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b1bbd1e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | "use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.waitFor = waitForWrapper;
var _helpers = require("./helpers");
var _config = require("./config");
// This is so the stack trace the developer sees is one that's
// closer to their code (because async stack traces are hard to follow).
function copyStackTrace(target, source) {
target.stack = source.stack.replace(source.message, target.message);
}
function waitFor(callback, {
container = (0, _helpers.getDocument)(),
timeout = (0, _config.getConfig)().asyncUtilTimeout,
showOriginalStackTrace = (0, _config.getConfig)().showOriginalStackTrace,
stackTraceError,
interval = 50,
onTimeout = error => {
Object.defineProperty(error, 'message', {
value: (0, _config.getConfig)().getElementError(error.message, container).message
});
return error;
},
mutationObserverOptions = {
subtree: true,
childList: true,
attributes: true,
characterData: true
}
}) {
if (typeof callback !== 'function') {
throw new TypeError('Received `callback` arg must be a function');
}
return new Promise(async (resolve, reject) => {
let lastError, intervalId, observer;
let finished = false;
let promiseStatus = 'idle';
const overallTimeoutTimer = setTimeout(handleTimeout, timeout);
const usingJestFakeTimers = (0, _helpers.jestFakeTimersAreEnabled)();
if (usingJestFakeTimers) {
const {
unstable_advanceTimersWrapper: advanceTimersWrapper
} = (0, _config.getConfig)();
checkCallback();
// this is a dangerous rule to disable because it could lead to an
// infinite loop. However, eslint isn't smart enough to know that we're
// setting finished inside `onDone` which will be called when we're done
// waiting or when we've timed out.
// eslint-disable-next-line no-unmodified-loop-condition
while (!finished) {
if (!(0, _helpers.jestFakeTimersAreEnabled)()) {
const error = new Error(`Changed from using fake timers to real timers while using waitFor. This is not allowed and will result in very strange behavior. Please ensure you're awaiting all async things your test is doing before changing to real timers. For more info, please go to https://github.com/testing-library/dom-testing-library/issues/830`);
if (!showOriginalStackTrace) copyStackTrace(error, stackTraceError);
reject(error);
return;
}
// In this rare case, we *need* to wait for in-flight promises
// to resolve before continuing. We don't need to take advantage
// of parallelization so we're fine.
// https://stackoverflow.com/a/59243586/971592
// eslint-disable-next-line no-await-in-loop
await advanceTimersWrapper(async () => {
// we *could* (maybe should?) use `advanceTimersToNextTimer` but it's
// possible that could make this loop go on forever if someone is using
// third party code that's setting up recursive timers so rapidly that
// the user's timer's don't get a chance to resolve. So we'll advance
// by an interval instead. (We have a test for this case).
jest.advanceTimersByTime(interval);
});
// Could have timed-out
if (finished) {
break;
}
// It's really important that checkCallback is run *before* we flush
// in-flight promises. To be honest, I'm not sure why, and I can't quite
// think of a way to reproduce the problem in a test, but I spent
// an entire day banging my head against a wall on this.
checkCallback();
}
} else {
try {
(0, _helpers.checkContainerType)(container);
} catch (e) {
reject(e);
return;
}
intervalId = setInterval(checkRealTimersCallback, interval);
const {
MutationObserver
} = (0, _helpers.getWindowFromNode)(container);
observer = new MutationObserver(checkRealTimersCallback);
observer.observe(container, mutationObserverOptions);
checkCallback();
}
function onDone(error, result) {
finished = true;
clearTimeout(overallTimeoutTimer);
if (!usingJestFakeTimers) {
clearInterval(intervalId);
observer.disconnect();
}
if (error) {
reject(error);
} else {
resolve(result);
}
}
function checkRealTimersCallback() {
if ((0, _helpers.jestFakeTimersAreEnabled)()) {
const error = new Error(`Changed from using real timers to fake timers while using waitFor. This is not allowed and will result in very strange behavior. Please ensure you're awaiting all async things your test is doing before changing to fake timers. For more info, please go to https://github.com/testing-library/dom-testing-library/issues/830`);
if (!showOriginalStackTrace) copyStackTrace(error, stackTraceError);
return reject(error);
} else {
return checkCallback();
}
}
function checkCallback() {
if (promiseStatus === 'pending') return;
try {
const result = (0, _config.runWithExpensiveErrorDiagnosticsDisabled)(callback);
if (typeof result?.then === 'function') {
promiseStatus = 'pending';
result.then(resolvedValue => {
promiseStatus = 'resolved';
onDone(null, resolvedValue);
}, rejectedValue => {
promiseStatus = 'rejected';
lastError = rejectedValue;
});
} else {
onDone(null, result);
}
// If `callback` throws, wait for the next mutation, interval, or timeout.
} catch (error) {
// Save the most recent callback error to reject the promise with it in the event of a timeout
lastError = error;
}
}
function handleTimeout() {
let error;
if (lastError) {
error = lastError;
if (!showOriginalStackTrace && error.name === 'TestingLibraryElementError') {
copyStackTrace(error, stackTraceError);
}
} else {
error = new Error('Timed out in waitFor.');
if (!showOriginalStackTrace) {
copyStackTrace(error, stackTraceError);
}
}
onDone(onTimeout(error), null);
}
});
}
function waitForWrapper(callback, options) {
// create the error here so its stack trace is as close to the
// calling code as possible
const stackTraceError = new Error('STACK_TRACE_MESSAGE');
return (0, _config.getConfig)().asyncWrapper(() => waitFor(callback, {
stackTraceError,
...options
}));
}
/*
eslint
max-lines-per-function: ["error", {"max": 200}],
*/ |