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(function() {
var subTestStart = 0;
var subTestEnd = Infinity;
var match;
if (location.search) {
match = /(?:^\?|&)(\d+)-(\d+|last)(?:&|$)/.exec(location.search);
if (match) {
subTestStart = parseInt(match[1], 10);
if (match[2] !== "last") {
subTestEnd = parseInt(match[2], 10);
}
}
// Below is utility code to generate <meta> for copy/paste into tests.
// Sample usage:
// test.html?split=1000
match = /(?:^\?|&)split=(\d+)(?:&|$)/.exec(location.search);
if (match) {
var testsPerVariant = parseInt(match[1], 10);
add_completion_callback(tests => {
var total = tests.length;
var template = '<meta name="variant" content="?%s-%s">';
var metas = [];
for (var i = 1; i < total - testsPerVariant; i = i + testsPerVariant) {
metas.push(template.replace("%s", i).replace("%s", i + testsPerVariant - 1));
}
metas.push(template.replace("%s", i).replace("%s", "last"));
var pre = document.createElement('pre');
pre.textContent = metas.join('\n');
document.body.insertBefore(pre, document.body.firstChild);
document.getSelection().selectAllChildren(pre);
});
}
}
/**
* Check if `currentSubTest` is in the subset specified in the URL.
* @param {number} currentSubTest
* @returns {boolean}
*/
function shouldRunSubTest(currentSubTest) {
return currentSubTest >= subTestStart && currentSubTest <= subTestEnd;
}
var currentSubTest = 0;
/**
* Only test a subset of tests with, e.g., `?1-10` in the URL.
* Can be used together with `<meta name="variant" content="...">`
* Sample usage:
* for (const test of tests) {
* subsetTest(async_test, test.fn, test.name);
* }
*/
function subsetTest(testFunc, ...args) {
currentSubTest++;
if (shouldRunSubTest(currentSubTest)) {
return testFunc(...args);
}
return null;
}
self.shouldRunSubTest = shouldRunSubTest;
self.subsetTest = subsetTest;
})();
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