9SnR/e11v5IbyPCGbvJViimtJ0SwHG4nfZFjU77ftcA=
-k8s.io/apiserver v0.18.0/go.mod h1:3S2O6FeBBd6XTo0njUrLxiqk8GNy6wWOftjhJcXYnjw=
-k8s.io/cli-runtime v0.18.0/go.mod h1:1eXfmBsIJosjn9LjEBUd2WVPoPAY9XGTqTFcPMIBsUQ=
 k8s.io/client-go v0.18.0 h1:yqKw4cTUQraZK3fcVCMeSa+lqKwcjZ5wtcOIPnxQno4=
 k8s.io/client-go v0.18.0/go.mod h1:uQSYDYs4WhVZ9i6AIoEZuwUggLVEF64HOD37boKAtF8=
-k8s.io/cloud-provider v0.18.0/go.mod h1:ZBq1FhoJ+XoQ8JYBYoyx81LS3JV0RAW/UmHf/6w9E6k=
-k8s.io/cluster-bootstrap v0.18.0/go.mod h1:xSe+bOZ3asS/ciT91ESQYGhjOql43aBETfvbCzNvad8=
 k8s.io/code-generator v0.18.0 h1:0xIRWzym+qMgVpGmLESDeMfz/orwgxwxFFAo1xfGNtQ=
 k8s.io/code-generator v0.18.0/go.mod h1:+UHX5rSbxmR8kzS+FAv7um6dtYrZokQvjHpDSYRVkTc=
 k8s.io/component-base v0.18.0 h1:I+lP0fNfsEdTDpHaL61bCAqTZLoiWjEEP304Mo5ZQgE=
 k8s.io/component-base v0.18.0/go.mod h1:u3BCg0z1uskkzrnAKFzulmYaEpZF7XC9Pf/uFyb1v2c=
-k8s.io/cri-api v0.18.0/go.mod h1:OJtpjDvfsKoLGhvcc0qfygved0S0dGX56IJzPbqTG1s=
-k8s.io/csi-translation-lib v0.18.0/go.mod h1:iF8TE4ACSaPqN1qxmiIjvcU1A8VgkOrpcFGD7Z0hVu0=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/gengo v0.0.0-20200114144118-36b2048a9120 h1:RPscN6KhmG54S33L+lr3GS+oD1jmchIU0ll519K6FA4=
 k8s.io/gengo v0.0.0-20200114144118-36b2048a9120/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
-k8s.io/heapster v1.2.0-beta.1/go.mod h1:h1uhptVXMwC8xtZBYsPXKVi8fpdlYkTs6k949KozGrM=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
 k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
-k8s.io/kube-aggregator v0.18.0/go.mod h1:ateewQ5QbjMZF/dihEFXwaEwoA4v/mayRvzfmvb6eqI=
-k8s.io/kube-controller-manager v0.18.0/go.mod h1:pIRGUrSo+skWzwr5pgWNbgiFWEGSotbamGQpR/gKd5U=
 k8s.io/kube-openapi v0.0.0-20200121204235-bf4fb3bd569c h1:/KUFqjjqAcY4Us6luF5RDNZ16KJtb49HfR3ZHB9qYXM=
 k8s.io/kube-openapi v0.0.0-20200121204235-bf4fb3bd569c/go.mod h1:GRQhZsXIAJ1xR0C9bd8UpWHZ5plfAS9fzPjJuQ6JL3E=
-k8s.io/kube-proxy v0.18.0/go.mod h1:st3Gcg9wYAd1sn6UMeAs5AHN3R0NOItfB5P6qObKrr8=
-k8s.io/kube-scheduler v0.18.0/go.mod h1:GFaNT5Z5/zPZsjXmkGihac2qsT+0u2KIHDgXdFfPHPc=
-k8s.io/kubectl v0.18.0/go.mod h1:LOkWx9Z5DXMEg5KtOjHhRiC1fqJPLyCr3KtQgEolCkU=
-k8s.io/kubelet v0.18.0/go.mod h1:1VULM2m7c/ePlIeNOVVK+kkprayDr1RPf1T8oaNaHuQ=
-k8s.io/kubernetes v1.18.0 h1:rVe+edi5GwutPQJ4KIZq1Nk506nmnfyz/KOZVCLv7Yo=
-k8s.io/kubernetes v1.18.0/go.mod h1:z8xjOOO1Ljz+TaHpOxVGC7cxtF32TesIamoQ+BZrVS0=
-k8s.io/legacy-cloud-providers v0.18.0/go.mod h1:4Bc9CdZg8wl0mskyhnaXa8DdqLpTUfPEMkw3FZok+H8=
-k8s.io/metrics v0.18.0/go.mod h1:8aYTW18koXqjLVKL7Ds05RPMX9ipJZI3mywYvBOxXd4=
-k8s.io/repo-infra v0.0.1-alpha.1/go.mod h1:wO1t9WaB99V80ljbeENTnayuEEwNZt7gECYh/CEyOJ8=
-k8s.io/sample-apiserver v0.18.0/go.mod h1:1RKw7QEixom4PIw/vjUvDgl2QQbuTXbeCUHLlNCzOjg=
-k8s.io/system-validators v1.0.4/go.mod h1:HgSgTg4NAGNoYYjKsUyk52gdNi2PVDswQ9Iyn66R7NI=
 k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89 h1:d4vVOjXm687F1iLSP2q3lyPPuyvTUt3aVoBpi2DqRsU=
 k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
-modernc.org/cc v1.0.0/go.mod h1:1Sk4//wdnYJiUIxnW8ddKpaOJCF37yAdqYnkxUpaYxw=
-modernc.org/golex v1.0.0/go.mod h1:b/QX9oBD/LhixY6NDh+IdGv17hgB+51fET1i2kPSmvk=
-modernc.org/mathutil v1.0.0/go.mod h1:wU0vUrJsVWBZ4P6e7xtFJEhFSNsfRLJ8H458uRjg03k=
-modernc.org/strutil v1.0.0/go.mod h1:lstksw84oURvj9y3tn8lGvRxyRC1S2+g5uuIzNfIOBs=
-modernc.org/xc v1.0.0/go.mod h1:mRNCo0bvLjGhHO9WsyuKVU4q0ceiDDDoEeWDJHrNx8I=
-mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
-mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
-mvdan.cc/unparam v0.0.0-20190209190245-fbb59629db34/go.mod h1:H6SUd1XjIs+qQCyskXg5OFSrilMRUkD8ePJpHKDPaeY=
-rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
 rsc.io/quote/v3 v3.1.0 h1:9JKUTTIUgS6kzR9mK1YuGKv6Nl+DijDNIc0ghT58FaY=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0 h1:7uVkIFmeBqHfdjD+gZwtXXI+RODJ2Wc4O7MPEh/QiW4=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
-sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.7/go.mod h1:PHgbrJT7lCHcxMU+mDHEm+nx46H4zuuHZkDP6icnhu0=
-sigs.k8s.io/kustomize v2.0.3+incompatible/go.mod h1:MkjgH3RdOWrievjo6c9T245dYlB5QeXV4WCbnt/PEpU=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0-20200116222232-67a7b8c61874/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0 h1:dOmIZBMfhcHS09XZkMyUgkq5trg3/jRyJYFZUiaOp8E=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
@@ -804,5 +342,3 @@ sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
-sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=
-vbom.ml/util v0.0.0-20160121211510-db5cfe13f5cc/go.mod h1:so/NYdZXCz+E3ZpW0uAoCj6uzU2+8OWDFv/HxUSs7kI=
diff --git a/pkg/common-controller/snapshot_controller.go b/pkg/common-controller/snapshot_controller.go
index bbbc4bc23..e5fab0068 100644
--- a/pkg/common-controller/snapshot_controller.go
+++ b/pkg/common-controller/snapshot_controller.go
@@ -31,7 +31,6 @@ import (
 	"k8s.io/client-go/kubernetes/scheme"
 	ref "k8s.io/client-go/tools/reference"
 	"k8s.io/klog"
-	"k8s.io/kubernetes/pkg/util/slice"
 
