Minor issue that parameters are resolved as strings

src/shiver/models/generate_dgs_mde.py

@@ -237,15 +237,18 @@ def PyExec(self):  # pylint: disable=too-many-branches
         if mask_filename:
             __mask = LoadNexusProcessed(Filename=mask_filename)
         mask_btp_inputs = self.getPropertyValue("MaskInputs")
+        # check if the string is not empty
         if mask_btp_inputs:
-            if not __mask:
-                __mask = LoadEventNexus(Filename=filename_nested_list[0][0], MetadataOnly=True)
-            btp_pars_list = json.loads(mask_btp_inputs.replace("'", '"'))
-            for pars in btp_pars_list:
-                MaskBTP(Workspace=__mask, **pars)
+            btp_pars_list = json.loads(mask_btp_inputs)
+            # check if the btp_pars_list has items
+            if len(btp_pars_list) > 0:
+                if not __mask:
+                    __mask = LoadEventNexus(Filename=filename_nested_list[0][0], MetadataOnly=True)
+                for pars in btp_pars_list:
+                    MaskBTP(Workspace=__mask, **pars)
         cdsm_dict["MaskWorkspace"] = __mask
 
-        filter_bad_pulses_flag = self.getPropertyValue("ApplyFilterBadPulses")
+        filter_bad_pulses_flag = self.getProperty("ApplyFilterBadPulses").value
         filter_threshold = None
         if filter_bad_pulses_flag:
             filter_threshold = self.getPropertyValue("BadPulsesThreshold")

tests/models/test_generate_model.py

@@ -3,6 +3,8 @@
 import time
 import os
 import pytest
+import shiver.models.convert_dgs_to_single_mde  # noqa: F401, E402 pylint: disable=unused-import, wrong-import-order
+import shiver.models.generate_dgs_mde  # noqa: F401, E402 pylint: disable=unused-import, wrong-import-order
 from mantid.simpleapi import Load
 from shiver.models.generate import (
     GenerateModel,

tests/models/test_generatemde.py

@@ -103,6 +103,45 @@ def test_convert_dgs_to_single_mde_mask():
     assert md1.getNEvents() == 415
 
 
+def test_convert_dgs_to_single_mde_mask_empty():
+    """Test for MaskInputs empty option ConvertDGSToSingleMDE"""
+
+    raw_data_folder = os.path.join(os.path.dirname(__file__), "../data/raw")
+
+    # custom mask
+    md1 = GenerateDGSMDE(
+        Filenames=os.path.join(raw_data_folder, "HYS_178921.nxs.h5"),
+        MaskInputs='[{"Bank": "1", "Tube": "1", "Pixel": "1"}]',
+        Ei=25.0,
+        T0=112.0,
+        TimeIndependentBackground="Default",
+    )
+
+    assert md1.getNEvents() == 24750
+
+    # implicit mask in the algorithm first and last 8 pixels in each tube
+    md2 = GenerateDGSMDE(
+        Filenames=os.path.join(raw_data_folder, "HYS_178921.nxs.h5"),
+        MaskInputs="[]",
+        Ei=25.0,
+        T0=112.0,
+        TimeIndependentBackground="Default",
+    )
+
+    assert md2.getNEvents() == 23682
+
+    # explicit mask in the algorithm first and last 8 pixels in each tube
+    md3 = GenerateDGSMDE(
+        Filenames=os.path.join(raw_data_folder, "HYS_178921.nxs.h5"),
+        MaskInputs='[{"Bank": "", "Tube": "", "Pixel": "1-8,121-128"}]',
+        Ei=25.0,
+        T0=112.0,
+        TimeIndependentBackground="Default",
+    )
+
+    assert md3.getNEvents() == md2.getNEvents()
+
+
 def test_convert_dgs_to_single_mde_additional_dims():
     """Test for Additional Dimensions option ConvertDGSToSingleMDE"""