node/test/simple/test-byte-length.js

common = require("../common");
assert = common.assert

assert.equal(14, process._byteLength("Il était tué"));
assert.equal(14, process._byteLength("Il était tué", "utf8"));

assert.equal(12, process._byteLength("Il était tué", "ascii"));

assert.equal(12, process._byteLength("Il était tué", "binary"));

assert.throws(function() {
  process._byteLength();
});
assert.throws(function() {
 process._byteLength(5);
});