 	crdv1 "github.com/kubernetes-csi/external-snapshotter/v2/pkg/apis/volumesnapshot/v1beta1"
 	"github.com/kubernetes-csi/external-snapshotter/v2/pkg/utils"
@@ -223,7 +222,7 @@ func (ctrl *csiSnapshotCommonController) isPVCwithFinalizerInUseByCurrentSnapsho
 	}
 
 	// Check if there is a Finalizer on PVC. If not, return false
-	if !slice.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer, nil) {
+	if !utils.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer) {
 		return false
 	}
 
@@ -821,7 +820,7 @@ func (ctrl *csiSnapshotCommonController) ensurePVCFinalizer(snapshot *crdv1.Volu
 	}
 
 	// If PVC is not being deleted and PVCFinalizer is not added yet, the PVCFinalizer should be added.
-	if pvc.ObjectMeta.DeletionTimestamp == nil && !slice.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer, nil) {
+	if pvc.ObjectMeta.DeletionTimestamp == nil && !utils.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer) {
 		// Add the finalizer
 		pvcClone := pvc.DeepCopy()
 		pvcClone.ObjectMeta.Finalizers = append(pvcClone.ObjectMeta.Finalizers, utils.PVCFinalizer)
@@ -842,7 +841,7 @@ func (ctrl *csiSnapshotCommonController) removePVCFinalizer(pvc *v1.PersistentVo
 	// TODO(xyang): We get PVC from informer but it may be outdated
 	// Should get it from API server directly before removing finalizer
 	pvcClone := pvc.DeepCopy()
-	pvcClone.ObjectMeta.Finalizers = slice.RemoveString(pvcClone.ObjectMeta.Finalizers, utils.PVCFinalizer, nil)
+	pvcClone.ObjectMeta.Finalizers = utils.RemoveString(pvcClone.ObjectMeta.Finalizers, utils.PVCFinalizer)
 
 	_, err := ctrl.client.CoreV1().PersistentVolumeClaims(pvcClone.Namespace).Update(context.TODO(), pvcClone, metav1.UpdateOptions{})
 	if err != nil {
@@ -898,7 +897,7 @@ func (ctrl *csiSnapshotCommonController) checkandRemovePVCFinalizer(snapshot *cr
 	klog.V(5).Infof("checkandRemovePVCFinalizer for snapshot [%s]: snapshot status [%#v]", snapshot.Name, snapshot.Status)
 
