Add integration test for compose down

Signed-off-by: Songmin Li <lisongmin@protonmail.com>

tests/integration/compose_down_behavior/docker-compose_default.yaml

@@ -0,0 +1,12 @@
+services:
+  app:
+    image: nopush/podman-compose-test
+    command: ["dumb-init", "/bin/busybox", "httpd", "-f", "-p", "8080"]
+    depends_on:
+      - db
+  db:
+    image: nopush/podman-compose-test
+    command: ["dumb-init", "/bin/busybox", "httpd", "-f", "-p", "8080"]
+  no_deps:
+    image: nopush/podman-compose-test
+    command: ["dumb-init", "/bin/busybox", "httpd", "-f", "-p", "8080"]

tests/integration/compose_down_behavior/test_compose_down_behavior.py

@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: GPL-2.0
+
+import os
+import unittest
+
+from parameterized import parameterized
+
+from tests.integration.test_utils import RunSubprocessMixin
+from tests.integration.test_utils import podman_compose_path
+from tests.integration.test_utils import test_path
+
+
+def compose_yaml_path(scenario: str) -> str:
+    return os.path.join(
+        os.path.join(test_path(), "compose_down_behavior"), f"docker-compose_{scenario}.yaml"
+    )
+
+
+class TestComposeDownBehavior(unittest.TestCase, RunSubprocessMixin):
+    @parameterized.expand([
+        ("default", ["down"], set()),
+        (
+            "default",
+            ["down", "app"],
+            {
+                "compose_down_behavior_db_1",
+                "compose_down_behavior_no_deps_1",
+            },
+        ),
+        (
+            "default",
+            ["down", "db"],
+            {
+                "compose_down_behavior_no_deps_1",
+            },
+        ),
+    ])
+    def test_compose_down(
+        self, scenario: str, command_args: list[str], expect_containers: set[str]
+    ) -> None:
+        try:
+            self.run_subprocess_assert_returncode(
+                [podman_compose_path(), "-f", compose_yaml_path(scenario), "up", "-d"],
+            )
+
+            self.run_subprocess_assert_returncode(
+                [
+                    podman_compose_path(),
+                    "-f",
+                    compose_yaml_path(scenario),
+                    *command_args,
+                ],
+            )
+
+            out, _ = self.run_subprocess_assert_returncode(
+                [
+                    podman_compose_path(),
+                    "-f",
+                    compose_yaml_path(scenario),
+                    "ps",
+                    "--format",
+                    '{{ .Names }}',
+                ],
+            )
+
+            actual_containers = set()
+            for line in out.decode('utf-8').strip().split('\n'):
+                name = line.strip()
+                if name:
+                    actual_containers.add(name)
+
+            self.assertEqual(actual_containers, expect_containers)
+        finally:
+            self.run_subprocess_assert_returncode([
+                podman_compose_path(),
+                "-f",
+                compose_yaml_path(scenario),
+                "down",
+                "-t",
+                "0",
+            ])