make-plural-compiler/lib/tests.js

Translates Unicode CLDR pluralization rules to executable JavaScript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.testCat = testCat;
const errorMsg = (lc, n, type, fn, args, msg) => `\
Locale ${lc} ${type} rule self-test failed for ${typeof n} ${n} (${msg})
Function: ${fn.toString()}
Arguments: ${JSON.stringify(args)}`;
function testCond(lc, fn, ordArg, n, type, expResult) {
  const compact = typeof n === 'string' && n.match(/(.*)c(\d+)$/);
  let args = [n];
  if (ordArg) args.push(type === 'ordinal');
  if (compact) {
    const c = Number(compact[2]);
    args[0] = Number(compact[1]) * Math.pow(10, c);
    args.push(c);
  }
  try {
    var r = fn(...args);
  } catch (error) {
    /* istanbul ignore next: should not happen unless CLDR data is broken */
    throw new Error(errorMsg(lc, n, type, fn, args, error));
  }
  if (r !== expResult) {
    const res = JSON.stringify(r);
    const exp = JSON.stringify(expResult);
    throw new Error(errorMsg(lc, n, type, fn, args, `was ${res}, expected ${exp}`));
  }
}
function testCat(lc, fn, ordArg, type, cat, values) {
  for (const n of values) {
    testCond(lc, fn, ordArg, n, type, cat);
    if (!n.includes('c') && !/\.0+$/.test(n)) testCond(lc, fn, ordArg, Number(n), type, cat);
  }
}