add csi-test to vendor

vendor/github.com/kubernetes-csi/csi-test/mock/cache/SnapshotCache.go

@@ -0,0 +1,89 @@
+package cache
+
+import (
+	"strings"
+	"sync"
+
+	"github.com/container-storage-interface/spec/lib/go/csi/v0"
+)
+
+type SnapshotCache interface {
+	Add(snapshot Snapshot)
+
+	Delete(i int)
+
+	List(status csi.SnapshotStatus_Type) []csi.Snapshot
+
+	FindSnapshot(k, v string) (int, Snapshot)
+}
+
+type Snapshot struct {
+	Name        string
+	Parameters  map[string]string
+	SnapshotCSI csi.Snapshot
+}
+
+type snapshotCache struct {
+	snapshotsRWL sync.RWMutex
+	snapshots    []Snapshot
+}
+
+func NewSnapshotCache() SnapshotCache {
+	return &snapshotCache{
+		snapshots: make([]Snapshot, 0),
+	}
+}
+
+func (snap *snapshotCache) Add(snapshot Snapshot) {
+	snap.snapshotsRWL.Lock()
+	defer snap.snapshotsRWL.Unlock()
+
+	snap.snapshots = append(snap.snapshots, snapshot)
+}
+
+func (snap *snapshotCache) Delete(i int) {
+	snap.snapshotsRWL.Lock()
+	defer snap.snapshotsRWL.Unlock()
+
+	copy(snap.snapshots[i:], snap.snapshots[i+1:])
+	snap.snapshots = snap.snapshots[:len(snap.snapshots)-1]
+}
+
+func (snap *snapshotCache) List(status csi.SnapshotStatus_Type) []csi.Snapshot {
+	snap.snapshotsRWL.RLock()
+	defer snap.snapshotsRWL.RUnlock()
+
+	snapshots := make([]csi.Snapshot, 0)
+	for _, v := range snap.snapshots {
+		if v.SnapshotCSI.GetStatus() != nil && v.SnapshotCSI.GetStatus().Type == status {
+			snapshots = append(snapshots, v.SnapshotCSI)
+		}
+	}
+
+	return snapshots
+}
+
+func (snap *snapshotCache) FindSnapshot(k, v string) (int, Snapshot) {
+	snap.snapshotsRWL.RLock()
+	defer snap.snapshotsRWL.RUnlock()
+
+	snapshotIdx := -1
+	for i, vi := range snap.snapshots {
+		switch k {
+		case "id":
+			if strings.EqualFold(v, vi.SnapshotCSI.Id) {
+				return i, vi
+			}
+		case "sourceVolumeId":
+			if strings.EqualFold(v, vi.SnapshotCSI.SourceVolumeId) {
+				return i, vi
+			}
+		case "name":
+			if vi.Name == v {
+				return i, vi
+			}
+		}
+	}
+
+	return snapshotIdx, Snapshot{}
+}