Fix test_graph.py with right numbers of nodes and edges for each test (for items and collections)

Author: BenjaminCharmes

pydatalab/tests/server/test_graph.py

@@ -129,8 +129,8 @@ def test_simple_graph(admin_client):
     assert len(graph["edges"]) == 2
 
     graph = admin_client.get("/item-graph/parent").json
-    assert len(graph["nodes"]) == 6
-    assert len(graph["edges"]) == 5
+    assert len(graph["nodes"]) == 7
+    assert len(graph["edges"]) == 8
 
     samples = sample_list.json["responses"]
 
@@ -156,5 +156,5 @@ def test_simple_graph(admin_client):
     assert len(graph["edges"]) == 4
 
     graph = admin_client.get("/item-graph/parent").json
-    assert len(graph["nodes"]) == 6
-    assert len(graph["edges"]) == 5
+    assert len(graph["nodes"]) == 7
+    assert len(graph["edges"]) == 10