AngularSpec.js

'use strict';

// Lots of typed array globals are used in this file and ESLint is
// not smart enough to understand the `typeof !== 'undefined'` guards.
/* globals Blob, Uint8ClampedArray, Uint16Array, Uint32Array, Int8Array, Int16Array, Int32Array,
Float32Array, Float64Array,  */

describe('angular', function() {
  var element;

  var document = window.document;

  afterEach(function() {
    dealoc(element);
  });

  describe('case', function() {
    it('should change case', function() {
      expect(lowercase('ABC90')).toEqual('abc90');
      expect(manualLowercase('ABC90')).toEqual('abc90');
      expect(uppercase('abc90')).toEqual('ABC90');
      expect(manualUppercase('abc90')).toEqual('ABC90');
    });
  });

  describe('copy', function() {
    it('should return same object', function() {
      var obj = {};
      var arr = [];
      expect(copy({}, obj)).toBe(obj);
      expect(copy([], arr)).toBe(arr);
    });

    it('should preserve prototype chaining', function() {
      var GrandParentProto = {};
      var ParentProto = Object.create(GrandParentProto);
      var obj = Object.create(ParentProto);
      expect(ParentProto.isPrototypeOf(copy(obj))).toBe(true);
      expect(GrandParentProto.isPrototypeOf(copy(obj))).toBe(true);
      var Foo = function() {};
      expect(copy(new Foo()) instanceof Foo).toBe(true);
    });

    it('should copy Date', function() {
      var date = new Date(123);
      expect(copy(date) instanceof Date).toBeTruthy();
      expect(copy(date).getTime()).toEqual(123);
      expect(copy(date) === date).toBeFalsy();
    });

    it('should copy RegExp', function() {
      var re = new RegExp('.*');
      expect(copy(re) instanceof RegExp).toBeTruthy();
      expect(copy(re).source).toBe('.*');
      expect(copy(re) === re).toBe(false);
    });

    it('should copy literal RegExp', function() {
      var re = /.*/;
      expect(copy(re) instanceof RegExp).toBeTruthy();
      expect(copy(re).source).toEqual('.*');
      expect(copy(re) === re).toBeFalsy();
    });

    it('should copy RegExp with flags', function() {
      var re = new RegExp('.*', 'gim');
      expect(copy(re).global).toBe(true);
      expect(copy(re).ignoreCase).toBe(true);
      expect(copy(re).multiline).toBe(true);
    });

    it('should copy RegExp with lastIndex', function() {
      var re = /a+b+/g;
      var str = 'ab aabb';
      expect(re.exec(str)[0]).toEqual('ab');
      expect(copy(re).exec(str)[0]).toEqual('aabb');
    });

    it('should deeply copy literal RegExp', function() {
      var objWithRegExp = {
        re: /.*/
      };
      expect(copy(objWithRegExp).re instanceof RegExp).toBeTruthy();
      expect(copy(objWithRegExp).re.source).toEqual('.*');
      expect(copy(objWithRegExp.re) === objWithRegExp.re).toBeFalsy();
    });

    it('should copy a Uint8Array with no destination', function() {
      if (typeof Uint8Array !== 'undefined') {
        var src = new Uint8Array(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Uint8Array).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy a Uint8ClampedArray with no destination', function() {
      if (typeof Uint8ClampedArray !== 'undefined') {
        var src = new Uint8ClampedArray(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Uint8ClampedArray).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy a Uint16Array with no destination', function() {
      if (typeof Uint16Array !== 'undefined') {
        var src = new Uint16Array(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Uint16Array).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy a Uint32Array with no destination', function() {
      if (typeof Uint32Array !== 'undefined') {
        var src = new Uint32Array(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Uint32Array).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy a Int8Array with no destination', function() {
      if (typeof Int8Array !== 'undefined') {
        var src = new Int8Array(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Int8Array).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy a Int16Array with no destination', function() {
      if (typeof Int16Array !== 'undefined') {
        var src = new Int16Array(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Int16Array).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy a Int32Array with no destination', function() {
      if (typeof Int32Array !== 'undefined') {
        var src = new Int32Array(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Int32Array).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy a Float32Array with no destination', function() {
      if (typeof Float32Array !== 'undefined') {
        var src = new Float32Array(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Float32Array).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy a Float64Array with no destination', function() {
      if (typeof Float64Array !== 'undefined') {
        var src = new Float64Array(2);
        src[1] = 1;
        var dst = copy(src);
        expect(copy(src) instanceof Float64Array).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should copy an ArrayBuffer with no destination', function() {
      if (typeof ArrayBuffer !== 'undefined') {
        var src = new ArrayBuffer(8);
        new Int32Array(src).set([1, 2]);

