add standard test for openai formatted tools

libs/langchain-community/src/chat_models/tests/chattogetherai.standard.test.ts

@@ -11,8 +11,8 @@ class ChatTogetherAIStandardUnitTests extends ChatModelUnitTests<
   constructor() {
     super({
       Cls: ChatTogetherAI,
-      chatModelHasToolCalling: false,
-      chatModelHasStructuredOutput: false,
+      chatModelHasToolCalling: true,
+      chatModelHasStructuredOutput: true,
       constructorArgs: {},
     });
     process.env.TOGETHER_AI_API_KEY = "test";

libs/langchain-standard-tests/package.json

@@ -34,7 +34,8 @@
   "dependencies": {
     "@jest/globals": "^29.5.0",
     "@langchain/core": "workspace:*",
-    "zod": "^3.22.4"
+    "zod": "^3.22.4",
+    "zod-to-json-schema": "^3.23.0"
   },
   "devDependencies": {
     "@langchain/scripts": "workspace:*",

libs/langchain-standard-tests/src/integration_tests/chat_models.ts

@@ -15,6 +15,7 @@ import {
   BaseChatModelsTestsFields,
   RecordStringAny,
 } from "../base.js";
+import { zodToJsonSchema } from "zod-to-json-schema";
 
 const adderSchema = /* #__PURE__ */ z
   .object({
@@ -385,6 +386,37 @@ export abstract class ChatModelIntegrationTests<
     expect([1, 2].includes(resultStringContent.parsed.b)).toBeTruthy();
   }
 
+  async testBindToolsWithOpenAIFormattedTools() {
+    if (!this.chatModelHasToolCalling) {
+      console.log("Test requires tool calling. Skipping...");
+      return;
+    }
+
+    const model = new this.Cls(this.constructorArgs);
+    if (!model.bindTools) {
+      throw new Error(
+        "bindTools undefined. Cannot test OpenAI formatted tool calls."
+      );
+    }
+    const modelWithTools = model.bindTools([{
+      type: "function",
+      function: {
+        name: "math_addition",
+        description: adderSchema.description,
+        parameters: zodToJsonSchema(adderSchema)
+      }
+    }]);
+
+    const result: AIMessage = await modelWithTools.invoke("What is 1 + 2");
+    expect(result).toBeInstanceOf(AIMessage);
+    expect(result.tool_calls).toHaveLength(1);
+    if (!result.tool_calls) {
+      throw new Error("result.tool_calls is undefined");
+    }
+    const { tool_calls } = result;
+    expect(tool_calls[0].name).toBe("math_addition");
+  }
+
   /**
    * Run all unit tests for the chat model.
    * Each test is wrapped in a try/catch block to prevent the entire test suite from failing.
@@ -471,6 +503,13 @@ export abstract class ChatModelIntegrationTests<
       console.error("testWithStructuredOutputIncludeRaw failed", e);
     }
 
+    try {
+      await this.testBindToolsWithOpenAIFormattedTools();
+    } catch (e: any) {
+      allTestsPassed = false;
+      console.error("testBindToolsWithOpenAIFormattedTools failed", e);
+    }
+
     return allTestsPassed;
   }
 }

yarn.lock

@@ -10258,6 +10258,7 @@ __metadata:
     ts-jest: ^29.1.0
     typescript: ^5.4.5
     zod: ^3.22.4
+    zod-to-json-schema: ^3.23.0
   languageName: unknown
   linkType: soft
 
@@ -38392,6 +38393,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"zod-to-json-schema@npm:^3.23.0":
+  version: 3.23.0
+  resolution: "zod-to-json-schema@npm:3.23.0"
+  peerDependencies:
+    zod: ^3.23.3
+  checksum: 56f220f06687b41602478cf19f9fbf04488a450c0e47e6cd6c1dc3b6729e2b1c75f742a52a16cbb11bcdf1ff7b2bf2043dfff59f3784d6ac8ecfa562ce035e21
+  languageName: node
+  linkType: hard
+
 "zod@npm:^3.22.3, zod@npm:^3.22.4":
   version: 3.22.4
   resolution: "zod@npm:3.22.4"