 	// Check if there is a Finalizer on PVC to be removed
-	if slice.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer, nil) {
+	if utils.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer) {
 		// There is a Finalizer on PVC. Check if PVC is used
 		// and remove finalizer if it's not used.
 		inUse := ctrl.isPVCBeingUsed(pvc, snapshot)
@@ -1031,10 +1030,6 @@ func (ctrl *csiSnapshotCommonController) updateSnapshotStatus(snapshot *crdv1.Vo
 	if content.Status != nil && content.Status.ReadyToUse != nil {
 		readyToUse = *content.Status.ReadyToUse
 	}
-	var volumeSnapshotErr *crdv1.VolumeSnapshotError
-	if content.Status != nil && content.Status.Error != nil {
-		volumeSnapshotErr = content.Status.Error.DeepCopy()
-	}
 
 	klog.V(5).Infof("updateSnapshotStatus: updating VolumeSnapshot [%+v] based on VolumeSnapshotContentStatus [%+v]", snapshot, content.Status)
 
@@ -1056,9 +1051,6 @@ func (ctrl *csiSnapshotCommonController) updateSnapshotStatus(snapshot *crdv1.Vo
 		if size != nil {
 			newStatus.RestoreSize = resource.NewQuantity(*size, resource.BinarySI)
 		}
-		if volumeSnapshotErr != nil {
-			newStatus.Error = volumeSnapshotErr
-		}
 		updated = true
 	} else {
 		newStatus = snapshotObj.Status.DeepCopy()
@@ -1081,10 +1073,6 @@ func (ctrl *csiSnapshotCommonController) updateSnapshotStatus(snapshot *crdv1.Vo
 			newStatus.RestoreSize = resource.NewQuantity(*size, resource.BinarySI)
 			updated = true
 		}
-		if (newStatus.Error == nil && volumeSnapshotErr != nil) || (newStatus.Error != nil && volumeSnapshotErr != nil && newStatus.Error.Time != nil && volumeSnapshotErr.Time != nil && &newStatus.Error.Time != &volumeSnapshotErr.Time) || (newStatus.Error != nil && volumeSnapshotErr == nil) {
-			newStatus.Error = volumeSnapshotErr
-			updated = true
-		}
 	}
 
 	if updated {
@@ -1306,10 +1294,10 @@ func (ctrl *csiSnapshotCommonController) removeSnapshotFinalizer(snapshot *crdv1
 
 	snapshotClone := snapshot.DeepCopy()
 	if removeSourceFinalizer {
-		snapshotClone.ObjectMeta.Finalizers = slice.RemoveString(snapshotClone.ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer, nil)
+		snapshotClone.ObjectMeta.Finalizers = utils.RemoveString(snapshotClone.ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer)
 	}
 	if removeBoundFinalizer {
-		snapshotClone.ObjectMeta.Finalizers = slice.RemoveString(snapshotClone.ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer, nil)
+		snapshotClone.ObjectMeta.Finalizers = utils.RemoveString(snapshotClone.ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer)
 	}
 	_, err := ctrl.clientset.SnapshotV1beta1().VolumeSnapshots(snapshotClone.Namespace).Update(context.TODO(), snapshotClone, metav1.UpdateOptions{})
 	if err != nil {
diff --git a/pkg/sidecar-controller/snapshot_controller.go b/pkg/sidecar-controller/snapshot_controller.go
index d81555c88..36af723e3 100644
--- a/pkg/sidecar-controller/snapshot_controller.go
+++ b/pkg/sidecar-controller/snapshot_controller.go
@@ -30,7 +30,6 @@ import (
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/klog"
-	"k8s.io/kubernetes/pkg/util/slice"
 )
 
 // Design:
@@ -506,12 +505,12 @@ func (ctrl *csiSnapshotSideCarController) GetCredentialsFromAnnotation(content *
 // removeContentFinalizer removes the VolumeSnapshotContentFinalizer from a
 // content if there exists one.
 func (ctrl csiSnapshotSideCarController) removeContentFinalizer(content *crdv1.VolumeSnapshotContent) error {
-	if !slice.ContainsString(content.ObjectMeta.Finalizers, utils.VolumeSnapshotContentFinalizer, nil) {
+	if !utils.ContainsString(content.ObjectMeta.Finalizers, utils.VolumeSnapshotContentFinalizer) {
 		// the finalizer does not exit, return directly
 		return nil
 	}
 	contentClone := content.DeepCopy()
-	contentClone.ObjectMeta.Finalizers = slice.RemoveString(contentClone.ObjectMeta.Finalizers, utils.VolumeSnapshotContentFinalizer, nil)
+	contentClone.ObjectMeta.Finalizers = utils.RemoveString(contentClone.ObjectMeta.Finalizers, utils.VolumeSnapshotContentFinalizer)
 
