goinstant / assert

node and browser (IE8+) compatible assertion library

Assert

A last-resort, legacy browser and node compatible, assert library.

Implements all of Chai.js Assert functions except for .deepProperty and the deepProperty-related functions.

assert.throws has been renamed to assert.exception and assert.noException.

assert.ifError is included as an alias of notOk for expressively testing for the non-presence of errors.

assert's Issues

Custom message is omitted by fancyFail

If you specify a custom error message it will only be used in legacy browsers. The AssertionError type doesn't include it.

exports is not defined when running instanceOf in browser

ReferenceError: exports is not defined
    at formatValue (http://localhost:5050/node_modules/goinstant-assert/index.js:502:25)
    at inspect (http://localhost:5050/node_modules/goinstant-assert/index.js:465:10)
    at objectDisplay (http://localhost:5050/node_modules/goinstant-assert/index.js:437:13)
    at new AssertionError (http://localhost:5050/node_modules/goinstant-assert/index.js:21:32)
    at fancyFail (http://localhost:5050/node_modules/goinstant-assert/index.js:72:9)
    at Function.assert.instanceOf (http://localhost:5050/node_modules/goinstant-assert/index.js:250:5)

function formatValue(ctx, value, recurseTimes) {
  // Provide a hook for user-specified inspect functions.
  // Check that value is an object with an inspect function on it
  if (value && typeof value.inspect === 'function' &&
      // Filter out the util module, it's inspect function is special
      value.inspect !== exports.inspect &&
      // Also filter out any prototype objects using the circular check.
      !(value.constructor && value.constructor.prototype === value)) {
    var ret = value.inspect(recurseTimes);
    if (typeof ret !== 'string') {
      ret = formatValue(ctx, ret, recurseTimes);
    }
    return ret;
  }

Update lodash

Lodash is pretty out of date. There are optimizations and bug fixes that assert is missing.