test.js

describe('EJSON', function () {
  'use strict';

  var assume = require('assume')
    , EJSON = require('./');

  it('has the `_canonicalStringify` method', function () {
    assume(EJSON._canonicalStringify).to.be.a('function');
  });

  it('is keyOrderSensitive', function () {
    assume(EJSON.equals({
      a: {b: 1, c: 2},
      d: {e: 3, f: 4}
    }, {
      d: {f: 4, e: 3},
      a: {c: 2, b: 1}
    })).to.equal(true);

    assume(EJSON.equals({
      a: {b: 1, c: 2},
      d: {e: 3, f: 4}
    }, {
      a: {c: 2, b: 1},
      d: {f: 4, e: 3}
    }, { keyOrderSensitive: true })).to.equal(false);

    assume(EJSON.equals({
      a: {}
    }, {
      a: {b: 2}
    }, { keyOrderSensitive: true })).to.equal(false);

    assume(EJSON.equals({
      a: {b: 2}
    }, {
      a: {}
    }, { keyOrderSensitive: true })).to.equal(false);
  });

  it('supports nesting and literal', function () {
    var d = new Date()
      , obj = {$date: d};

    var eObj = EJSON.toJSONValue(obj)
      , roundTrip = EJSON.fromJSONValue(eObj);

    assume(obj).to.deep.equal(roundTrip);
  });

  it('equals correctly', function () {
    assume(EJSON.equals({a: 1, b: 2, c: 3}, {a: 1, c: 3, b: 2})).to.equal(true);
    assume(EJSON.equals({a: 1, b: 2}, {a: 1, c: 3, b: 2})).to.equal(false);
    assume(EJSON.equals({a: 1, b: 2, c: 3}, {a: 1, b: 2})).to.equal(false);
    assume(EJSON.equals({a: 1, b: 2, c: 3}, {a: 1, c: 3, b: 4})).to.equal(false);
    assume(EJSON.equals({a: {}}, {a: {b:2}})).to.equal(false);
    assume(EJSON.equals({a: {b:2}}, {a: {}})).to.equal(false);
  });

  it('equality and falsiness', function () {
    assume(EJSON.equals(null, null)).to.equal(true);
    assume(EJSON.equals(undefined, undefined)).to.equal(true);
    assume(EJSON.equals({foo: 'foo'}, null)).to.equal(false);
    assume(EJSON.equals(null, {foo: 'foo'})).to.equal(false);
    assume(EJSON.equals(undefined, {foo: 'foo'})).to.equal(false);
    assume(EJSON.equals({foo: 'foo'}, undefined)).to.equal(false);
  });

  it('clones', function () {
    function cloneTest(x, identical) {
      var y = EJSON.clone(x);

      assume(y).to.deep.equal(x);
      assume(x === y).to.equal(!!identical);
    }

    cloneTest(null, true);
    cloneTest(undefined, true);
    cloneTest(42, true);
    cloneTest('asdf', true);
    cloneTest([1, 2, 3]);
    cloneTest([1, 'fasdf', {foo: 42}]);
    cloneTest({x: 42, y: 'asdf'});

    function testCloneArgs(/*arguments*/) {
      var clonedArgs = EJSON.clone(arguments);
      assume(clonedArgs).to.deep.equal([1, 2, 'foo', [4]]);
    }

    testCloneArgs(1, 2, 'foo', [4]);
  });
});