[OpenAI] Fix browser tests (#31871)

We need to actually emit built files and to map code under `dist/esm` to
`dist/browser`.

Live run:
https://dev.azure.com/azure-sdk/internal/_build/results?buildId=4360317&view=logs&j=8f098e13-557e-5a76-9331-06424800e0fa&t=52fc44a1-b208-5374-c579-e601a962726b

sdk/openai/openai/tsconfig.browser.config.json

@@ -4,6 +4,7 @@
   "exclude": ["./test/**/node/**/*.ts"],
   "compilerOptions": {
     "outDir": "./dist-test/browser",
-    "composite": true
+    "rootDir": ".",
+    "noEmit": false
   }
 }

sdk/openai/openai/tsconfig.samples.json

@@ -5,7 +5,7 @@
     "module": "NodeNext",
     "moduleResolution": "NodeNext",
     "paths": {
-      "@azure/openai": ["./dist/esm/index.js"]
+      "@azure/openai": ["./dist/esm"]
     },
     "noEmit": true,
     "composite": true

sdk/openai/openai/vitest.browser.config.ts

@@ -4,6 +4,7 @@
 
 import { defineConfig, mergeConfig } from "vitest/config";
 import viteConfig from "../../../vitest.browser.shared.config.ts";
+import { resolve } from "node:path";
 
 export default mergeConfig(
   viteConfig,
@@ -16,6 +17,11 @@ export default mergeConfig(
       include: [
         "dist-test/browser/test/**/*.spec.js",
       ],
+      alias: {
+        "@azure/openai/types": resolve("./dist/browser/types/index.js"),
+        "@azure/openai": resolve("./dist/browser/index.js"),
+        "../../dist/esm": resolve("./dist/browser"),
+      },
     },
   }),
 );