Brace/add missing neo4j test

langchain/src/graphs/tests/neo4j_graph.int.test.ts

@@ -0,0 +1,56 @@
+/* eslint-disable no-process-env */
+
+import { test } from "@jest/globals";
+import { Neo4jGraph } from "../neo4j_graph.js";
+
+describe.skip("Neo4j Graph Tests", () => {
+  const url = process.env.NEO4J_URI as string;
+  const username = process.env.NEO4J_USERNAME as string;
+  const password = process.env.NEO4J_PASSWORD as string;
+  let graph: Neo4jGraph;
+
+  beforeEach(async () => {
+    graph = await Neo4jGraph.initialize({ url, username, password });
+  });
+  afterEach(async () => {
+    await graph.close();
+  });
+
+  test("Schema generation works correctly", async () => {
+    expect(url).toBeDefined();
+    expect(username).toBeDefined();
+    expect(password).toBeDefined();
+
+    // Clear the database
+    await graph.query("MATCH (n) DETACH DELETE n");
+
+    await graph.query(
+      "CREATE (a:Actor {name:'Bruce Willis'})" +
+        "-[:ACTED_IN {roles: ['Butch Coolidge']}]->(:Movie {title: 'Pulp Fiction'})"
+    );
+
+    await graph.refreshSchema();
+    console.log(graph.getSchema());
+
+    // expect(graph.getSchema()).toMatchInlineSnapshot(`
+    //   "Node properties are the following:
+    //   Actor {name: STRING}, Movie {title: STRING}
+    //   Relationship properties are the following:
+    //   ACTED_IN {roles: LIST}
+    //   The relationships are the following:
+    //   (:Actor)-[:ACTED_IN]->(:Movie)"
+    // `);
+  });
+
+  test("Test that Neo4j database is correctly instantiated and connected", async () => {
+    expect(url).toBeDefined();
+    expect(username).toBeDefined();
+    expect(password).toBeDefined();
+
+    // Integers are casted to strings in the output
+    const expectedOutput = [{ output: { str: "test", int: "1" } }];
+    const res = await graph.query('RETURN {str: "test", int: 1} AS output');
+    await graph.close();
+    expect(res).toEqual(expectedOutput);
+  });
+});