        var dst = copy(src);
        expect(dst instanceof ArrayBuffer).toBeTruthy();
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
      }
    });

    it('should handle ArrayBuffer objects with multiple references', function() {
      if (typeof ArrayBuffer !== 'undefined') {
        var buffer = new ArrayBuffer(8);
        var src = [new Int32Array(buffer), new Float32Array(buffer)];
        src[0].set([1, 2]);

        var dst = copy(src);
        expect(dst).toEqual(src);
        expect(dst[0]).not.toBe(src[0]);
        expect(dst[1]).not.toBe(src[1]);
        expect(dst[0].buffer).toBe(dst[1].buffer);
        expect(dst[0].buffer).not.toBe(buffer);
      }
    });

    it('should handle Int32Array objects with multiple references', function() {
      if (typeof Int32Array !== 'undefined') {
        var arr = new Int32Array(2);
        var src = [arr, arr];
        arr.set([1, 2]);

        var dst = copy(src);
        expect(dst).toEqual(src);
        expect(dst).not.toBe(src);
        expect(dst[0]).not.toBe(src[0]);
        expect(dst[0]).toBe(dst[1]);
        expect(dst[0].buffer).toBe(dst[1].buffer);
      }
    });

    it('should handle Blob objects', function() {
      if (typeof Blob !== 'undefined') {
        var src = new Blob(['foo'], {type: 'bar'});
        var dst = copy(src);

        expect(dst).not.toBe(src);
        expect(dst.size).toBe(3);
        expect(dst.type).toBe('bar');
        expect(isBlob(dst)).toBe(true);
      }
    });

    it('should handle Uint16Array subarray', function() {
      if (typeof Uint16Array !== 'undefined') {
        var arr = new Uint16Array(4);
        arr[1] = 1;
        var src = arr.subarray(1, 2);
        var dst = copy(src);
        expect(dst instanceof Uint16Array).toBeTruthy();
        expect(dst.length).toEqual(1);
        expect(dst[0]).toEqual(1);
        expect(dst).not.toBe(src);
        expect(dst.buffer).not.toBe(src.buffer);
      }
    });

    it('should throw an exception if a Uint8Array is the destination', function() {
      if (typeof Uint8Array !== 'undefined') {
        var src = new Uint8Array();
        var dst = new Uint8Array(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if a Uint8ClampedArray is the destination', function() {
      if (typeof Uint8ClampedArray !== 'undefined') {
        var src = new Uint8ClampedArray();
        var dst = new Uint8ClampedArray(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if a Uint16Array is the destination', function() {
      if (typeof Uint16Array !== 'undefined') {
        var src = new Uint16Array();
        var dst = new Uint16Array(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if a Uint32Array is the destination', function() {
      if (typeof Uint32Array !== 'undefined') {
        var src = new Uint32Array();
        var dst = new Uint32Array(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if a Int8Array is the destination', function() {
      if (typeof Int8Array !== 'undefined') {
        var src = new Int8Array();
        var dst = new Int8Array(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if a Int16Array is the destination', function() {
      if (typeof Int16Array !== 'undefined') {
        var src = new Int16Array();
        var dst = new Int16Array(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if a Int32Array is the destination', function() {
      if (typeof Int32Array !== 'undefined') {
        var src = new Int32Array();
        var dst = new Int32Array(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if a Float32Array is the destination', function() {
      if (typeof Float32Array !== 'undefined') {
        var src = new Float32Array();
        var dst = new Float32Array(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if a Float64Array is the destination', function() {
      if (typeof Float64Array !== 'undefined') {
        var src = new Float64Array();
        var dst = new Float64Array(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should throw an exception if an ArrayBuffer is the destination', function() {
      if (typeof ArrayBuffer !== 'undefined') {
        var src = new ArrayBuffer(5);
        var dst = new ArrayBuffer(5);
        expect(function() { copy(src, dst); })
          .toThrowMinErr('ng', 'cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
      }
    });

