Split exec args parsing into new function and add unit tests for it

Signed-off-by: Ari Pollak <ajp@aripollak.com>

podman_compose.py

@@ -2502,6 +2502,12 @@ async def compose_exec(compose, args):
     container_names = compose.container_names_by_service[args.service]
     container_name = container_names[args.index - 1]
     cnt = compose.container_by_name[container_name]
+    podman_args = compose_exec_args(cnt, container_name, args)
+    p = await compose.podman.run([], "exec", podman_args)
+    sys.exit(p)
+
+
+def compose_exec_args(cnt, container_name, args):
     podman_args = ["--interactive"]
     if args.privileged:
         podman_args += ["--privileged"]
@@ -2522,8 +2528,7 @@ async def compose_exec(compose, args):
     podman_args += [container_name]
     if args.cnt_command is not None and len(args.cnt_command) > 0:
         podman_args += args.cnt_command
-    p = await compose.podman.run([], "exec", podman_args)
-    sys.exit(p)
+    return podman_args
 
 
 async def transfer_service_status(compose, args, action):

pytests/test_compose_exec_args.py

@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0
+
+import argparse
+import unittest
+
+from podman_compose import compose_exec_args
+
+
+class TestExecArgs(unittest.TestCase):
+    def test_minimal(self):
+        cnt = get_minimal_container()
+        args = get_minimal_args()
+
+        result = compose_exec_args(cnt, "container_name", args)
+        expected = ["--interactive", "--tty", "container_name"]
+        self.assertEqual(result, expected)
+
+    def test_additional_env_value_equals(self):
+        cnt = get_minimal_container()
+        args = get_minimal_args()
+        args.env = ["key=valuepart1=valuepart2"]
+
+        result = compose_exec_args(cnt, "container_name", args)
+        expected = [
+            "--interactive",
+            "--tty",
+            "--env",
+            "key=valuepart1=valuepart2",
+            "container_name",
+        ]
+        self.assertEqual(result, expected)
+
+
+def get_minimal_container():
+    return {}
+
+
+def get_minimal_args():
+    return argparse.Namespace(
+        T=None,
+        cnt_command=None,
+        env=None,
+        privileged=None,
+        user=None,
+        workdir=None,
+    )