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const maxNestingLevel = 5;
let expectedNestingLevel = 1;
let timer;
let isInterval = false;
let testStage = "ScriptLoaded";
let stopIncreaseExpectedLevel = false;
let startClampedTimeStamp = 0;
let startRepeatingClamped = false;
let repeatCount = 0;
let maxRepeatTimes = 10;
let timerCallback = async () => {
let now = Date.now();
if (WorkerTestUtils.currentTimerNestingLevel() !== expectedNestingLevel) {
postMessage({
stage: testStage,
status: "FAIL",
msg: `current timer nesting level is ${WorkerTestUtils.currentTimerNestingLevel()}, expected ${expectedNestingLevel}`,
});
if (isInterval) {
clearInterval(timer);
}
return;
}
if (!stopIncreaseExpectedLevel) {
if (expectedNestingLevel === maxNestingLevel) {
stopIncreaseExpectedLevel = true;
startClampedTimeStamp = now;
} else {
expectedNestingLevel = expectedNestingLevel + 1;
}
if (!isInterval) {
setTimeout(timerCallback, 0);
}
return;
}
// This is the first time the timeout is clamped, checking if it is clamped
// to at least 2ms.
if (repeatCount === 0) {
await Promise.resolve(true).then(() => {
if (WorkerTestUtils.currentTimerNestingLevel() !== expectedNestingLevel) {
postMessage({
stage: testStage,
status: "FAIL",
msg: `Timer nesting level should be in effect for immediately resolved micro-tasks`,
});
}
});
if (now - startClampedTimeStamp < 2 ) {
startRepeatingClamped = true;
} else {
postMessage({ stage: testStage, status: "PASS", msg: "" });
}
}
// If the first clamped timeout is less than 2ms, start to repeat the clamped
// timeout for 10 times. Then checking if total clamped time should be at least
// 25ms.
if (startRepeatingClamped) {
if (repeatCount === 10) {
if (now - startClampedTimeStamp < 25) {
postMessage({
stage: testStage,
status: "FAIL",
msg: `total clamped time of repeating ten times should be at least 25ms(${now - startClampedTimeStamp})`,
});
} else {
postMessage({ stage: testStage, status: "PASS", msg: "" });
}
} else {
repeatCount = repeatCount + 1;
if (!isInterval) {
setTimeout(timerCallback, 0);
}
return;
}
}
// reset testing variables
repeatCount = 0;
startRepeatingClamped = false;
stopIncreaseExpectedLevel = false;
if (isInterval) {
clearInterval(timer);
}
};
onmessage = async e => {
testStage = e.data;
switch (e.data) {
case "CheckInitialValue":
if (WorkerTestUtils.currentTimerNestingLevel() === 0) {
postMessage({ stage: testStage, status: "PASS", msg: "" });
} else {
postMessage({
stage: testStage,
status: "FAIL",
msg: `current timer nesting level should be 0(${WorkerTestUtils.currentTimerNestingLevel()}) after top level script loaded.`,
});
}
break;
case "TestSetInterval":
expectedNestingLevel = 1;
isInterval = true;
timer = setInterval(timerCallback, 0);
break;
case "TestSetTimeout":
expectedNestingLevel = 1;
isInterval = false;
setTimeout(timerCallback, 0);
break;
case "CheckNoTimer":
if (WorkerTestUtils.currentTimerNestingLevel() === 0) {
postMessage({ stage: testStage, status: "PASS", msg: "" });
} else {
postMessage({
stage: testStage,
status: "FAIL",
msg: `current timer nesting level should be 0(${WorkerTestUtils.currentTimerNestingLevel()}) when there is no timer in queue.`,
});
}
break;
}
};
postMessage({ stage: testStage, status: "PASS" });
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