    it('should deeply copy an array into an existing array', function() {
      var src = [1, {name:'value'}];
      var dst = [{key:'v'}];
      expect(copy(src, dst)).toBe(dst);
      expect(dst).toEqual([1, {name:'value'}]);
      expect(dst[1]).toEqual({name:'value'});
      expect(dst[1]).not.toBe(src[1]);
    });

    it('should deeply copy an array into a new array', function() {
      var src = [1, {name:'value'}];
      var dst = copy(src);
      expect(src).toEqual([1, {name:'value'}]);
      expect(dst).toEqual(src);
      expect(dst).not.toBe(src);
      expect(dst[1]).not.toBe(src[1]);
    });

    it('should copy empty array', function() {
      var src = [];
      var dst = [{key: 'v'}];
      expect(copy(src, dst)).toEqual([]);
      expect(dst).toEqual([]);
    });

    it('should deeply copy an object into an existing object', function() {
      var src = {a:{name:'value'}};
      var dst = {b:{key:'v'}};
      expect(copy(src, dst)).toBe(dst);
      expect(dst).toEqual({a:{name:'value'}});
      expect(dst.a).toEqual(src.a);
      expect(dst.a).not.toBe(src.a);
    });

    it('should deeply copy an object into a non-existing object', function() {
      var src = {a:{name:'value'}};
      var dst = copy(src, undefined);
      expect(src).toEqual({a:{name:'value'}});
      expect(dst).toEqual(src);
      expect(dst).not.toBe(src);
      expect(dst.a).toEqual(src.a);
      expect(dst.a).not.toBe(src.a);
    });

    it('should copy primitives', function() {
      expect(copy(null)).toEqual(null);
      expect(copy('')).toBe('');
      expect(copy('lala')).toBe('lala');
      expect(copy(123)).toEqual(123);
      expect(copy([{key:null}])).toEqual([{key:null}]);
    });

    it('should throw an exception if a Scope is being copied', inject(function($rootScope) {
      expect(function() { copy($rootScope.$new()); }).
          toThrowMinErr('ng', 'cpws', 'Can\'t copy! Making copies of Window or Scope instances is not supported.');
      expect(function() { copy({child: $rootScope.$new()}, {}); }).
          toThrowMinErr('ng', 'cpws', 'Can\'t copy! Making copies of Window or Scope instances is not supported.');
      expect(function() { copy([$rootScope.$new()]); }).
          toThrowMinErr('ng', 'cpws', 'Can\'t copy! Making copies of Window or Scope instances is not supported.');
    }));

    it('should throw an exception if a Window is being copied', function() {
      expect(function() { copy(window); }).
          toThrowMinErr('ng', 'cpws', 'Can\'t copy! Making copies of Window or Scope instances is not supported.');
      expect(function() { copy({child: window}); }).
          toThrowMinErr('ng', 'cpws', 'Can\'t copy! Making copies of Window or Scope instances is not supported.');
      expect(function() { copy([window], []); }).
          toThrowMinErr('ng', 'cpws', 'Can\'t copy! Making copies of Window or Scope instances is not supported.');
    });

    it('should throw an exception when source and destination are equivalent', function() {
      var src, dst;
      src = dst = {key: 'value'};
      expect(function() { copy(src, dst); }).toThrowMinErr('ng', 'cpi', 'Can\'t copy! Source and destination are identical.');
      src = dst = [2, 4];
      expect(function() { copy(src, dst); }).toThrowMinErr('ng', 'cpi', 'Can\'t copy! Source and destination are identical.');
    });

    it('should not copy the private $$hashKey', function() {
      var src,dst;
      src = {};
      hashKey(src);
      dst = copy(src);
      expect(hashKey(dst)).not.toEqual(hashKey(src));

      src = {foo: {}};
      hashKey(src.foo);
      dst = copy(src);
      expect(hashKey(src.foo)).not.toEqual(hashKey(dst.foo));
    });

    it('should retain the previous $$hashKey when copying object with hashKey', function() {
      var src,dst,h;
      src = {};
      dst = {};
      // force creation of a hashkey
      h = hashKey(dst);
      hashKey(src);
      dst = copy(src,dst);

