Test for ChildProcess.disconnect()

test/simple/test-child-process-disconnect.js

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+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var assert = require('assert');
+var common = require('../common');
+var fork = require('child_process').fork;
+var net = require('net');
+
+// child
+if (process.argv[2] === 'child') {
+
+  var server = net.createServer();
+
+  server.on('connection', function (socket) {
+
+    process.on('disconnect', function () {
+      socket.end((process.connected).toString());
+    });
+
+    // when the socket is closed, we will close the server
+    // allowing the process to self terminate
+    socket.on('end', function () {
+      server.close();
+    });
+
+    socket.write('ready');
+  });
+
+  // when the server is ready tell parent
+  server.on('listening', function () {
+    process.send('ready');
+  });
+
+  server.listen(common.PORT);
+
+} else {
+  // testcase
+  var child = fork(process.argv[1], ['child']);
+
+  var childFlag = false;
+  var childSelfTerminate = false;
+  var parentEmit = false;
+  var parentFlag = false;
+
+  // when calling .disconnect the event should emit
+  // and the disconnected flag should be true.
+  child.on('disconnect', function () {
+    parentEmit = true;
+    parentFlag = child.connected;
+  });
+
+  // the process should also self terminate without using signals
+  child.on('exit', function () {
+    childSelfTerminate = true;
+  });
+
+  // when child is listning
+  child.on('message', function (msg) {
+    if (msg === 'ready') {
+
+      // connect to child using TCP to know if disconnect was emitted
+      var socket = net.connect(common.PORT);
+
+      socket.on('data', function (data) {
+        data = data.toString();
+
+        // ready to be disconnected
+        if (data === 'ready') {
+          child.disconnect();
+          return;
+        }
+
+        // disconnect is emitted
+        childFlag = (data === 'true');
+      });
+
+    }
+  });
+
+  process.on('exit', function () {
+    assert.equal(childFlag, false);
+    assert.equal(parentFlag, false);
+
+    assert.ok(childSelfTerminate);
+    assert.ok(parentEmit);
+  });
+}