add test for etcd-snapshot delete on s3

Signed-off-by: Ian Cardoso <osodracnai@gmail.com>

tests/e2e/s3/s3_test.go

@@ -114,6 +114,15 @@ var _ = Describe("Verify Create", Ordered, func() {
 			Expect(res).To(ContainSubstring("special-2-server-0"))
 			Expect(res).To(ContainSubstring("special-3-server-0"))
 		})
+		It("delete first on-demand s3 snapshot", func() {
+			_, err := e2e.RunCmdOnNode("sudo k3s etcd-snapshot ls >> ./snapshotname.txt", serverNodeNames[0])
+			Expect(err).NotTo(HaveOccurred())
+			b, err := e2e.RunCmdOnNode("grep -Eo 'on-demand-server-0-([0-9]+)' ./snapshotname.txt | sed 's/^/on-demand-server-0-/'| head -1", serverNodeNames[0])
+			Expect(err).NotTo(HaveOccurred())
+			_, err = e2e.RunCmdOnNode("sudo k3s etcd-snapshot delete "+b, serverNodeNames[0])
+			Expect(err).NotTo(HaveOccurred())
+		})
+
 		// TODO, there is currently a bug that prevents pruning on s3 snapshots that are not prefixed with "on-demand"
 		// https://github.com/rancher/rke2/issues/3714
 		// Once fixed, ensure that the snapshots list are actually reduced to 2