web: register the hohmann transfer tool and check graph references

src/state.rs

@@ -82,5 +82,52 @@ mod tests {
             state.docs.missing_links().is_empty(),
             "every cross reference should resolve"
         );
+        for graph in std::iter::once(&state.graph.concepts).chain(state.graph.flows.iter()) {
+            assert!(
+                graph.dangling_edges().is_empty(),
+                "every edge of {} should connect two nodes",
+                graph.id
+            );
+        }
+    }
+
+    #[test]
+    fn graph_nodes_point_at_documents_and_interface_items() {
+        let state = AppState::new();
+        let graphs = std::iter::once(&state.graph.concepts).chain(state.graph.flows.iter());
+        for graph in graphs {
+            for node in &graph.nodes {
+                if let Some(id) = &node.document {
+                    assert!(
+                        state.docs.document(id).is_some(),
+                        "node {} of {} names document {id}, which does not exist",
+                        node.id,
+                        graph.id
+                    );
+                }
+                if let Some(name) = &node.api {
+                    assert!(
+                        state.api.find_item(name).is_some(),
+                        "node {} of {} names interface item {name}, which does not exist",
+                        node.id,
+                        graph.id
+                    );
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn tool_api_items_resolve() {
+        let state = AppState::new();
+        for tool in state.tools.entries() {
+            for name in tool.api_items {
+                assert!(
+                    state.api.find_item(name).is_some(),
+                    "tool {} names interface item {name}, which does not exist",
+                    tool.id
+                );
+            }
+        }
     }
 }