      // make sure we don't copy the key
      expect(hashKey(dst)).not.toEqual(hashKey(src));
      // make sure we retain the old key
      expect(hashKey(dst)).toEqual(h);
    });

    it('should retain the previous $$hashKey when copying non-object', function() {
      var dst = {};
      var h = hashKey(dst);

      copy(null, dst);
      expect(hashKey(dst)).toEqual(h);

      copy(42, dst);
      expect(hashKey(dst)).toEqual(h);

      copy(new Date(), dst);
      expect(hashKey(dst)).toEqual(h);
    });

    it('should handle circular references', function() {
      var a = {b: {a: null}, self: null, selfs: [null, null, [null]]};
      a.b.a = a;
      a.self = a;
      a.selfs = [a, a.b, [a]];

      var aCopy = copy(a, null);
      expect(aCopy).toEqual(a);

      expect(aCopy).not.toBe(a);
      expect(aCopy).toBe(aCopy.self);
      expect(aCopy).toBe(aCopy.selfs[2][0]);
      expect(aCopy.selfs[2]).not.toBe(a.selfs[2]);

      var copyTo = [];
      aCopy = copy(a, copyTo);
      expect(aCopy).toBe(copyTo);
      expect(aCopy).not.toBe(a);
      expect(aCopy).toBe(aCopy.self);
    });

    it('should deeply copy XML nodes', function() {
      var anElement = document.createElement('foo');
      anElement.appendChild(document.createElement('bar'));
      var theCopy = anElement.cloneNode(true);
      expect(copy(anElement).outerHTML).toEqual(theCopy.outerHTML);
      expect(copy(anElement)).not.toBe(anElement);
    });

    it('should not try to call a non-function called `cloneNode`', function() {
      expect(copy.bind(null, { cloneNode: 100 })).not.toThrow();
    });

    it('should handle objects with multiple references', function() {
      var b = {};
      var a = [b, -1, b];

      var aCopy = copy(a);
      expect(aCopy[0]).not.toBe(a[0]);
      expect(aCopy[0]).toBe(aCopy[2]);

      var copyTo = [];
      aCopy = copy(a, copyTo);
      expect(aCopy).toBe(copyTo);
      expect(aCopy[0]).not.toBe(a[0]);
      expect(aCopy[0]).toBe(aCopy[2]);
    });

    it('should handle date/regex objects with multiple references', function() {
      var re = /foo/;
      var d = new Date();
      var o = {re: re, re2: re, d: d, d2: d};

      var oCopy = copy(o);
      expect(oCopy.re).toBe(oCopy.re2);
      expect(oCopy.d).toBe(oCopy.d2);

      oCopy = copy(o, {});
      expect(oCopy.re).toBe(oCopy.re2);
      expect(oCopy.d).toBe(oCopy.d2);
    });

    it('should clear destination arrays correctly when source is non-array', function() {
      expect(copy(null, [1,2,3])).toEqual([]);
      expect(copy(undefined, [1,2,3])).toEqual([]);
      expect(copy({0: 1, 1: 2}, [1,2,3])).toEqual([1,2]);
      expect(copy(new Date(), [1,2,3])).toEqual([]);
      expect(copy(/a/, [1,2,3])).toEqual([]);
      expect(copy(true, [1,2,3])).toEqual([]);
    });

    it('should clear destination objects correctly when source is non-array', function() {
      expect(copy(null, {0:1,1:2,2:3})).toEqual({});
      expect(copy(undefined, {0:1,1:2,2:3})).toEqual({});
      expect(copy(new Date(), {0:1,1:2,2:3})).toEqual({});
      expect(copy(/a/, {0:1,1:2,2:3})).toEqual({});
      expect(copy(true, {0:1,1:2,2:3})).toEqual({});
    });

    it('should copy objects with no prototype parent', function() {
      var obj = extend(Object.create(null), {
        a: 1,
        b: 2,
        c: 3
      });
      var dest = copy(obj);

      expect(Object.getPrototypeOf(dest)).toBe(null);
      expect(dest.a).toBe(1);
      expect(dest.b).toBe(2);
      expect(dest.c).toBe(3);
      expect(Object.keys(dest)).toEqual(['a', 'b', 'c']);
    });

    it('should copy String() objects', function() {
      // eslint-disable-next-line no-new-wrappers
      var obj = new String('foo');
      var dest = copy(obj);
      expect(dest).not.toBe(obj);
      expect(isObject(dest)).toBe(true);
      expect(dest.valueOf()).toBe(obj.valueOf());
    });

    it('should copy Boolean() objects', function() {
      // eslint-disable-next-line no-new-wrappers
      var obj = new Boolean(true);
      var dest = copy(obj);
      expect(dest).not.toBe(obj);
      expect(isObject(dest)).toBe(true);
      expect(dest.valueOf()).toBe(obj.valueOf());
    });

