test(ai-vercel-adapter): add simple test

Author: gwardwell

packages/ai-vercel-adapter/config/jest/setup.ts

@@ -0,0 +1,44 @@
+//@ts-ignore
+globalThis.__DEV__ = true;
+
+import { TextDecoder, TextEncoder } from "util";
+import "@testing-library/jest-dom";
+
+global.TextEncoder ??= TextEncoder;
+// @ts-ignore
+global.TextDecoder ??= TextDecoder;
+
+function fail(reason = "fail was called in a test.") {
+  expect(reason).toBe(undefined);
+}
+
+// @ts-ignore
+globalThis.fail = fail;
+
+if (!Symbol.dispose) {
+  Object.defineProperty(Symbol, "dispose", {
+    value: Symbol("dispose"),
+  });
+}
+if (!Symbol.asyncDispose) {
+  Object.defineProperty(Symbol, "asyncDispose", {
+    value: Symbol("asyncDispose"),
+  });
+}
+
+// not available in JSDOM 🙄
+global.structuredClone = (val) => JSON.parse(JSON.stringify(val));
+global.ReadableStream ||= require("stream/web").ReadableStream;
+global.TransformStream ||= require("stream/web").TransformStream;
+
+AbortSignal.timeout = (ms) => {
+  const controller = new AbortController();
+  setTimeout(
+    () =>
+      controller.abort(
+        new DOMException("The operation timed out.", "TimeoutError")
+      ),
+    ms
+  );
+  return controller.signal;
+};

packages/ai-vercel-adapter/jest.config.ts

@@ -3,7 +3,8 @@ import { fileURLToPath } from "node:url";
 
 export default {
   rootDir: "src",
-  preset: "ts-jest",
+  preset: "ts-jest/presets/default-esm",
+  extensionsToTreatAsEsm: [".ts"],
   testEnvironment: fileURLToPath(
     import.meta.resolve("../../config/FixJSDOMEnvironment.js")
   ),
@@ -21,9 +22,16 @@ export default {
       {
         isolatedModules: true,
         tsconfig: join(import.meta.dirname, "tsconfig.json"),
+        useESM: true,
       },
     ],
   },
+  resolver: fileURLToPath(
+    import.meta.resolve("../../src/config/jest/resolver.ts")
+  ),
+  moduleNameMapper: {
+    "^@apollo/client-ai$": join(import.meta.dirname, "../ai/src/index.ts"),
+  },
   transformIgnorePatterns: ["/node_modules/(?!(rxjs)/)"],
   prettierPath: null,
   testMatch: ["**/__tests__/**/*.test.ts", "**/__tests__/**/*.test.tsx"],

packages/ai-vercel-adapter/src/__tests__/VercelAIAdapter.test.ts

@@ -0,0 +1,10 @@
+import { VercelAIAdapter } from "../VercelAIAdapter.js";
+
+describe("VercelAIAdapter", () => {
+  it("should be able to be instantiated", () => {
+    const adapter = new VercelAIAdapter({
+      model: "gpt-4o-mini",
+    });
+    expect(adapter).toBeInstanceOf(VercelAIAdapter);
+  });
+});