test: add group-level --path propagation tests (#60)

tests/copilot_usage/test_cli.py

@@ -748,6 +748,41 @@ def test_group_path_propagates_to_live(tmp_path: Path) -> None:
     assert result.exit_code == 0
 
 
+def test_summary_group_path_propagation(tmp_path: Path) -> None:
+    """summary reads --path from group level when not provided at subcommand level."""
+    _write_session(tmp_path, "grp10000-0000-0000-0000-000000000000", name="GroupPath")
+    runner = CliRunner()
+    # --path before subcommand name → stored in ctx.obj, not subcommand
+    result = runner.invoke(main, ["--path", str(tmp_path), "summary"])
+    assert result.exit_code == 0
+    assert "GroupPath" in result.output
+
+
+def test_cost_group_path_propagation(tmp_path: Path) -> None:
+    _write_session(tmp_path, "grp20000-0000-0000-0000-000000000000", name="CostGroup")
+    runner = CliRunner()
+    result = runner.invoke(main, ["--path", str(tmp_path), "cost"])
+    assert result.exit_code == 0
+
+
+def test_live_group_path_propagation(tmp_path: Path) -> None:
+    _write_session(
+        tmp_path, "grp30000-0000-0000-0000-000000000000", name="LiveGroup", active=True
+    )
+    runner = CliRunner()
+    result = runner.invoke(main, ["--path", str(tmp_path), "live"])
+    assert result.exit_code == 0
+
+
+def test_session_group_path_propagation(tmp_path: Path) -> None:
+    sid = "grp40000-0000-0000-0000-000000000000"
+    _write_session(tmp_path, sid, name="SessGroup")
+    runner = CliRunner()
+    # session needs the session_id positional argument
+    result = runner.invoke(main, ["--path", str(tmp_path), "session", sid[:8]])
+    assert result.exit_code == 0
+
+
 # 5. Auto-refresh branches in _interactive_loop -------------------------------