core/node_modules/util/test/browser/inspect.js

// Copyright Joyent, Inc. and other Node contributors.
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var assert = require('assert');
var util = require('../../');

suite('inspect');

test('util.inspect - test for sparse array', function () {
  var a = ['foo', 'bar', 'baz'];
  assert.equal(util.inspect(a), '[ \'foo\', \'bar\', \'baz\' ]');
  delete a[1];
  assert.equal(util.inspect(a), '[ \'foo\', , \'baz\' ]');
  assert.equal(util.inspect(a, true), '[ \'foo\', , \'baz\', [length]: 3 ]');
  assert.equal(util.inspect(new Array(5)), '[ , , , ,  ]');
});

test('util.inspect -  exceptions should print the error message, not \'{}\'', function () {
  assert.equal(util.inspect(new Error()), '[Error]');
  assert.equal(util.inspect(new Error('FAIL')), '[Error: FAIL]');
  assert.equal(util.inspect(new TypeError('FAIL')), '[TypeError: FAIL]');
  assert.equal(util.inspect(new SyntaxError('FAIL')), '[SyntaxError: FAIL]');
});