feat: add e2e tests for PVC size modification with resource modifiers

- Add comprehensive test suite for PVC size modification across backup methods
- Create tests for CSI Snapshot, FileSystem Backup, and CSI DataMover
- Tests verify PVC size can be increased from 1Gi to 5Gi during restore
- Add test to GitHub Actions workflow (FSB only, CSI not supported in kind per #7507)
- Validates fix for issue #3854 where resource modifiers can adjust PVC sizes

Tests ensure that resource modifiers correctly handle PVC size modifications
during restore operations, supporting the generic restore workflow.

Related issues: #3854, #7507, #9270

Signed-off-by: Tiger Kaovilai <[email protected]>

Author: kaovilai

.github/workflows/e2e-test-kind.yaml

@@ -60,14 +60,16 @@ jobs:
         # grep -E "v[1-9]\.(2[5-9]|[3-9][0-9])" filters for v1.25 to v9.99
         # and removes older patches of the same minor version
         # awk -F. '{if(!a[$1"."$2]++)print $1"."$2"."$NF}'
+        # Note: PVC size modifier test included for FileSystem Backup only (CSI not supported in kind per #7507)
         run: |
           echo "matrix={\
             \"k8s\":$(wget -q -O - "https://hub.docker.com/v2/namespaces/kindest/repositories/node/tags?page_size=50" | grep -o '"name": *"[^"]*' | grep -o '[^"]*$' | grep -v -E "alpha|beta" | grep -E "v[1-9]\.(2[5-9]|[3-9][0-9])" | awk -F. '{if(!a[$1"."$2]++)print $1"."$2"."$NF}' | sort -r | sed s/v//g | jq -R -c -s 'split("\n")[:-1]'),\
             \"labels\":[\
               \"Basic && (ClusterResource || NodePort || StorageClass)\", \
               \"ResourceFiltering && !Restic\", \
               \"ResourceModifier || (Backups && BackupsSync) || PrivilegesMgmt || OrderedResources\", \
-              \"(NamespaceMapping && Single && Restic) || (NamespaceMapping && Multiple && Restic)\"\
+              \"(NamespaceMapping && Single && Restic) || (NamespaceMapping && Multiple && Restic)\", \
+              \"ResourceModifier && PVCSize && FSB\"\
             ]}" >> $GITHUB_OUTPUT
 
   # Run E2E test against all Kubernetes versions on kind

test/e2e/e2e_suite_test.go

@@ -554,6 +554,24 @@ var _ = Describe(
 	ResourceModifiersTest,
 )
 
+var _ = Describe(
+	"Velero test on PVC size modification with resource modifiers for CSI Snapshot",
+	Label("ResourceModifier", "PVCSize", "CSI", "Snapshot", "SkipVanillaZfs"),
+	CSISnapshotPVCSizeModifierTest,
+)
+
+var _ = Describe(
+	"Velero test on PVC size modification with resource modifiers for FileSystem Backup",
+	Label("ResourceModifier", "PVCSize", "FSB", "Restic"),
+	KopiaFSBackupPVCSizeModifierTest,
+)
+
+var _ = Describe(
+	"Velero test on PVC size modification with resource modifiers for CSI DataMover",
+	Label("ResourceModifier", "PVCSize", "CSI", "DataMover", "SnapshotDataMover"),
+	CSIDataMoverPVCSizeModifierTest,
+)
+
 var _ = Describe(
 	"Velero tests of Restic backup deletion",
 	Label("Backups", "Deletion", "Restic"),