feat: add OpenAI OAuth, strict model overrides, and Gmail pull mode

src/models/openai.oauth.test.ts

@@ -0,0 +1,68 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+
+import { OpenAIClient } from './openai.js';
+
+vi.mock('../auth/openai.js', () => ({
+  ensureValidOpenAIAuth: vi.fn(async () => ({
+    access_token: 'at',
+    refresh_token: 'rt',
+    expires_at: Date.now() + 60_000,
+    created_at: new Date().toISOString(),
+    account_id: 'acct',
+  })),
+}));
+
+function makeSse(events: Array<{ event: string; data: any }>): string {
+  return events
+    .map((e) => `event: ${e.event}\ndata: ${JSON.stringify(e.data)}\n\n`)
+    .join('');
+}
+
+describe('OpenAIClient OAuth (Codex)', () => {
+  const originalFetch = globalThis.fetch;
+
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    globalThis.fetch = originalFetch;
+    vi.useRealTimers();
+    vi.restoreAllMocks();
+  });
+
+  it('streams SSE and accumulates output_text.delta', async () => {
+    const sse = makeSse([
+      { event: 'response.created', data: { type: 'response.created', response: { id: 'r1' } } },
+      { event: 'response.output_text.delta', data: { type: 'response.output_text.delta', delta: 'hel' } },
+      { event: 'response.output_text.delta', data: { type: 'response.output_text.delta', delta: 'lo' } },
+      { event: 'response.completed', data: { type: 'response.completed', response: { usage: { input_tokens: 2, output_tokens: 2 } } } },
+    ]);
+
+    globalThis.fetch = vi.fn(async (_url: any, init?: any) => {
+      const parsed = JSON.parse(init.body);
+      expect(parsed.store).toBe(false);
+      expect(parsed.stream).toBe(true);
+      expect(typeof parsed.instructions).toBe('string');
+      expect(Array.isArray(parsed.input)).toBe(true);
+
+      const stream = new ReadableStream({
+        start(controller) {
+          controller.enqueue(new TextEncoder().encode(sse));
+          controller.close();
+        },
+      });
+
+      return new Response(stream, { status: 200 });
+    }) as any;
+
+    const client = new OpenAIClient({ model: 'gpt-5.3-codex', useOAuth: true });
+    const resp = await client.chat({
+      system: 'You are helpful.',
+      messages: [{ role: 'user', content: 'hi' }],
+    });
+
+    expect(resp.content).toBe('hello');
+    expect(resp.usage).toEqual({ inputTokens: 2, outputTokens: 2 });
+  });
+});