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fix(Connection): do not assert that methods always have callbacks. (#2330)

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In certain cases, all callbacks could be rejected before we get a
response from transport. This is easily reproducible with `slowMo`
option.

Fixes #563.
This commit is contained in:
Andrey Lushnikov 2018-04-07 17:59:22 -07:00 committed by GitHub
parent 294f33b75c
commit 57fa690724
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1 changed files with 9 additions and 7 deletions
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6
lib/Connection.js
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@ -102,15 +102,17 @@ class Connection extends EventEmitter {
await new Promise(f => setTimeout(f, this._delay));
debugProtocol('◀ RECV ' + message);
const object = JSON.parse(message);
if (object.id && this._callbacks.has(object.id)) {
if (object.id) {
const callback = this._callbacks.get(object.id);
// Callbacks could be all rejected if someone has called `.dispose()`.
if (callback) {
this._callbacks.delete(object.id);
if (object.error)
callback.reject(rewriteError(callback.error, `Protocol error (${callback.method}): ${object.error.message} ${object.error.data}`));
else
callback.resolve(object.result);
}
} else {
console.assert(!object.id);
if (object.method === 'Target.receivedMessageFromTarget') {
const session = this._sessions.get(object.params.sessionId);
if (session)