32 lines
1.1 KiB
JavaScript
32 lines
1.1 KiB
JavaScript
// Decode an URL encoded string, using XHR and data: URL. Returns a Promise.
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function decode(label, url_encoded_string) {
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return new Promise((resolve, reject) => {
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const req = new XMLHttpRequest;
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req.open('GET', `data:text/plain,${url_encoded_string}`);
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req.overrideMimeType(`text/plain; charset="${label}"`);
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req.send();
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req.onload = () => resolve(req.responseText);
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req.onerror = () => reject(new Error(req.statusText));
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});
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}
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// Convert code units in a decoded string into: "U+0001/U+0002/...'
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function to_code_units(string) {
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return string.split('')
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.map(unit => unit.charCodeAt(0))
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.map(code => 'U+' + ('0000' + code.toString(16).toUpperCase()).slice(-4))
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.join('/');
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}
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function decode_test(label,
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url_encoded_input,
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expected_code_units,
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description) {
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promise_test(() => {
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return decode(label, url_encoded_input)
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.then(decoded => to_code_units(decoded))
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.then(actual => {
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assert_equals(actual, expected_code_units, `Decoding with ${label}`);
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});
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}, description);
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}
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