http2: add test for client.destroy behavior

PR-URL: nodejs#64
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-http2-client-destroy.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const h2 = require('http2');
+
+const server = h2.createServer();
+server.listen(0);
+
+server.on('listening', common.mustCall(function() {
+  const port = this.address().port;
+
+  const destroyCallbacks = [
+    (client) => client.destroy(),
+    (client) => client.socket.destroy()
+  ];
+
+  let remaining = destroyCallbacks.length;
+
+  destroyCallbacks.forEach((destroyCallback) => {
+    const client = h2.connect(`http://localhost:${port}`);
+    client.on('connect', common.mustCall(() => {
+      const socket = client.socket;
+
+      assert(client.socket, 'client session has associated socket');
+      assert(!client.destroyed,
+             'client has not been destroyed before destroy is called');
+      assert(!socket.destroyed,
+             'socket has not been destroyed before destroy is called');
+
+      // Ensure that 'close' event is emitted
+      client.on('close', common.mustCall(() => {}));
+
+      destroyCallback(client);
+
+      assert(!client.socket, 'client.socket undefined after destroy is called');
+      assert(client.destroyed,
+             'client marked as destroyed after destroy is called');
+      assert(socket.destroyed,
+             'socket marked as destroyed after destroy is called');
+
+      if (--remaining === 0) {
+        server.close();
+      }
+    }));
+  });
+}));