test: fix flaky http(s)-set-server-timeout tests

The tests include a callback that might not be invoked but is wrapped in
common.mustCall(). Remove the common.mustCall() wrapper and add a
comment explaining that it should not be added.

Add a new test case that sets the timeout to 1ms and waits for both the
connection handler and the timeout handler to be invoked. This version
keeps the common.mustCall() wrapper intact around the connection handler
(although it's mostly semantic and not necessary for the test as the
test will certainly fail or time out if that handler isn't invoked).

PR-URL: #14380
Fixes: #11768
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: Trott

test/parallel/test-http-set-timeout-server.js

@@ -42,10 +42,7 @@ function run() {
 }
 
 test(function serverTimeout(cb) {
-  const server = http.createServer((req, res) => {
-    // Do nothing. We should get a timeout event.
-    // Might not be invoked. Do not wrap in common.mustCall().
-  });
+  const server = http.createServer();
   server.listen(common.mustCall(() => {
     const s = server.setTimeout(50, common.mustCall((socket) => {
       socket.destroy();
@@ -125,11 +122,14 @@ test(function serverResponseTimeoutWithPipeline(cb) {
   const server = http.createServer((req, res) => {
     if (req.url === '/2')
       secReceived = true;
+    if (req.url === '/1') {
+      res.end();
+      return;
+    }
     const s = res.setTimeout(50, () => {
       caughtTimeout += req.url;
     });
     assert.ok(s instanceof http.OutgoingMessage);
-    if (req.url === '/1') res.end();
   });
   server.on('timeout', common.mustCall((socket) => {
     if (secReceived) {
@@ -152,17 +152,56 @@ test(function serverResponseTimeoutWithPipeline(cb) {
 });
 
 test(function idleTimeout(cb) {
-  const server = http.createServer(common.mustCall((req, res) => {
-    req.on('timeout', common.mustNotCall());
-    res.on('timeout', common.mustNotCall());
-    res.end();
-  }));
+  // Test that the an idle connection invokes the timeout callback.
+  const server = http.createServer();
   const s = server.setTimeout(50, common.mustCall((socket) => {
     socket.destroy();
     server.close();
     cb();
   }));
   assert.ok(s instanceof http.Server);
+  server.listen(common.mustCall(() => {
+    const options = {
+      port: server.address().port,
+      allowHalfOpen: true,
+    };
+    const c = net.connect(options, () => {
+      // ECONNRESET could happen on a heavily-loaded server.
+      c.on('error', (e) => {
+        if (e.message !== 'read ECONNRESET')
+          throw e;
+      });
+      c.write('GET /1 HTTP/1.1\r\nHost: localhost\r\n\r\n');
+      // Keep-Alive
+    });
+  }));
+});
+
+test(function fastTimeout(cb) {
+  let connectionHandlerInvoked = false;
+  let timeoutHandlerInvoked = false;
+  let connectionSocket;
+
+  function invokeCallbackIfDone() {
+    if (connectionHandlerInvoked && timeoutHandlerInvoked) {
+      connectionSocket.destroy();
+      server.close();
+      cb();
+    }
+  }
+
+  const server = http.createServer(common.mustCall((req, res) => {
+    req.on('timeout', common.mustNotCall());
+    res.end();
+    connectionHandlerInvoked = true;
+    invokeCallbackIfDone();
+  }));
+  const s = server.setTimeout(1, common.mustCall((socket) => {
+    connectionSocket = socket;
+    timeoutHandlerInvoked = true;
+    invokeCallbackIfDone();
+  }));
+  assert.ok(s instanceof http.Server);
   server.listen(common.mustCall(() => {
     const options = {
       port: server.address().port,

test/parallel/test-https-set-timeout-server.js

@@ -52,12 +52,7 @@ function run() {
 }
 
 test(function serverTimeout(cb) {
-  const server = https.createServer(
-    serverOptions,
-    (req, res) => {
-      // Do nothing. We should get a timeout event.
-      // Might not be invoked. Do not wrap in common.mustCall().
-    });
+  const server = https.createServer(serverOptions);
   server.listen(common.mustCall(() => {
     const s = server.setTimeout(50, common.mustCall((socket) => {
       socket.destroy();
@@ -147,11 +142,14 @@ test(function serverResponseTimeoutWithPipeline(cb) {
   const server = https.createServer(serverOptions, (req, res) => {
     if (req.url === '/2')
       secReceived = true;
+    if (req.url === '/1') {
+      res.end();
+      return;
+    }
     const s = res.setTimeout(50, () => {
       caughtTimeout += req.url;
     });
     assert.ok(s instanceof http.OutgoingMessage);
-    if (req.url === '/1') res.end();
   });
   server.on('timeout', common.mustCall((socket) => {
     if (secReceived) {
@@ -175,19 +173,60 @@ test(function serverResponseTimeoutWithPipeline(cb) {
 });
 
 test(function idleTimeout(cb) {
-  const server = https.createServer(
-    serverOptions,
-    common.mustCall((req, res) => {
-      req.on('timeout', common.mustNotCall());
-      res.on('timeout', common.mustNotCall());
-      res.end();
-    }));
+  // Test that the an idle connection invokes the timeout callback.
+  const server = https.createServer(serverOptions);
   const s = server.setTimeout(50, common.mustCall((socket) => {
     socket.destroy();
     server.close();
     cb();
   }));
   assert.ok(s instanceof https.Server);
+  server.listen(common.mustCall(() => {
+    const options = {
+      port: server.address().port,
+      allowHalfOpen: true,
+      rejectUnauthorized: false
+    };
+    const c = tls.connect(options, () => {
+      // ECONNRESET could happen on a heavily-loaded server.
+      c.on('error', (e) => {
+        if (e.message !== 'read ECONNRESET')
+          throw e;
+      });
+      c.write('GET /1 HTTP/1.1\r\nHost: localhost\r\n\r\n');
+      // Keep-Alive
+    });
+  }));
+});
+
+test(function fastTimeout(cb) {
+  // Test that the socket timeout fires but no timeout fires for the request.
+  let connectionHandlerInvoked = false;
+  let timeoutHandlerInvoked = false;
+  let connectionSocket;
+
+  function invokeCallbackIfDone() {
+    if (connectionHandlerInvoked && timeoutHandlerInvoked) {
+      connectionSocket.destroy();
+      server.close();
+      cb();
+    }
+  }
+
+  const server = https.createServer(serverOptions, common.mustCall(
+    (req, res) => {
+      req.on('timeout', common.mustNotCall());
+      res.end();
+      connectionHandlerInvoked = true;
+      invokeCallbackIfDone();
+    }
+  ));
+  const s = server.setTimeout(1, common.mustCall((socket) => {
+    connectionSocket = socket;
+    timeoutHandlerInvoked = true;
+    invokeCallbackIfDone();
+  }));
+  assert.ok(s instanceof https.Server);
   server.listen(common.mustCall(() => {
     const options = {
       port: server.address().port,