test: exercise live standardise entrypoint help surface

Closes the Greptile test-gap by invoking standardise_command directly
and asserting the argparse help surface exposes check/report/fix/init,
instead of only checking module attributes.

Co-authored-by: Mervin Praison <[email protected]>

src/praisonai/tests/unit/standardise/test_cli_surface.py

@@ -1,8 +1,20 @@
 """Regression tests for the live standardise CLI surface."""
 
+import pytest
+
 from praisonai.cli.commands import standardise
 
 
 def test_standardise_module_exposes_only_the_live_cli_entrypoint():
     assert callable(standardise.standardise_command)
     assert not hasattr(standardise, "register_click_commands")
+
+
+def test_standardise_command_exposes_help_surface(capsys):
+    with pytest.raises(SystemExit) as excinfo:
+        standardise.standardise_command(["--help"])
+
+    assert excinfo.value.code == 0
+    help_output = capsys.readouterr().out
+    for subcommand in ("check", "report", "fix", "init"):
+        assert subcommand in help_output