test/system: Test the resource limits

Note that the soft limit for the maximum number of open file descriptors
cannot be tested at the moment because Podman sets the Toolbx container
to have a value higher than the host's [1].

[1] containers/podman#17681

containers#213

test/system/210-ulimit.bats

@@ -0,0 +1,94 @@
+# shellcheck shell=bats
+#
+# Copyright © 2023 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+load 'libs/bats-support/load'
+load 'libs/bats-assert/load'
+load 'libs/helpers'
+
+setup() {
+  bats_require_minimum_version 1.7.0
+  _setup_environment
+  cleanup_containers
+}
+
+teardown() {
+  cleanup_containers
+}
+
+@test "ulimit: socket buffer size (hard)" {
+  local limit
+  limit=$(ulimit -H -b)
+
+  create_default_container
+
+  run --keep-empty-lines --separate-stderr "$TOOLBOX" run ulimit -H -b
+
+  assert_success
+  assert_line --index 0 "$limit"
+  assert [ ${#lines[@]} -eq 2 ]
+
+  # shellcheck disable=SC2154
+  assert [ ${#stderr_lines[@]} -eq 0 ]
+}
+
+@test "ulimit: socket buffer size (soft)" {
+  local limit
+  limit=$(ulimit -S -b)
+
+  create_default_container
+
+  run --keep-empty-lines --separate-stderr "$TOOLBOX" run ulimit -S -b
+
+  assert_success
+  assert_line --index 0 "$limit"
+  assert [ ${#lines[@]} -eq 2 ]
+
+  # shellcheck disable=SC2154
+  assert [ ${#stderr_lines[@]} -eq 0 ]
+}
+
+@test "ulimit: number of open file descriptors (hard)" {
+  local limit
+  limit=$(ulimit -H -n)
+
+  create_default_container
+
+  run --keep-empty-lines --separate-stderr "$TOOLBOX" run ulimit -H -n
+
+  assert_success
+  assert_line --index 0 "$limit"
+  assert [ ${#lines[@]} -eq 2 ]
+
+  # shellcheck disable=SC2154
+  assert [ ${#stderr_lines[@]} -eq 0 ]
+}
+
+@test "ulimit: number of open file descriptors (soft)" {
+  local limit
+  limit=$(ulimit -H -n)
+
+  create_default_container
+
+  run --keep-empty-lines --separate-stderr "$TOOLBOX" run ulimit -S -n
+
+  assert_success
+  assert_line --index 0 "$limit"
+  assert [ ${#lines[@]} -eq 2 ]
+
+  # shellcheck disable=SC2154
+  assert [ ${#stderr_lines[@]} -eq 0 ]
+}

test/system/meson.build

@@ -1,6 +1,7 @@
 test_system = files(
   '201-ipc.bats',
   '203-network.bats',
+  '210-ulimit.bats',
 )
 
 if shellcheck.found()