test: cover firefox cookie resolution

tests/cookies.test.ts

@@ -6,12 +6,17 @@ vi.mock('node:child_process', () => ({
 }));
 
 // Mock fs to prevent actual file operations
-vi.mock('node:fs', () => ({
-  existsSync: vi.fn(() => false),
-  copyFileSync: vi.fn(),
-  mkdtempSync: vi.fn(() => '/tmp/test-dir'),
-  rmSync: vi.fn(),
-}));
+vi.mock('node:fs', () => {
+  const fs = vi.importActual<typeof import('node:fs')>('node:fs');
+  return {
+    ...fs,
+    existsSync: vi.fn(() => false),
+    copyFileSync: vi.fn(),
+    mkdtempSync: vi.fn(() => '/tmp/test-dir'),
+    readdirSync: vi.fn(() => []),
+    rmSync: vi.fn(),
+  };
+});
 
 describe('cookies', () => {
   const originalEnv = process.env;
@@ -32,6 +37,32 @@ describe('cookies', () => {
   });
 
   describe('resolveCredentials', () => {
+    it('uses firefox when enabled and returns cookies', async () => {
+      const { resolveCredentials } = await import('../src/lib/cookies.js');
+      const fs = await import('node:fs');
+
+      // Firefox present with cookies.sqlite
+      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
+        const lower = path.toLowerCase();
+        if (lower.endsWith('cookies.sqlite')) return true;
+        if (lower.includes('firefox')) return true;
+        return false;
+      });
+      (fs.readdirSync as unknown as vi.Mock).mockReturnValue([{ isDirectory: () => true, name: 'abc.default-release' }]);
+      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
+      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
+
+      // sqlite3 output for firefox
+      const { execSync } = await import('node:child_process');
+      (execSync as unknown as vi.Mock).mockReturnValue('auth_token|firefox_auth\nct0|firefox_ct0');
+
+      const result = await resolveCredentials({ allowFirefox: true, allowChrome: false, firefoxProfile: 'abc.default-release' });
+
+      expect(result.cookies.authToken).toBe('firefox_auth');
+      expect(result.cookies.ct0).toBe('firefox_ct0');
+      expect(result.cookies.source).toContain('Firefox');
+    });
+
     it('should prioritize CLI arguments over env vars', async () => {
       process.env.AUTH_TOKEN = 'env_auth';
       process.env.CT0 = 'env_ct0';
@@ -52,7 +83,7 @@ describe('cookies', () => {
       process.env.CT0 = 'test_ct0';
 
       const { resolveCredentials } = await import('../src/lib/cookies.js');
-      const result = await resolveCredentials({});
+      const result = await resolveCredentials({ allowFirefox: false, allowChrome: false });
 
       expect(result.cookies.authToken).toBe('test_auth_token');
       expect(result.cookies.ct0).toBe('test_ct0');
@@ -64,7 +95,7 @@ describe('cookies', () => {
       process.env.TWITTER_CT0 = 'twitter_ct0';
 
       const { resolveCredentials } = await import('../src/lib/cookies.js');
-      const result = await resolveCredentials({});
+      const result = await resolveCredentials({ allowFirefox: false, allowChrome: false });
 
       expect(result.cookies.authToken).toBe('twitter_auth');
       expect(result.cookies.ct0).toBe('twitter_ct0');
@@ -86,7 +117,7 @@ describe('cookies', () => {
       process.env.CT0 = '';
 
       const { resolveCredentials } = await import('../src/lib/cookies.js');
-      const result = await resolveCredentials({});
+      const result = await resolveCredentials({ allowFirefox: false, allowChrome: false });
 
       expect(result.cookies.authToken).toBeNull();
       expect(result.cookies.ct0).toBeNull();
@@ -95,7 +126,7 @@ describe('cookies', () => {
 
     it('should warn when credentials are missing', async () => {
       const { resolveCredentials } = await import('../src/lib/cookies.js');
-      const result = await resolveCredentials({});
+      const result = await resolveCredentials({ allowFirefox: false, allowChrome: false });
 
       expect(result.warnings).toContain(
         'Missing auth_token - provide via --auth-token, AUTH_TOKEN env var, or login to x.com in Chrome/Firefox',