tests/integration: Add tests for idmap mounts with userns

Signed-off-by: Francis Laniel <[email protected]>

tests/integration/idmap.bats

@@ -124,6 +124,29 @@ function teardown() {
 	[[ "$output" == *"=100001=100001="* ]]
 }
 
+# It fails because it does not detect the modification to uid/gid Mappings.
+@test "idmap mount with userns" {
+	update_config ' .linux.namespaces += [{"type": "user"}]
+		| .linux.uidMappings += [{"hostID": 100000, "containerID": 0, "size": 65536}]
+		| .linux.gidMappings += [{"hostID": 100000, "containerID": 0, "size": 65536}] '
+
+	runc run test_debian
+	[ "$status" -eq 0 ]
+	# With the user namespace, the id map mount UID 100000 is changed to 0.
+	[[ "$output" == *"=0=0="* ]]
+}
+
+@test "idmap mount with different userns" {
+	update_config ' .linux.namespaces += [{"type": "user"}]
+		| .linux.uidMappings += [{"hostID": 99999, "containerID": 0, "size": 65536}]
+		| .linux.gidMappings += [{"hostID": 99999, "containerID": 0, "size": 65536}] '
+
+	runc run test_debian
+	[ "$status" -eq 0 ]
+	# With the user namespace, the id map mount UID 100000 is changed to 1.
+	[[ "$output" == *"=1=1="* ]]
+}
+
 @test "idmap mount without gidMappings fails" {
 	update_config ' .mounts |= map((select(.source == "source-1/") | del(.gidMappings) ) // .)'