Allow display tests to pass if noodles promise not yet built

Author: raar1

fairworkflows/fairworkflow.py

@@ -332,6 +332,8 @@ def display(self, full_rdf=False):
         if full_rdf:
             return self.display_full_rdf()
         else:
+            if not hasattr(self, 'noodles_promise'):
+                raise ValueError('Cannot display workflow as no noodles promise has been constructed.')
             import noodles.tutorial
             noodles.tutorial.display_workflows(prefix='control', workflow=self.noodles_promise)
 

tests/test_fairworkflow.py

@@ -283,14 +283,14 @@ def test_draw_with_graphviz_module_and_dependency(self, tmp_path, test_workflow)
     def test_display_without_graphviz_module(self, test_workflow):
         """Test display method without graphviz python module installed."""
         with pytest.raises(ImportError):
-            test_workflow.display()
+            test_workflow.display(full_rdf=True)
 
     def test_display_with_graphviz_module_and_dependency(self, test_workflow):
         """
         Test display method with graphviz python module and graphviz software
         installed
         """
-        test_workflow.display()
+        test_workflow.display(full_rdf=True)
 
     @mock.patch('fairworkflows.rdf_wrapper.NanopubClient.publish')
     def test_publish_as_nanopub(self, mock_publish, test_workflow):