Fix test for empty ontology

Author: Val Brodsky

libs/labelbox/src/labelbox/schema/project.py

@@ -149,6 +149,12 @@ def is_chat_evaluation(self) -> bool:
     def is_auto_data_generation(self) -> bool:
         return (self.upload_type == UploadType.Auto)  # type: ignore
 
+    # we test not only the project ontology is None, but also a default empty ontology that we create when we attach a labeling front end in createLabelingFrontendOptions
+    def is_empty_ontology(self) -> bool:
+        ontology = self.ontology()  # type: ignore
+        return ontology is None or (len(ontology.tools()) == 0 and
+                                    len(ontology.classifications()) == 0)
+
     def project_model_configs(self):
         query_str = """query ProjectModelConfigsPyApi($id: ID!) {
             project(where: {id : $id}) {
@@ -791,6 +797,9 @@ def connect_ontology(self, ontology) -> None:
                 "classifications": []
             })
 
+        if not self.is_empty_ontology():
+            raise ValueError("Ontology already connected to project.")
+
         query_str = """mutation ConnectOntologyPyApi($projectId: ID!, $ontologyId: ID!){
             project(where: {id: $projectId}) {connectOntology(ontologyId: $ontologyId) {id}}}"""
         self.client.execute(query_str, {

libs/labelbox/tests/integration/test_project_setup.py

@@ -68,10 +68,10 @@ def test_project_editor_setup(client, project, rand_gen):
            ] == [ontology_name]
 
 
-def test_project_editor_setup_cant_call_multiple_times(client, project,
-                                                       rand_gen):
+def test_project_connect_ontology_cant_call_multiple_times(
+        client, project, rand_gen):
     ontology_name = f"test_project_editor_setup_ontology_name-{rand_gen(str)}"
     ontology = client.create_ontology(ontology_name, simple_ontology())
     project.connect_ontology(ontology)
-    with pytest.raises(ResourceConflict):
+    with pytest.raises(ValueError):
         project.connect_ontology(ontology)