 	_, err := ctrl.clientset.SnapshotV1beta1().VolumeSnapshotContents().Update(context.TODO(), contentClone, metav1.UpdateOptions{})
 	if err != nil {
diff --git a/pkg/utils/util.go b/pkg/utils/util.go
index 009a1d3b7..df1cdcf0b 100644
--- a/pkg/utils/util.go
+++ b/pkg/utils/util.go
@@ -33,7 +33,6 @@ import (
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/klog"
-	"k8s.io/kubernetes/pkg/util/slice"
 )
 
 var (
@@ -109,6 +108,34 @@ var SnapshotterListSecretParams = secretParamsMap{
 	secretNamespaceKey: PrefixedSnapshotterListSecretNamespaceKey,
 }
 
+// ContainsString checks if a given slice of strings contains the provided string.
+func ContainsString(slice []string, s string) bool {
+	for _, item := range slice {
+		if item == s {
+			return true
+		}
+	}
+	return false
+}
+
+// RemoveString returns a newly created []string that contains all items from slice that
+// are not equal to s.
+func RemoveString(slice []string, s string) []string {
+	newSlice := make([]string, 0)
+	for _, item := range slice {
+		if item == s {
+			continue
+		}
+		newSlice = append(newSlice, item)
+	}
+	if len(newSlice) == 0 {
+		// Sanitize for unit tests so we don't need to distinguish empty array
+		// and nil.
+		newSlice = nil
+	}
+	return newSlice
+}
+
 func SnapshotKey(vs *crdv1.VolumeSnapshot) string {
 	return fmt.Sprintf("%s/%s", vs.Namespace, vs.Name)
 }
@@ -337,23 +364,23 @@ func NoResyncPeriodFunc() time.Duration {
 
 // NeedToAddContentFinalizer checks if a Finalizer needs to be added for the volume snapshot content.
 func NeedToAddContentFinalizer(content *crdv1.VolumeSnapshotContent) bool {
-	return content.ObjectMeta.DeletionTimestamp == nil && !slice.ContainsString(content.ObjectMeta.Finalizers, VolumeSnapshotContentFinalizer, nil)
+	return content.ObjectMeta.DeletionTimestamp == nil && !ContainsString(content.ObjectMeta.Finalizers, VolumeSnapshotContentFinalizer)
 }
 
 // IsSnapshotDeletionCandidate checks if a volume snapshot deletionTimestamp
 // is set and any finalizer is on the snapshot.
 func IsSnapshotDeletionCandidate(snapshot *crdv1.VolumeSnapshot) bool {
-	return snapshot.ObjectMeta.DeletionTimestamp != nil && (slice.ContainsString(snapshot.ObjectMeta.Finalizers, VolumeSnapshotAsSourceFinalizer, nil) || slice.ContainsString(snapshot.ObjectMeta.Finalizers, VolumeSnapshotBoundFinalizer, nil))
+	return snapshot.ObjectMeta.DeletionTimestamp != nil && (ContainsString(snapshot.ObjectMeta.Finalizers, VolumeSnapshotAsSourceFinalizer) || ContainsString(snapshot.ObjectMeta.Finalizers, VolumeSnapshotBoundFinalizer))
 }
 
 // NeedToAddSnapshotAsSourceFinalizer checks if a Finalizer needs to be added for the volume snapshot as a source for PVC.
 func NeedToAddSnapshotAsSourceFinalizer(snapshot *crdv1.VolumeSnapshot) bool {
-	return snapshot.ObjectMeta.DeletionTimestamp == nil && !slice.ContainsString(snapshot.ObjectMeta.Finalizers, VolumeSnapshotAsSourceFinalizer, nil)
+	return snapshot.ObjectMeta.DeletionTimestamp == nil && !ContainsString(snapshot.ObjectMeta.Finalizers, VolumeSnapshotAsSourceFinalizer)
 }
 
 // NeedToAddSnapshotBoundFinalizer checks if a Finalizer needs to be added for the bound volume snapshot.
 func NeedToAddSnapshotBoundFinalizer(snapshot *crdv1.VolumeSnapshot) bool {
-	return snapshot.ObjectMeta.DeletionTimestamp == nil && !slice.ContainsString(snapshot.ObjectMeta.Finalizers, VolumeSnapshotBoundFinalizer, nil) && IsBoundVolumeSnapshotContentNameSet(snapshot)
+	return snapshot.ObjectMeta.DeletionTimestamp == nil && !ContainsString(snapshot.ObjectMeta.Finalizers, VolumeSnapshotBoundFinalizer) && IsBoundVolumeSnapshotContentNameSet(snapshot)
 }
 
