Fix test

tests/unit_tests/beamlines/i24/serial/extruder/test_extruder_collect.py

@@ -4,6 +4,7 @@
 import pytest
 from dodal.devices.zebra import DISCONNECT, SOFT_IN3
 from ophyd_async.testing import get_mock_put, set_mock_value
+from tests.unit_tests.beamlines.i24.serial.conftest import TEST_LUT
 
 from mx_bluesky.beamlines.i24.serial.extruder.i24ssx_Extruder_Collect_py3v2 import (
     TTL_EIGER,
@@ -22,7 +23,7 @@
 
 
 @pytest.fixture
-def dummy_params():
+def dummy_params(tmp_path):
     params = {
         "visit": "foo",
         "directory": "bar",
@@ -33,12 +34,22 @@ def dummy_params():
         "transmission": 1.0,
         "num_images": 10,
         "pump_status": False,
+        "collection_directory": str(tmp_path / "foo/bar"),
     }
-    return ExtruderParameters(**params)
+    with (
+        patch(
+            "mx_bluesky.beamlines.i24.serial.parameters.experiment_parameters.Path.mkdir"
+        ),
+        patch(
+            "mx_bluesky.beamlines.i24.serial.parameters.experiment_parameters.BEAM_CENTER_LUT_FILES",
+            new=TEST_LUT,
+        ),
+    ):
+        yield ExtruderParameters(**params)
 
 
 @pytest.fixture
-def dummy_params_pp():
+def dummy_params_pp(tmp_path):
     params_pp = {
         "visit": "foo",
         "directory": "bar",
@@ -51,8 +62,18 @@ def dummy_params_pp():
         "pump_status": True,
         "laser_dwell_s": 0.01,
         "laser_delay_s": 0.005,
+        "collection_directory": str(tmp_path / "foo/bar"),
     }
-    return ExtruderParameters(**params_pp)
+    with (
+        patch(
+            "mx_bluesky.beamlines.i24.serial.parameters.experiment_parameters.Path.mkdir"
+        ),
+        patch(
+            "mx_bluesky.beamlines.i24.serial.parameters.experiment_parameters.BEAM_CENTER_LUT_FILES",
+            new=TEST_LUT,
+        ),
+    ):
+        yield ExtruderParameters(**params_pp)
 
 
 @pytest.fixture