inspector: allow concurrent inspector sessions

This change enables concurrent inspector sessions, through WebSocket
interface as well as JS interface, in any combination.

PR-URL: https://github.com/nodejs/node/pull/20137
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/test/parallel/test-inspector-multisession-js.js b/test/parallel/test-inspector-multisession-js.js
new file mode 100644
index 0000000000..58533f4cd6
--- /dev/null
+++ b/test/parallel/test-inspector-multisession-js.js
@@ -0,0 +1,59 @@
+'use strict';
+const common = require('../common');
+
+common.skipIfInspectorDisabled();
+
+const assert = require('assert');
+const { Session } = require('inspector');
+const path = require('path');
+
+function debugged() {
+  return 42;
+}
+
+async function test() {
+  const session1 = new Session();
+  const session2 = new Session();
+
+  session1.connect();
+  session2.connect();
+
+  let session1Paused = false;
+  let session2Paused = false;
+
+  session1.on('Debugger.paused', () => session1Paused = true);
+  session2.on('Debugger.paused', () => session2Paused = true);
+
+  console.log('Connected');
+
+  session1.post('Debugger.enable');
+  session2.post('Debugger.enable');
+  console.log('Debugger was enabled');
+
+  await new Promise((resolve, reject) => {
+    session1.post('Debugger.setBreakpointByUrl', {
+      'lineNumber': 9,
+      'url': path.resolve(__dirname, __filename),
+      'columnNumber': 0,
+      'condition': ''
+    }, (error, result) => {
+      return error ? reject(error) : resolve(result);
+    });
+  });
+  console.log('Breakpoint was set');
+
+  debugged();
+
+  // Both sessions will receive the paused event
+  assert(session1Paused);
+  assert(session2Paused);
+  console.log('Breakpoint was hit');
+
+  session1.disconnect();
+  session2.disconnect();
+  console.log('Sessions were disconnected');
+}
+
+common.crashOnUnhandledRejection();
+
+test();