test: fix keepalive assert check (#535)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced a new endpoint `/digestAuth2` for enhanced security through
Digest Authentication.
  
- **Bug Fixes**
- Improved error handling in tests to prevent runtime errors related to
missing dispatcher pool stats.

- **Tests**
- Added a test case to verify server response for invalid username and
password in digest authentication.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

test/fixtures/server.ts

@@ -100,6 +100,27 @@ export async function startServer(options?: {
       }));
     }
 
+    if (pathname === '/digestAuth2') {
+      const authorization = req.headers.authorization;
+      if (!authorization) {
+        res.setHeader('x-www-authenticate', 'Digest realm="testrealm@urllib.com", qop="auth,auth-int", nonce="dcd98b7102dd2f0e8b11d0f600bfb0c093", opaque="5ccc069c403ebaf9f0171e9517f40e41"');
+        res.statusCode = 401;
+        return res.end(JSON.stringify({
+          error: 'authorization required',
+        }));
+      }
+      if (!authorization.includes('Digest username="user"')) {
+        res.setHeader('x-www-authenticate', 'Digest realm="testrealm@urllib.com", qop="auth,auth-int", nonce="dcd98b7102dd2f0e8b11d0f600bfb0c093", opaque="5ccc069c403ebaf9f0171e9517f40e41"');
+        res.statusCode = 401;
+        return res.end(JSON.stringify({
+          error: 'authorization invaild',
+        }));
+      }
+      return res.end(JSON.stringify({
+        authorization,
+      }));
+    }
+
     if (pathname === '/digestAuth/multi') {
       const authorization = req.headers.authorization;
       if (!authorization) {

test/keep-alive-header.test.ts

@@ -42,9 +42,11 @@ describe('keep-alive-header.test.ts', () => {
         }
         let response = await task;
         // console.log('after response stats: %o', httpClient.getDispatcherPoolStats());
-        assert.equal(httpClient.getDispatcherPoolStats()[origin].pending, 0);
-        // assert.equal(httpClient.getDispatcherPoolStats()[origin].connected, 1);
-        assert.equal(httpClient.getDispatcherPoolStats()[origin].connected, 0);
+        if (httpClient.getDispatcherPoolStats()[origin]) {
+          assert.equal(httpClient.getDispatcherPoolStats()[origin].pending, 0);
+          // assert.equal(httpClient.getDispatcherPoolStats()[origin].connected, 1);
+          assert.equal(httpClient.getDispatcherPoolStats()[origin].connected, 0);
+        }
         // console.log(response.res.socket);
         assert.equal(response.status, 200);
         // console.log(response.headers);
@@ -134,9 +136,11 @@ describe('keep-alive-header.test.ts', () => {
         // console.log('before sleep stats: %o', httpClient.getDispatcherPoolStats());
         // { connected: 2, free: 1, pending: 0, queued: 0, running: 0, size: 0 }
         // assert.equal(httpClient.getDispatcherPoolStats()[origin].connected, 2);
-        assert.equal(httpClient.getDispatcherPoolStats()[origin].connected, 0);
-        // assert.equal(httpClient.getDispatcherPoolStats()[origin].free, 1);
-        assert.equal(httpClient.getDispatcherPoolStats()[origin].free, 0);
+        if (httpClient.getDispatcherPoolStats()[origin]) {
+          assert.equal(httpClient.getDispatcherPoolStats()[origin].connected, 0);
+          // assert.equal(httpClient.getDispatcherPoolStats()[origin].free, 1);
+          assert.equal(httpClient.getDispatcherPoolStats()[origin].free, 0);
+        }
         await sleep(keepAliveTimeout);
         // console.log('after sleep stats: %o', httpClient.getDispatcherPoolStats());
         // clients maybe all gone => after sleep stats: {}

test/options.digestAuth.test.ts

@@ -51,6 +51,17 @@ describe('options.digestAuth.test.ts', () => {
     });
   });
 
+  it('should auth fail on x-www-authenticate', async () => {
+    const response = await urllib.request(`${_url}digestAuth2`, {
+      digestAuth: 'invailduser:pwd',
+      dataType: 'json',
+    });
+    assert.equal(response.status, 401);
+    assert.deepEqual(response.data, {
+      error: 'authorization invaild',
+    });
+  });
+
   it('should digest auth required', async () => {
     const response = await urllib.request(`${_url}digestAuth?t=123123`, {
       dataType: 'json',