    it('should copy Number() objects', function() {
      // eslint-disable-next-line no-new-wrappers
      var obj = new Number(42);
      var dest = copy(obj);
      expect(dest).not.toBe(obj);
      expect(isObject(dest)).toBe(true);
      expect(dest.valueOf()).toBe(obj.valueOf());
    });

    it('should copy falsy String/Boolean/Number objects', function() {
      /* eslint-disable no-new-wrappers */
      expect(copy(new String('')).valueOf()).toBe('');
      expect(copy(new Boolean(false)).valueOf()).toBe(false);
      expect(copy(new Number(0)).valueOf()).toBe(0);
      expect(copy(new Number(NaN)).valueOf()).toBeNaN();
      /* eslint-enable */
    });
  });

  describe('extend', function() {

    it('should not copy the private $$hashKey', function() {
      var src,dst;
      src = {};
      dst = {};
      hashKey(src);
      dst = extend(dst,src);
      expect(hashKey(dst)).not.toEqual(hashKey(src));
    });


    it('should copy the properties of the source object onto the destination object', function() {
      var destination, source;
      destination = {};
			source = {foo: true};
      destination = extend(destination, source);
      expect(isDefined(destination.foo)).toBe(true);
    });


    it('ISSUE #4751 - should copy the length property of an object source to the destination object', function() {
      var destination, source;
      destination = {};
      source = {radius: 30, length: 0};
      destination = extend(destination, source);
      expect(isDefined(destination.length)).toBe(true);
      expect(isDefined(destination.radius)).toBe(true);
    });

    it('should retain the previous $$hashKey', function() {
      var src,dst,h;
      src = {};
      dst = {};
      h = hashKey(dst);
      hashKey(src);
      dst = extend(dst,src);
      // make sure we don't copy the key
      expect(hashKey(dst)).not.toEqual(hashKey(src));
      // make sure we retain the old key
      expect(hashKey(dst)).toEqual(h);
    });


    it('should work when extending with itself', function() {
      var src,dst,h;
      dst = src = {};
      h = hashKey(dst);
      dst = extend(dst,src);
      // make sure we retain the old key
      expect(hashKey(dst)).toEqual(h);
    });


    it('should copy dates by reference', function() {
      var src = { date: new Date() };
      var dst = {};

      extend(dst, src);

      expect(dst.date).toBe(src.date);
    });

    it('should copy elements by reference', function() {
      var src = { element: document.createElement('div'),
        jqObject: jqLite('<p><span>s1</span><span>s2</span></p>').find('span') };
      var dst = {};

      extend(dst, src);

      expect(dst.element).toBe(src.element);
      expect(dst.jqObject).toBe(src.jqObject);
    });
  });


  describe('merge', function() {
    it('should recursively copy objects into dst from left to right', function() {
      var dst = { foo: { bar: 'foobar' }};
      var src1 = { foo: { bazz: 'foobazz' }};
      var src2 = { foo: { bozz: 'foobozz' }};
      merge(dst, src1, src2);
      expect(dst).toEqual({
        foo: {
          bar: 'foobar',
          bazz: 'foobazz',
          bozz: 'foobozz'
        }
      });
    });


    it('should replace primitives with objects', function() {
      var dst = { foo: 'bloop' };
      var src = { foo: { bar: { baz: 'bloop' }}};
      merge(dst, src);
      expect(dst).toEqual({
        foo: {
          bar: {
            baz: 'bloop'
          }
        }
      });
    });


    it('should replace null values in destination with objects', function() {
      var dst = { foo: null };
      var src = { foo: { bar: { baz: 'bloop' }}};
      merge(dst, src);
      expect(dst).toEqual({
        foo: {
          bar: {
            baz: 'bloop'
          }
        }
      });
    });


    it('should copy references to functions by value rather than merging', function() {
      function fn() {}
      var dst = { foo: 1 };
      var src = { foo: fn };
      merge(dst, src);
      expect(dst).toEqual({
        foo: fn
      });
    });


    it('should create a new array if destination property is a non-object and source property is an array', function() {
      var dst = { foo: NaN };
      var src = { foo: [1,2,3] };
      merge(dst, src);
      expect(dst).toEqual({
        foo: [1,2,3]
      });
      expect(dst.foo).not.toBe(src.foo);
    });


    it('should copy dates by value', function() {
      var src = { date: new Date() };
      var dst = {};

