e2e: Add rootless mount cleanup test

`podman run -d mount cleanup test` adapt to rootless environment.

Signed-off-by: Toshiki Sonoda <sonoda.toshiki@fujitsu.com>

test/e2e/run_cleanup_test.go

@@ -36,7 +36,7 @@ var _ = Describe("Podman run exit", func() {
 
 	It("podman run -d mount cleanup test", func() {
 		SkipIfRemote("podman-remote does not support mount")
-		SkipIfRootless("TODO rootless podman mount requires podman unshare first")
+		SkipIfRootless("rootless podman mount requires podman unshare first")
 
 		result := podmanTest.Podman([]string{"run", "-dt", ALPINE, "top"})
 		result.WaitWithDefaultTimeout()
@@ -69,6 +69,49 @@ var _ = Describe("Podman run exit", func() {
 		pmount.WaitWithDefaultTimeout()
 		Expect(pmount).Should(Exit(0))
 		Expect(pmount.OutputToString()).NotTo(ContainSubstring(cid))
+	})
 
+	It("podman run -d mount cleanup rootless test", func() {
+		SkipIfRemote("podman-remote does not support mount")
+		SkipIfNotRootless("Use unshare in rootless only")
+
+		result := podmanTest.Podman([]string{"run", "-dt", ALPINE, "top"})
+		result.WaitWithDefaultTimeout()
+		cid := result.OutputToString()
+		Expect(result).Should(Exit(0))
+
+		mount := podmanTest.Podman([]string{"unshare", "mount"})
+		mount.WaitWithDefaultTimeout()
+		Expect(mount).Should(Exit(0))
+		Expect(mount.OutputToString()).To(ContainSubstring(cid))
+
+		// command: podman <options> unshare podman <options> image mount ALPINE
+		args := []string{"unshare", podmanTest.PodmanBinary}
+		opts := podmanTest.PodmanMakeOptions([]string{"mount", "--no-trunc"}, false, false)
+		args = append(args, opts...)
+
+		pmount := podmanTest.Podman(args)
+		pmount.WaitWithDefaultTimeout()
+		Expect(pmount).Should(Exit(0))
+		Expect(pmount.OutputToString()).To(ContainSubstring(cid))
+
+		stop := podmanTest.Podman([]string{"stop", cid})
+		stop.WaitWithDefaultTimeout()
+		Expect(stop).Should(Exit(0))
+
+		// We have to force cleanup so the unmount happens
+		podmanCleanupSession := podmanTest.Podman([]string{"container", "cleanup", cid})
+		podmanCleanupSession.WaitWithDefaultTimeout()
+		Expect(podmanCleanupSession).Should(Exit(0))
+
+		mount = podmanTest.Podman([]string{"unshare", "mount"})
+		mount.WaitWithDefaultTimeout()
+		Expect(mount).Should(Exit(0))
+		Expect(mount.OutputToString()).NotTo(ContainSubstring(cid))
+
+		pmount = podmanTest.Podman(args)
+		pmount.WaitWithDefaultTimeout()
+		Expect(pmount).Should(Exit(0))
+		Expect(pmount.OutputToString()).NotTo(ContainSubstring(cid))
 	})
 })