 func deprecationWarning(deprecatedParam, newParam, removalVersion string) string {
diff --git a/vendor/k8s.io/kubernetes/LICENSE b/vendor/k8s.io/kubernetes/LICENSE
deleted file mode 100644
index d64569567..000000000
--- a/vendor/k8s.io/kubernetes/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
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diff --git a/vendor/k8s.io/kubernetes/pkg/util/slice/BUILD b/vendor/k8s.io/kubernetes/pkg/util/slice/BUILD
deleted file mode 100644
index 9b83415e5..000000000
--- a/vendor/k8s.io/kubernetes/pkg/util/slice/BUILD
+++ /dev/null
@@ -1,32 +0,0 @@
-package(default_visibility = ["//visibility:public"])
-
-load(
-    "@io_bazel_rules_go//go:def.bzl",
-    "go_library",
-    "go_test",
-)
-
-go_library(
-    name = "go_default_library",
-    srcs = ["slice.go"],
-    importpath = "k8s.io/kubernetes/pkg/util/slice",
-)
-
-go_test(
-    name = "go_default_test",
-    srcs = ["slice_test.go"],
-    embed = [":go_default_library"],
-)
-
-filegroup(
-    name = "package-srcs",
-    srcs = glob(["**"]),
-    tags = ["automanaged"],
-    visibility = ["//visibility:private"],
-)
-
-filegroup(
-    name = "all-srcs",
-    srcs = [":package-srcs"],
-    tags = ["automanaged"],
-)
diff --git a/vendor/k8s.io/kubernetes/pkg/util/slice/slice.go b/vendor/k8s.io/kubernetes/pkg/util/slice/slice.go
deleted file mode 100644
index 872fbdcad..000000000
--- a/vendor/k8s.io/kubernetes/pkg/util/slice/slice.go
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
-Copyright 2015 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 slice provides utility methods for common operations on slices.
-package slice
-
-import (
-	"sort"
-)
-
-// CopyStrings copies the contents of the specified string slice
-// into a new slice.
-func CopyStrings(s []string) []string {
-	if s == nil {
-		return nil
-	}
-	c := make([]string, len(s))
-	copy(c, s)
-	return c
-}
-
-// SortStrings sorts the specified string slice in place. It returns the same
-// slice that was provided in order to facilitate method chaining.
-func SortStrings(s []string) []string {
-	sort.Strings(s)
-	return s
-}
-
-// ContainsString checks if a given slice of strings contains the provided string.
-// If a modifier func is provided, it is called with the slice item before the comparation.
-func ContainsString(slice []string, s string, modifier func(s string) string) bool {
-	for _, item := range slice {
-		if item == s {
-			return true
-		}
-		if modifier != nil && modifier(item) == s {
-			return true
-		}
-	}
-	return false
-}
-
-// RemoveString returns a newly created []string that contains all items from slice that
-// are not equal to s and modifier(s) in case modifier func is provided.
-func RemoveString(slice []string, s string, modifier func(s string) string) []string {
-	newSlice := make([]string, 0)
-	for _, item := range slice {
-		if item == s {
-			continue
-		}
-		if modifier != nil && modifier(item) == s {
-			continue
-		}
-		newSlice = append(newSlice, item)
-	}
-	if len(newSlice) == 0 {
-		// Sanitize for unit tests so we don't need to distinguish empty array
-		// and nil.
-		newSlice = nil
-	}
-	return newSlice
-}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 4426cac82..16bf1504b 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -534,8 +534,6 @@ k8s.io/kube-openapi/pkg/generators
 k8s.io/kube-openapi/pkg/generators/rules
 k8s.io/kube-openapi/pkg/util/proto
 k8s.io/kube-openapi/pkg/util/sets
-# k8s.io/kubernetes v1.18.0
-k8s.io/kubernetes/pkg/util/slice
 # k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89
 k8s.io/utils/buffer
 k8s.io/utils/integer


Test patch:
diff --git a/pkg/common-controller/framework_test.go b/pkg/common-controller/framework_test.go
index 254092aa6..f00049649 100644
--- a/pkg/common-controller/framework_test.go
+++ b/pkg/common-controller/framework_test.go
@@ -53,7 +53,6 @@ import (
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/record"
 	"k8s.io/klog"
-	"k8s.io/kubernetes/pkg/util/slice"
 )
 
 // This is a unit test framework for snapshot controller.
@@ -453,7 +452,7 @@ func (r *snapshotReactor) checkSnapshots(expectedSnapshots []*crdv1.VolumeSnapsh
 		// Don't modify the existing object
 		c = c.DeepCopy()
 		c.ResourceVersion = ""
-		if c.Status != nil && c.Status.Error != nil {
+		if c.Status.Error != nil {
 			c.Status.Error.Time = &metav1.Time{}
 		}
 		expectedMap[c.Name] = c
@@ -463,7 +462,7 @@ func (r *snapshotReactor) checkSnapshots(expectedSnapshots []*crdv1.VolumeSnapsh
 		// written by the controller without any locks on it.
 		c = c.DeepCopy()
 		c.ResourceVersion = ""
-		if c.Status != nil && c.Status.Error != nil {
+		if c.Status.Error != nil {
 			c.Status.Error.Time = &metav1.Time{}
 		}
 		gotMap[c.Name] = c
@@ -872,18 +871,6 @@ func newContentWithUnmatchDriverArray(contentName, boundToSnapshotUID, boundToSn
 	}
 }
 
