Skip YAML-dependent tests when PyYAML is unavailable

Author: zh1peng

tests/test_qa.py

@@ -3,6 +3,13 @@
 import unittest
 from pathlib import Path
 
+try:
+    import yaml as _yaml  # noqa: F401
+except ModuleNotFoundError:  # pragma: no cover
+    _HAS_YAML = False
+else:
+    _HAS_YAML = True
+
 
 class TestQAStatic(unittest.TestCase):
     def test_contract_lint_requires_required_columns(self):
@@ -17,6 +24,7 @@ def test_contract_lint_requires_required_columns(self):
         # Minimal OK
         contract_lint({"required_columns": ["condition"]})
 
+    @unittest.skipUnless(_HAS_YAML, "pyyaml is not installed")
     def test_static_qa_reads_acceptance_from_config_qa(self):
         from psyflow.qa.static import static_qa
 

tests/test_task_launcher.py

@@ -5,6 +5,13 @@
 from unittest.mock import patch
 import json
 
+try:
+    import yaml as _yaml  # noqa: F401
+except ModuleNotFoundError:  # pragma: no cover
+    _HAS_YAML = False
+else:
+    _HAS_YAML = True
+
 
 class TestTaskLauncher(unittest.TestCase):
     def test_run_task_shortcut_directory_with_config_and_passthrough(self):
@@ -113,6 +120,7 @@ def test_readme_maturity_badge_handles_non_utf8_readme(self):
             out = readme.read_text(encoding="cp1252")
             self.assertIn("Maturity: piloted", out)
 
+    @unittest.skipUnless(_HAS_YAML, "pyyaml is not installed")
     def test_run_qa_shortcut_requires_acceptance_criteria(self):
         from psyflow.task_launcher import run_qa_shortcut