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// Temporary implementation of add_task for mochitest-plain until bug 1078657 is
// implemented.
SimpleTest.waitForExplicitFinish();
(function(scope) {
var pendingTasks = [];
var pendingPromise = null;
// Strict spawn function that takes a known generatorFunc and assumes that
// every yielded value will be a Promise. If nesting is desired, then yield*
// should be used!
function spawn(generatorFunc) {
return new Promise(function(resolve, reject) {
try {
var iterator = generatorFunc();
}
catch (ex) {
ok(false, 'Problem invoking generator func: ' + ex + ': ' + ex.stack);
return;
}
var stepResolved = function(result) {
try {
var iterStep = iterator.next(result);
}
catch (ex) {
ok(false, 'Problem invoking iterator step: ' + ex + ': ' + ex.stack);
return;
}
if (iterStep.done) {
resolve(iterStep.value);
return;
}
if (!iterStep.value || !iterStep.value.then) {
ok(false, 'Iterator step returned non-Promise: ' + iterStep.value);
}
iterStep.value.then(stepResolved, generalErrback);
};
stepResolved();
});
}
function maybeSpawn(promiseOrGenerator) {
if (promiseOrGenerator.then) {
return promiseOrGenerator;
}
return spawn(promiseOrGenerator);
}
scope.add_task = function(thing) {
pendingTasks.push(thing);
};
function generalErrback(ex) {
ok(false,
'A rejection happened: ' +
(ex ? (ex + ': ' + ex.stack) : ''));
}
function runNextTask() {
if (pendingTasks.length) {
pendingPromise = maybeSpawn(pendingTasks.shift());
pendingPromise.then(runNextTask, generalErrback);
} else {
SimpleTest.finish();
}
}
// Trigger runNextTask after we think all JS files have been loaded.
// The primary goal is that we can call SimpleTest.finish() after all test
// code has been loaded and run. We gate this based on the document's
// readyState.
var running = false;
function maybeStartRunning() {
if (!running && document.readyState === 'complete') {
running = true;
document.removeEventListener('readystateChange', maybeStartRunning);
// Defer to a subsequent turn of the event loop to let micro-tasks and any
// other clever setTimeout(0) instances run first.
window.setTimeout(runNextTask, 0);
}
}
document.addEventListener('readystatechange', maybeStartRunning);
maybeStartRunning();
})(this);
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