-func newContentArrayWithError(contentName, boundToSnapshotUID, boundToSnapshotName, snapshotHandle, snapshotClassName, desiredSnapshotHandle, volumeHandle string,
-	deletionPolicy crdv1.DeletionPolicy, size, creationTime *int64,
-	withFinalizer bool, snapshotErr *crdv1.VolumeSnapshotError) []*crdv1.VolumeSnapshotContent {
-	content := newContent(contentName, boundToSnapshotUID, boundToSnapshotName, snapshotHandle, snapshotClassName, desiredSnapshotHandle, volumeHandle, deletionPolicy, size, creationTime, withFinalizer, true)
-	ready := false
-	content.Status.ReadyToUse = &ready
-	content.Status.Error = snapshotErr
-	return []*crdv1.VolumeSnapshotContent{
-		content,
-	}
-}
-
 func newSnapshot(
 	snapshotName, snapshotUID, pvcName, targetContentName, snapshotClassName, boundContentName string,
 	readyToUse *bool, creationTime *metav1.Time, restoreSize *resource.Quantity,
@@ -1088,30 +1075,6 @@ func testSyncSnapshotError(ctrl *csiSnapshotCommonController, reactor *snapshotR
 	return fmt.Errorf("syncSnapshot succeeded when failure was expected")
 }
 
-func testUpdateSnapshotErrorStatus(ctrl *csiSnapshotCommonController, reactor *snapshotReactor, test controllerTest) error {
-	snapshot, err := ctrl.updateSnapshotStatus(test.initialSnapshots[0], test.initialContents[0])
-	if err != nil {
-		return fmt.Errorf("update snapshot status failed: %v", err)
-	}
-	var expected, got *crdv1.VolumeSnapshotError
-	if test.initialContents[0].Status != nil {
-		expected = test.initialContents[0].Status.Error
-	}
-	if snapshot.Status != nil {
-		got = snapshot.Status.Error
-	}
-	if expected == nil && got != nil {
-		return fmt.Errorf("update snapshot status failed: expected nil but got: %v", got)
-	}
-	if expected != nil && got == nil {
-		return fmt.Errorf("update snapshot status failed: expected: %v but got nil", expected)
-	}
-	if expected != nil && got != nil && !reflect.DeepEqual(expected, got) {
-		return fmt.Errorf("update snapshot status failed [A-expected, B-got]: %s", diff.ObjectDiff(expected, got))
-	}
-	return nil
-}
-
 func testSyncContent(ctrl *csiSnapshotCommonController, reactor *snapshotReactor, test controllerTest) error {
 	return ctrl.syncContent(test.initialContents[0])
 }
@@ -1357,7 +1320,7 @@ func evaluateFinalizerTests(ctrl *csiSnapshotCommonController, reactor *snapshot
 		if funcName == "testAddPVCFinalizer" {
 			for _, pvc := range reactor.claims {
 				if test.initialClaims[0].Name == pvc.Name {
-					if !slice.ContainsString(test.initialClaims[0].ObjectMeta.Finalizers, utils.PVCFinalizer, nil) && slice.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer, nil) {
+					if !utils.ContainsString(test.initialClaims[0].ObjectMeta.Finalizers, utils.PVCFinalizer) && utils.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer) {
 						klog.V(4).Infof("test %q succeeded. PVCFinalizer is added to PVC %s", test.name, pvc.Name)
 						bHasPVCFinalizer = true
 					}
@@ -1372,7 +1335,7 @@ func evaluateFinalizerTests(ctrl *csiSnapshotCommonController, reactor *snapshot
 		if funcName == "testRemovePVCFinalizer" {
 			for _, pvc := range reactor.claims {
 				if test.initialClaims[0].Name == pvc.Name {
-					if slice.ContainsString(test.initialClaims[0].ObjectMeta.Finalizers, utils.PVCFinalizer, nil) && !slice.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer, nil) {
+					if utils.ContainsString(test.initialClaims[0].ObjectMeta.Finalizers, utils.PVCFinalizer) && !utils.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer) {
 						klog.V(4).Infof("test %q succeeded. PVCFinalizer is removed from PVC %s", test.name, pvc.Name)
 						bHasPVCFinalizer = false
 					}
@@ -1387,8 +1350,8 @@ func evaluateFinalizerTests(ctrl *csiSnapshotCommonController, reactor *snapshot
 		if funcName == "testAddSnapshotFinalizer" {
 			for _, snapshot := range reactor.snapshots {
 				if test.initialSnapshots[0].Name == snapshot.Name {
-					if !slice.ContainsString(test.initialSnapshots[0].ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer, nil) && slice.ContainsString(snapshot.ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer, nil) &&
-						!slice.ContainsString(test.initialSnapshots[0].ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer, nil) && slice.ContainsString(snapshot.ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer, nil) {
+					if !utils.ContainsString(test.initialSnapshots[0].ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer) && utils.ContainsString(snapshot.ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer) &&
+						!utils.ContainsString(test.initialSnapshots[0].ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer) && utils.ContainsString(snapshot.ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer) {
 						klog.V(4).Infof("test %q succeeded. Finalizers are added to snapshot %s", test.name, snapshot.Name)
 						bHasSnapshotFinalizer = true
 					}
@@ -1403,8 +1366,8 @@ func evaluateFinalizerTests(ctrl *csiSnapshotCommonController, reactor *snapshot
 		if funcName == "testRemoveSnapshotFinalizer" {
 			for _, snapshot := range reactor.snapshots {
 				if test.initialSnapshots[0].Name == snapshot.Name {
-					if slice.ContainsString(test.initialSnapshots[0].ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer, nil) && !slice.ContainsString(snapshot.ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer, nil) &&
-						slice.ContainsString(test.initialSnapshots[0].ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer, nil) && !slice.ContainsString(snapshot.ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer, nil) {
+					if utils.ContainsString(test.initialSnapshots[0].ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer) && !utils.ContainsString(snapshot.ObjectMeta.Finalizers, utils.VolumeSnapshotBoundFinalizer) &&
+						utils.ContainsString(test.initialSnapshots[0].ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer) && !utils.ContainsString(snapshot.ObjectMeta.Finalizers, utils.VolumeSnapshotAsSourceFinalizer) {
 						klog.V(4).Infof("test %q succeeded. SnapshotFinalizer is removed from Snapshot %s", test.name, snapshot.Name)
 						bHasSnapshotFinalizer = false
 					}
diff --git a/pkg/common-controller/snapshot_update_test.go b/pkg/common-controller/snapshot_update_test.go
index 77fbf5647..64295e771 100644
--- a/pkg/common-controller/snapshot_update_test.go
+++ b/pkg/common-controller/snapshot_update_test.go
@@ -24,6 +24,7 @@ import (
 	crdv1 "github.com/kubernetes-csi/external-snapshotter/v2/pkg/apis/volumesnapshot/v1beta1"
 	"github.com/kubernetes-csi/external-snapshotter/v2/pkg/utils"
 	v1 "k8s.io/api/core/v1"
+	storagev1beta1 "k8s.io/api/storage/v1beta1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
@@ -31,6 +32,11 @@ var metaTimeNow = &metav1.Time{
 	Time: time.Now(),
 }
 
