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'use strict';
// These tests rely on the User Agent providing an implementation of the
// FakeSerialService interface which replaces the platform-specific
// implementation of the Web Serial API with one that can be automated from
// Javascript for testing purposes.
//
// In Chromium-based browsers this implementation is provided by a polyfill
// in order to reduce the amount of test-only code shipped to users. To enable
// these tests the browser must be run with these options:
//
// --enable-blink-features=MojoJS,MojoJSTest
let fakeSerialService = undefined;
// Returns a SerialPort instance and associated FakeSerialPort instance.
async function getFakeSerialPort(fake) {
let token = fake.addPort();
let fakePort = fake.getFakePort(token);
let ports = await navigator.serial.getPorts();
assert_equals(ports.length, 1);
let port = ports[0];
assert_true(port instanceof SerialPort);
return { port, fakePort };
}
function serial_test(func, name, properties) {
promise_test(async (test) => {
assert_implements(navigator.serial, 'missing navigator.serial');
if (fakeSerialService === undefined) {
// Try loading a polyfill for the fake serial service.
if (isChromiumBased) {
const fakes = await import('/resources/chromium/fake-serial.js');
fakeSerialService = fakes.fakeSerialService;
}
}
assert_implements(fakeSerialService, 'missing fakeSerialService after initialization');
fakeSerialService.start();
try {
await func(test, fakeSerialService);
} finally {
fakeSerialService.stop();
fakeSerialService.reset();
}
}, name, properties);
}
function trustedClick() {
return new Promise(resolve => {
let button = document.createElement('button');
button.textContent = 'click to continue test';
button.style.display = 'block';
button.style.fontSize = '20px';
button.style.padding = '10px';
button.onclick = () => {
document.body.removeChild(button);
resolve();
};
document.body.appendChild(button);
test_driver.click(button);
});
}
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