TEST: Thorough test of LaplacianThickness requirement cascade

Author: effigies

nipype/interfaces/ants/tests/test_segmentation.py

@@ -42,8 +42,18 @@ def test_LaplacianThickness_defaults(change_dir, create_lt):
 
 def test_LaplacianThickness_wrongargs(change_dir, create_lt):
     lt = create_lt
+    lt.inputs.tolerance = 0.001
+    with pytest.raises(ValueError, match=r".* requires a value for input 'sulcus_prior' .*"):
+        lt.cmdline
+    lt.inputs.sulcus_prior = 0.15
+    with pytest.raises(ValueError, match=r".* requires a value for input 'dT' .*"):
+        lt.cmdline
+    lt.inputs.dT = 0.01
+    with pytest.raises(ValueError, match=r".* requires a value for input 'prior_thickness' .*"):
+        lt.cmdline
     lt.inputs.prior_thickness = 5.9
-    # 500 must not be placed as smooth_param
-    assert lt.cmdline != 'LaplacianThickness functional.nii diffusion_weighted.nii functional_thickness.nii 5.9'
-    # probably should have just raised an exception that "smooth_param"
-    # should also be defined
+    with pytest.raises(ValueError, match=r".* requires a value for input 'smooth_param' .*"):
+        lt.cmdline
+    lt.inputs.smooth_param = 4.5
+    assert lt.cmdline == 'LaplacianThickness functional.nii diffusion_weighted.nii ' \
+        'functional_thickness.nii 4.5 5.9 0.01 0.15 0.001'