+var volumeErr = &storagev1beta1.VolumeError{
+	Time:    *metaTimeNow,
+	Message: "Failed to upload the snapshot",
+}
+
 var emptyString = ""
 
 // Test single call to syncSnapshot and syncContent methods.
@@ -40,7 +46,6 @@ var emptyString = ""
 // 3. Compare resulting contents and snapshots with expected contents and snapshots.
 func TestSync(t *testing.T) {
 	size := int64(1)
-	snapshotErr := newVolumeError("Mock content error")
 	tests := []controllerTest{
 		{
 			// snapshot is bound to a non-existing content
@@ -454,62 +459,6 @@ func TestSync(t *testing.T) {
 			expectSuccess:     false,
 			test:              testSyncContentError,
 		},
-		{
-			// Update Error in snapshot status based on content status
-			name:              "6-1 - update snapshot error status",
-			initialContents:   newContentArrayWithError("content6-1", "snapuid6-1", "snap6-1", "sid6-1", validSecretClass, "", "", deletionPolicy, nil, nil, false, snapshotErr),
-			expectedContents:  newContentArrayWithError("content6-1", "snapuid6-1", "snap6-1", "sid6-1", validSecretClass, "", "", deletionPolicy, nil, nil, false, snapshotErr),
-			initialSnapshots:  newSnapshotArray("snap6-1", "snapuid6-1", "claim6-1", "", validSecretClass, "content6-1", &False, nil, nil, nil, false, true, nil),
-			expectedSnapshots: newSnapshotArray("snap6-1", "snapuid6-1", "claim6-1", "", validSecretClass, "content6-1", &False, nil, nil, snapshotErr, false, true, nil),
-			initialClaims:     newClaimArray("claim6-1", "pvc-uid6-1", "1Gi", "volume6-1", v1.ClaimBound, &classEmpty),
-			initialVolumes:    newVolumeArray("volume6-1", "pv-uid6-1", "pv-handle6-1", "1Gi", "pvc-uid6-1", "claim6-1", v1.VolumeBound, v1.PersistentVolumeReclaimDelete, classEmpty),
-			initialSecrets:    []*v1.Secret{secret()},
-			errors:            noerrors,
-			expectSuccess:     true,
-			test:              testUpdateSnapshotErrorStatus,
-		},
-		{
-			// Clear out Error in snapshot status if no Error in content status
-			name:              "6-2 - clear out snapshot error status",
-			initialContents:   newContentArray("content6-2", "snapuid6-2", "snap6-2", "sid6-2", validSecretClass, "", "", deletionPolicy, nil, nil, false),
-			expectedContents:  newContentArray("content6-2", "snapuid6-2", "snap6-2", "sid6-2", validSecretClass, "", "", deletionPolicy, nil, nil, false),
-			initialSnapshots:  newSnapshotArray("snap6-2", "snapuid6-2", "claim6-2", "", validSecretClass, "content6-2", &False, metaTimeNow, nil, snapshotErr, false, true, nil),
-			expectedSnapshots: newSnapshotArray("snap6-2", "snapuid6-2", "claim6-2", "", validSecretClass, "content6-2", &True, metaTimeNow, nil, nil, false, true, nil),
-			initialClaims:     newClaimArray("claim6-2", "pvc-uid6-2", "1Gi", "volume6-2", v1.ClaimBound, &classEmpty),
-			initialVolumes:    newVolumeArray("volume6-2", "pv-uid6-2", "pv-handle6-2", "1Gi", "pvc-uid6-2", "claim6-2", v1.VolumeBound, v1.PersistentVolumeReclaimDelete, classEmpty),
-			initialSecrets:    []*v1.Secret{secret()},
-			errors:            noerrors,
-			expectSuccess:     true,
-			test:              testUpdateSnapshotErrorStatus,
-		},
-		{
-			// Snapshot status is nil, but gets updated to Error status based on content status
-			name:              "6-3 - nil snapshot status updated with error status from content",
-			initialContents:   newContentArrayWithError("content6-3", "snapuid6-3", "snap6-3", "sid6-3", validSecretClass, "", "", deletionPolicy, nil, nil, false, snapshotErr),
-			expectedContents:  newContentArrayWithError("content6-3", "snapuid6-3", "snap6-3", "sid6-3", validSecretClass, "", "", deletionPolicy, nil, nil, false, snapshotErr),
-			initialSnapshots:  newSnapshotArray("snap6-3", "snapuid6-3", "claim6-3", "", validSecretClass, "", nil, nil, nil, nil, true, true, nil),
-			expectedSnapshots: newSnapshotArray("snap6-3", "snapuid6-3", "claim6-3", "", validSecretClass, "content6-3", &False, nil, nil, snapshotErr, false, true, nil),
-			initialClaims:     newClaimArray("claim6-3", "pvc-uid6-3", "1Gi", "volume6-3", v1.ClaimBound, &classEmpty),
-			initialVolumes:    newVolumeArray("volume6-3", "pv-uid6-3", "pv-handle6-3", "1Gi", "pvc-uid6-3", "claim6-3", v1.VolumeBound, v1.PersistentVolumeReclaimDelete, classEmpty),
-			initialSecrets:    []*v1.Secret{secret()},
-			errors:            noerrors,
-			expectSuccess:     true,
-			test:              testUpdateSnapshotErrorStatus,
-		},
-		{
-			// Snapshot status and content status are both nil, create snapshot status with boundContentName and readyToUse set to false
-			name:              "6-4 - both snapshot status and content status are nil",
-			initialContents:   newContentArrayNoStatus("content6-4", "snapuid6-4", "snap6-4", "sid6-4", validSecretClass, "", "", deletionPolicy, nil, nil, false, false),
-			expectedContents:  newContentArrayNoStatus("content6-4", "snapuid6-4", "snap6-4", "sid6-4", validSecretClass, "", "", deletionPolicy, nil, nil, false, false),
-			initialSnapshots:  newSnapshotArray("snap6-4", "snapuid6-4", "claim6-4", "", validSecretClass, "", nil, nil, nil, nil, true, false, nil),
-			expectedSnapshots: newSnapshotArray("snap6-4", "snapuid6-4", "claim6-4", "", validSecretClass, "content6-4", &False, nil, nil, nil, false, false, nil),
-			initialClaims:     newClaimArray("claim6-4", "pvc-uid6-4", "1Gi", "volume6-3", v1.ClaimBound, &classEmpty),
-			initialVolumes:    newVolumeArray("volume6-4", "pv-uid6-4", "pv-handle6-4", "1Gi", "pvc-uid6-4", "claim6-4", v1.VolumeBound, v1.PersistentVolumeReclaimDelete, classEmpty),
-			initialSecrets:    []*v1.Secret{secret()},
-			errors:            noerrors,
-			expectSuccess:     true,
-			test:              testUpdateSnapshotErrorStatus,
-		},
 	}
 
