[inspector] Support multiple sessions per context group

test/inspector/sessions/create-session.js

Index: test/inspector/sessions/create-session.js
diff --git a/test/inspector/sessions/create-session.js b/test/inspector/sessions/create-session.js
new file mode 100644
index 0000000000000000000000000000000000000000..11635838452e3b054c2cbc89df97f22ff7fdaac7
--- /dev/null
+++ b/test/inspector/sessions/create-session.js
@@ -0,0 +1,58 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+InspectorTest.log('Tests that creating multiple sessions works.');
+
+function connect(contextGroup, num) {
+  var session = contextGroup.connect();
+  var executionContextId;
+  session.Protocol.Runtime.onExecutionContextCreated(message => {
+    InspectorTest.log('From session ' + num);
+    InspectorTest.logMessage(message);
+    executionContextId = message.params.context.id;
+  });
+  session.Protocol.Runtime.onExecutionContextDestroyed(message => {
+    InspectorTest.log('From session ' + num);
+    InspectorTest.logMessage(message);
+    InspectorTest.log('id matching: ' + (message.params.executionContextId === executionContextId));
+  });
+  return session;
+}
+
+(async function test() {
+  var contextGroup = new InspectorTest.ContextGroup();
+  InspectorTest.log('Connecting session 1');
+  var session1 = connect(contextGroup, 1);
+  await session1.Protocol.Runtime.enable();
+
+  InspectorTest.log('Connecting session 2');
+  var session2 = connect(contextGroup, 2);
+  await session2.Protocol.Runtime.enable();
+
+  InspectorTest.log('Reconnecting session 2');
+  session2.reconnect();
+  await session2.Protocol.Runtime.enable();
+
+  InspectorTest.log('Reconnecting session 1');
+  session1.reconnect();
+  await session1.Protocol.Runtime.enable();
+
+  InspectorTest.log('Connecting session 3');
+  var session3 = connect(contextGroup, 3);
+  await session3.Protocol.Runtime.enable();
+
+  InspectorTest.log('Destroying and creating context');
+  await session2.Protocol.Runtime.evaluate({expression: 'inspector.fireContextDestroyed(); inspector.fireContextCreated(); '});
+
+  InspectorTest.log('Disconnecting all sessions');
+  session1.disconnect();
+  session2.disconnect();
+  session3.disconnect();
+
+  InspectorTest.log('Connecting session 4');
+  var session4 = connect(contextGroup, 4);
+  await session4.Protocol.Runtime.enable();
+
+  InspectorTest.completeTest();
+})();