      merge(dst, src);

      expect(dst.date).not.toBe(src.date);
      expect(isDate(dst.date)).toBeTruthy();
      expect(dst.date.valueOf()).toEqual(src.date.valueOf());
    });

    it('should copy regexp by value', function() {
      var src = { regexp: /blah/ };
      var dst = {};

      merge(dst, src);

      expect(dst.regexp).not.toBe(src.regexp);
      expect(isRegExp(dst.regexp)).toBe(true);
      expect(dst.regexp.toString()).toBe(src.regexp.toString());
    });


    it('should copy(clone) elements', function() {
      var src = {
        element: document.createElement('div'),
        jqObject: jqLite('<p><span>s1</span><span>s2</span></p>').find('span')
      };
      var dst = {};

      merge(dst, src);

      expect(dst.element).not.toBe(src.element);
      expect(dst.jqObject).not.toBe(src.jqObject);

      expect(isElement(dst.element)).toBeTruthy();
      expect(dst.element.nodeName).toBeDefined(); // i.e it is a DOM element
      expect(isElement(dst.jqObject)).toBeTruthy();
      expect(dst.jqObject.nodeName).toBeUndefined(); // i.e it is a jqLite/jQuery object
    });
  });


  describe('shallow copy', function() {
    it('should make a copy', function() {
      var original = {key:{}};
      var copy = shallowCopy(original);
      expect(copy).toEqual(original);
      expect(copy.key).toBe(original.key);
    });

    it('should omit "$$"-prefixed properties', function() {
      var original = {$$some: true, $$: true};
      var clone = {};

      expect(shallowCopy(original, clone)).toBe(clone);
      expect(clone.$$some).toBeUndefined();
      expect(clone.$$).toBeUndefined();
    });

    it('should copy "$"-prefixed properties from copy', function() {
      var original = {$some: true};
      var clone = {};

      expect(shallowCopy(original, clone)).toBe(clone);
      expect(clone.$some).toBe(original.$some);
    });

    it('should handle arrays', function() {
      var original = [{}, 1],
          clone = [];

      var aCopy = shallowCopy(original);
      expect(aCopy).not.toBe(original);
      expect(aCopy).toEqual(original);
      expect(aCopy[0]).toBe(original[0]);

      expect(shallowCopy(original, clone)).toBe(clone);
      expect(clone).toEqual(original);
    });

    it('should handle primitives', function() {
      expect(shallowCopy('test')).toBe('test');
      expect(shallowCopy(3)).toBe(3);
      expect(shallowCopy(true)).toBe(true);
    });
  });

  describe('elementHTML', function() {
    it('should dump element', function() {
      expect(startingTag('<div attr="123">something<span></span></div>')).
        toEqual('<div attr="123">');
    });
  });

  describe('equals', function() {
    it('should return true if same object', function() {
      var o = {};
      expect(equals(o, o)).toEqual(true);
      expect(equals(o, {})).toEqual(true);
      expect(equals(1, '1')).toEqual(false);
      expect(equals(1, '2')).toEqual(false);
    });

    it('should recurse into object', function() {
      expect(equals({}, {})).toEqual(true);
      expect(equals({name:'misko'}, {name:'misko'})).toEqual(true);
      expect(equals({name:'misko', age:1}, {name:'misko'})).toEqual(false);
      expect(equals({name:'misko'}, {name:'misko', age:1})).toEqual(false);
      expect(equals({name:'misko'}, {name:'adam'})).toEqual(false);
      expect(equals(['misko'], ['misko'])).toEqual(true);
      expect(equals(['misko'], ['adam'])).toEqual(false);
      expect(equals(['misko'], ['misko', 'adam'])).toEqual(false);
    });

    it('should ignore undefined member variables during comparison', function() {
      var obj1 = {name: 'misko'},
          obj2 = {name: 'misko', undefinedvar: undefined};

      expect(equals(obj1, obj2)).toBe(true);
      expect(equals(obj2, obj1)).toBe(true);
    });

    it('should ignore $ member variables', function() {
      expect(equals({name:'misko', $id:1}, {name:'misko', $id:2})).toEqual(true);
      expect(equals({name:'misko'}, {name:'misko', $id:2})).toEqual(true);
      expect(equals({name:'misko', $id:1}, {name:'misko'})).toEqual(true);
    });

    it('should ignore functions', function() {
      expect(equals({func: function() {}}, {bar: function() {}})).toEqual(true);
    });

