fix: final fixups for tests to pass

Modified ``test_outputmultipath_collapse`` due to a derivation of #2968.

Author: oesteban

nipype/pipeline/engine/nodes.py

@@ -1260,7 +1260,7 @@ def _run_interface(self, execute=True, updatehash=False):
                 stop_first=str2bool(
                     self.config['execution']['stop_on_first_crash'])))
         # And store results
-        _save_resultfile(result, cwd, self.name)
+        _save_resultfile(result, cwd, self.name, rebase=False)
         # remove any node directories no longer required
         dirs2remove = []
         for path in glob(op.join(cwd, 'mapflow', '*')):

nipype/pipeline/engine/tests/test_nodes.py

@@ -295,13 +295,13 @@ def test_inputs_removal(tmpdir):
 def test_outputmultipath_collapse(tmpdir):
     """Test an OutputMultiPath whose initial value is ``[[x]]`` to ensure that
     it is returned as ``[x]``, regardless of how accessed."""
-    select_if = niu.Select(inlist=[[1, 2, 3], [4]], index=1)
-    select_nd = pe.Node(niu.Select(inlist=[[1, 2, 3], [4]], index=1),
+    select_if = niu.Select(inlist=[[1, 2, 3], [4, 5]], index=1)
+    select_nd = pe.Node(niu.Select(inlist=[[1, 2, 3], [4, 5]], index=1),
                         name='select_nd')
 
     ifres = select_if.run()
     ndres = select_nd.run()
 
-    assert ifres.outputs.out == [4]
-    assert ndres.outputs.out == [4]
-    assert select_nd.result.outputs.out == [4]
+    assert ifres.outputs.out == [4, 5]
+    assert ndres.outputs.out == [4, 5]
+    assert select_nd.result.outputs.out == [4, 5]

nipype/pipeline/engine/utils.py

@@ -297,9 +297,14 @@ def load_resultfile(results_file, resolve=True):
         else:
             aggregate = False
 
-    if resolve and not aggregate:
+    if resolve and result.outputs:
+        try:
+            outputs = result.outputs.get()
+        except TypeError:  # This is a Bunch
+            return result, aggregate, attribute_error
+
         logger.debug('Resolving paths in outputs loaded from results file.')
-        for trait_name, old_value in list(result.outputs.get().items()):
+        for trait_name, old_value in list(outputs.items()):
             value = resolve_path_traits(result.outputs.trait(trait_name), old_value,
                                         results_file.parent)
             setattr(result.outputs, trait_name, value)