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