    it('should work well with nulls', function() {
      expect(equals(null, '123')).toBe(false);
      expect(equals('123', null)).toBe(false);

      var obj = {foo:'bar'};
      expect(equals(null, obj)).toBe(false);
      expect(equals(obj, null)).toBe(false);

      expect(equals(null, null)).toBe(true);
    });

    it('should work well with undefined', function() {
      expect(equals(undefined, '123')).toBe(false);
      expect(equals('123', undefined)).toBe(false);

      var obj = {foo:'bar'};
      expect(equals(undefined, obj)).toBe(false);
      expect(equals(obj, undefined)).toBe(false);

      expect(equals(undefined, undefined)).toBe(true);
    });

    it('should treat two NaNs as equal', function() {
      expect(equals(NaN, NaN)).toBe(true);
    });

    it('should compare Scope instances only by identity', inject(function($rootScope) {
      var scope1 = $rootScope.$new(),
          scope2 = $rootScope.$new();

      expect(equals(scope1, scope1)).toBe(true);
      expect(equals(scope1, scope2)).toBe(false);
      expect(equals($rootScope, scope1)).toBe(false);
      expect(equals(undefined, scope1)).toBe(false);
    }));

    it('should compare Window instances only by identity', function() {
      expect(equals(window, window)).toBe(true);
      expect(equals(window, window.parent)).toBe(false);
      expect(equals(window, undefined)).toBe(false);
    });

    it('should compare dates', function() {
      expect(equals(new Date(0), new Date(0))).toBe(true);
      expect(equals(new Date(0), new Date(1))).toBe(false);
      expect(equals(new Date(0), 0)).toBe(false);
      expect(equals(0, new Date(0))).toBe(false);

      expect(equals(new Date(undefined), new Date(undefined))).toBe(true);
      expect(equals(new Date(undefined), new Date(0))).toBe(false);
      expect(equals(new Date(undefined), new Date(null))).toBe(false);
      expect(equals(new Date(undefined), new Date('wrong'))).toBe(true);
      expect(equals(new Date(), /abc/)).toBe(false);
    });

    it('should correctly test for keys that are present on Object.prototype', function() {
      expect(equals({}, {hasOwnProperty: 1})).toBe(false);
      expect(equals({}, {toString: null})).toBe(false);
    });

    it('should compare regular expressions', function() {
      expect(equals(/abc/, /abc/)).toBe(true);
      expect(equals(/abc/i, new RegExp('abc', 'i'))).toBe(true);
      expect(equals(new RegExp('abc', 'i'), new RegExp('abc', 'i'))).toBe(true);
      expect(equals(new RegExp('abc', 'i'), new RegExp('abc'))).toBe(false);
      expect(equals(/abc/i, /abc/)).toBe(false);
      expect(equals(/abc/, /def/)).toBe(false);
      expect(equals(/^abc/, /abc/)).toBe(false);
      expect(equals(/^abc/, '/^abc/')).toBe(false);
      expect(equals(/abc/, new Date())).toBe(false);
    });

    it('should return false when comparing an object and an array', function() {
      expect(equals({}, [])).toBe(false);
      expect(equals([], {})).toBe(false);
    });

    it('should return false when comparing an object and a RegExp', function() {
      expect(equals({}, /abc/)).toBe(false);
      expect(equals({}, new RegExp('abc', 'i'))).toBe(false);
    });

    it('should return false when comparing an object and a Date', function() {
      expect(equals({}, new Date())).toBe(false);
    });

    it('should safely compare objects with no prototype parent', function() {
      var o1 = extend(Object.create(null), {
        a: 1, b: 2, c: 3
      });
      var o2 = extend(Object.create(null), {
        a: 1, b: 2, c: 3
      });
      expect(equals(o1, o2)).toBe(true);
      o2.c = 2;
      expect(equals(o1, o2)).toBe(false);
    });


    it('should safely compare objects which shadow Object.prototype.hasOwnProperty', function() {
      var o1 = {
        hasOwnProperty: true,
        a: 1,
        b: 2,
        c: 3
      };
      var o2 = {
        hasOwnProperty: true,
        a: 1,
        b: 2,
        c: 3
      };
      expect(equals(o1, o2)).toBe(true);
      o1.hasOwnProperty = function() {};
      expect(equals(o1, o2)).toBe(false);
    });
  });


  describe('csp', function() {