atcheck/lsscanner/new_ubuntu/node_modules_win/utf8-byte-length/test.js

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2019-12-16 18:42:21 +01:00
"use strict";
var test = require("tape");
var getLength = require("./index");
var browserGetLength = require("./browser");
function repeat(string, times) {
return new Array(times + 1).join(string);
}
// Test writing files to the fs
//
try {
var blns = require("./vendor/big-list-of-naughty-strings/blns.json");
}
catch (err) {
console.error("Error: Cannot load file './vendor/big-list-of-naughty-strings/blns.json'");
console.error();
console.error("Make sure you've initialized git submodules by running");
console.error();
console.error(" git submodule update --init");
console.error();
process.exit(1);
}
// 8-byte, 4-character string
var THUMB = "👍🏽";
// Tests run against both implementations
[getLength, browserGetLength].forEach(function(getLength) {
// Strings with known lengths
[
["", 0],
["a", 1],
["☃", 3],
["a☃", 4],
[repeat("a", 250) + '\uD800\uDC00', 254],
[repeat("a", 251) + '\uD800\uDC00', 255],
[repeat("a", 252) + '\uD800\uDC00', 256],
[THUMB, 8],
[THUMB[0], 3],
[THUMB[1], 3],
[THUMB[2], 3],
[THUMB[3], 3],
[THUMB.slice(0, 2), 4],
[THUMB.slice(2, 4), 4],
[THUMB.slice(1, 3), 6],
].forEach(function(desc) {
var string = desc[0];
var length = desc[1];
test(JSON.stringify(string) + "=" + length, function(t) {
t.equal(getLength(string), length);
t.end();
});
});
// Make sure result matches Buffer.byteLength for various strings
blns.forEach(function(str) {
test(JSON.stringify(str), function(t) {
t.equal(getLength(str), Buffer.byteLength(str));
t.end();
});
});
});