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/**
* Create a new promise that resolves when the window receives
* the MessagePort and starts it.
*
* @param {Window} window - The window to wait for the MessagePort.
* @returns {Promise<MessagePort>} A promise you should await to ensure the
* window
* receives the MessagePort.
*/
function expectMessagePortFromWindow(window) {
return new Promise(resolve => {
window.onmessage = e => {
try {
assert_true(e.ports[0] instanceof window.MessagePort);
e.ports[0].start();
resolve(e.ports[0]);
} catch (e) {
reject(e);
}
};
});
}
/**
* Create a new promise that resolves when the window receives
* the MessagePort and does not start it.
*
* @param {Window} window - The window to wait for the MessagePort.
* @returns {Promise<MessagePort>} A promise you should await to ensure the
* window
* receives the MessagePort.
*/
function expectMessagePortFromWindowWithoutStartingIt(window) {
return new Promise(resolve => {
window.onmessage = e => {
try {
assert_true(e.ports[0] instanceof window.MessagePort);
resolve(e.ports[0]);
} catch (e) {
reject(e);
}
};
});
}
/**
* Create a new MessageChannel and transfers one of the ports to
* the window which opened the window with a remote context provided
* as an argument, and immediately closes the entangled port.
*
* @param {RemoteContextWrapper} remoteContextWrapper
*/
async function createMessageChannelAndSendPortFollowedByClose(remoteContextWrapper) {
await remoteContextWrapper.executeScript(() => {
const {port1, port2} = new MessageChannel();
port1.start();
window.opener.postMessage({}, '*', [port2]);
port1.close();
});
}
/**
* Create a new MessageChannel and transfers one of the ports to
* the window which opened the window with a remote context provided
* as an argument.
*
* @param {RemoteContextWrapper} remoteContextWrapper
*/
async function createMessageChannelAndSendPort(remoteContextWrapper) {
await remoteContextWrapper.executeScript(() => {
const {port1, port2} = new MessageChannel();
port1.start();
window.opener.postMessage({}, '*', [port2]);
window.closePort = () => {
port1.close();
}
});
}
/**
* Creates a window with a remote context.
*
* @returns {Promise<RemoteContextWrapper>}
*/
async function addWindow() {
const helper = new RemoteContextHelper();
return helper.addWindow();
}
/**
* Creates a new promise that resolves when the close event is fired.
*
* @param {MessagePort} port - MessagePort on which the close event will
* be fired.
* @returns {Promise} A promise you should await to ensure the close event
* is dispatched.
*/
function createCloseEventPromise(port) {
return new Promise(resolve => port.onclose = resolve);
}
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