add test_runner_runner_dict_import_failing

tests/test_coordinator.py

@@ -1,5 +1,6 @@
 import os
 import shutil
+import sys
 from pathlib import Path
 
 import pytest
@@ -41,3 +42,25 @@ def test_runner_runner_dict_import(tmp_recipes: Path):
 
     RUNNER_DICT = Coordinator.create_runner_dict(tmp_recipes)
     assert len(RUNNER_DICT.keys()) > 0
+
+
+@pytest.fixture
+def clear_sys_path():
+    """clear sys.path before test, restore after"""
+    syspath_copy = sys.path.copy()
+    sys.path.clear()
+    yield
+    sys.path.extend(syspath_copy)
+
+
+def test_runner_runner_dict_import_failing(tmp_recipes: Path, clear_sys_path, monkeypatch):
+    """import from recipes dict should work, because create_runner_dict has sys.path.append"""
+
+    monkeypatch.setattr(
+        Coordinator,
+        "add_to_sys",
+        lambda x: x,
+    )
+
+    with pytest.raises(ModuleNotFoundError):
+        Coordinator.create_runner_dict(tmp_recipes)