Extends unit test with excluded regions

Author: AndrewSazonov

tests/functional_tests/fitting/test_powder-diffraction_multiphase.py

@@ -56,6 +56,9 @@ def test_single_fit_neutron_pd_tof_mcstas_lbco_si() -> None:
     project.sample_models.add(model_2)
     project.experiments.add(expt)
 
+    # Exclude regions from fitting
+    project.experiments['mcstas'].excluded_regions.add(minimum=108000, maximum=200000)
+
     # Prepare for fitting
     project.analysis.current_calculator = 'cryspy'
     project.analysis.current_minimizer = 'lmfit (leastsq)'
@@ -84,7 +87,7 @@ def test_single_fit_neutron_pd_tof_mcstas_lbco_si() -> None:
 
     # Compare fit quality
     assert_almost_equal(project.analysis.fit_results.reduced_chi_square,
-                        desired=1.79,  # 2.87
+                        desired=2.87,
                         decimal=1)