 	runSyncTests(t, tests, snapshotClasses)
diff --git a/pkg/utils/util_test.go b/pkg/utils/util_test.go
index d3a371919..84ba5f054 100644
--- a/pkg/utils/util_test.go
+++ b/pkg/utils/util_test.go
@@ -25,6 +25,58 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
+func TestContainsString(t *testing.T) {
+	src := []string{"aa", "bb", "cc"}
+	if !ContainsString(src, "bb") {
+		t.Errorf("ContainsString didn't find the string as expected")
+	}
+}
+
+func TestRemoveString(t *testing.T) {
+	tests := []struct {
+		testName string
+		input    []string
+		remove   string
+		want     []string
+	}{
+		{
+			testName: "Nil input slice",
+			input:    nil,
+			remove:   "",
+			want:     nil,
+		},
+		{
+			testName: "Slice doesn't contain the string",
+			input:    []string{"a", "ab", "cdef"},
+			remove:   "NotPresentInSlice",
+			want:     []string{"a", "ab", "cdef"},
+		},
+		{
+			testName: "All strings removed, result is nil",
+			input:    []string{"a"},
+			remove:   "a",
+			want:     nil,
+		},
+		{
+			testName: "One string removed",
+			input:    []string{"a", "ab", "cdef"},
+			remove:   "ab",
+			want:     []string{"a", "cdef"},
+		},
+		{
+			testName: "All(three) strings removed",
+			input:    []string{"ab", "a", "ab", "cdef", "ab"},
+			remove:   "ab",
+			want:     []string{"a", "cdef"},
+		},
+	}
+	for _, tt := range tests {
+		if got := RemoveString(tt.input, tt.remove); !reflect.DeepEqual(got, tt.want) {
+			t.Errorf("%v: RemoveString(%v, %q) = %v WANT %v", tt.testName, tt.input, tt.remove, got, tt.want)
+		}
+	}
+}
+
 func TestGetSecretReference(t *testing.T) {
 	testcases := map[string]struct {
 		secretParams    secretParamsMap