219 lines
		
	
	
		
			6.5 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			219 lines
		
	
	
		
			6.5 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
'use strict';
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Object.defineProperty(exports, '__esModule', {
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  value: true
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});
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exports.equals = void 0;
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exports.isA = isA;
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/*
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Copyright (c) 2008-2016 Pivotal Labs
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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// Extracted out of jasmine 2.5.2
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const equals = (a, b, customTesters, strictCheck) => {
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  customTesters = customTesters || [];
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  return eq(a, b, [], [], customTesters, strictCheck);
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};
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exports.equals = equals;
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function isAsymmetric(obj) {
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  return !!obj && isA('Function', obj.asymmetricMatch);
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}
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function asymmetricMatch(a, b) {
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  const asymmetricA = isAsymmetric(a);
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  const asymmetricB = isAsymmetric(b);
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  if (asymmetricA && asymmetricB) {
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    return undefined;
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  }
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  if (asymmetricA) {
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    return a.asymmetricMatch(b);
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  }
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  if (asymmetricB) {
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    return b.asymmetricMatch(a);
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  }
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}
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// Equality function lovingly adapted from isEqual in
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//   [Underscore](http://underscorejs.org)
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function eq(a, b, aStack, bStack, customTesters, strictCheck) {
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  let result = true;
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  const asymmetricResult = asymmetricMatch(a, b);
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  if (asymmetricResult !== undefined) {
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    return asymmetricResult;
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  }
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  const testerContext = {
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    equals
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  };
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  for (let i = 0; i < customTesters.length; i++) {
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    const customTesterResult = customTesters[i].call(
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      testerContext,
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      a,
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      b,
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      customTesters
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    );
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    if (customTesterResult !== undefined) {
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      return customTesterResult;
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    }
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  }
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  if (a instanceof Error && b instanceof Error) {
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    return a.message == b.message;
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  }
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  if (Object.is(a, b)) {
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    return true;
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  }
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  // A strict comparison is necessary because `null == undefined`.
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  if (a === null || b === null) {
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    return a === b;
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  }
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  const className = Object.prototype.toString.call(a);
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  if (className != Object.prototype.toString.call(b)) {
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    return false;
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  }
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  switch (className) {
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    case '[object Boolean]':
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    case '[object String]':
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    case '[object Number]':
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      if (typeof a !== typeof b) {
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        // One is a primitive, one a `new Primitive()`
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        return false;
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      } else if (typeof a !== 'object' && typeof b !== 'object') {
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        // both are proper primitives
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        return Object.is(a, b);
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      } else {
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        // both are `new Primitive()`s
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        return Object.is(a.valueOf(), b.valueOf());
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      }
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    case '[object Date]':
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      // Coerce dates to numeric primitive values. Dates are compared by their
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      // millisecond representations. Note that invalid dates with millisecond representations
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      // of `NaN` are not equivalent.
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      return +a == +b;
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    // RegExps are compared by their source patterns and flags.
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    case '[object RegExp]':
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      return a.source === b.source && a.flags === b.flags;
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  }
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  if (typeof a !== 'object' || typeof b !== 'object') {
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    return false;
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  }
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  // Use DOM3 method isEqualNode (IE>=9)
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  if (isDomNode(a) && isDomNode(b)) {
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    return a.isEqualNode(b);
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  }
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  // Used to detect circular references.
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  let length = aStack.length;
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  while (length--) {
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    // Linear search. Performance is inversely proportional to the number of
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    // unique nested structures.
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    // circular references at same depth are equal
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    // circular reference is not equal to non-circular one
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    if (aStack[length] === a) {
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      return bStack[length] === b;
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    } else if (bStack[length] === b) {
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      return false;
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    }
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  }
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  // Add the first object to the stack of traversed objects.
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  aStack.push(a);
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  bStack.push(b);
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  // Recursively compare objects and arrays.
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  // Compare array lengths to determine if a deep comparison is necessary.
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  if (strictCheck && className == '[object Array]' && a.length !== b.length) {
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    return false;
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  }
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  // Deep compare objects.
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  const aKeys = keys(a, hasKey);
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  let key;
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  const bKeys = keys(b, hasKey);
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  // Add keys corresponding to asymmetric matchers if they miss in non strict check mode
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  if (!strictCheck) {
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    for (let index = 0; index !== bKeys.length; ++index) {
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      key = bKeys[index];
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      if ((isAsymmetric(b[key]) || b[key] === undefined) && !hasKey(a, key)) {
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        aKeys.push(key);
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      }
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    }
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    for (let index = 0; index !== aKeys.length; ++index) {
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      key = aKeys[index];
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      if ((isAsymmetric(a[key]) || a[key] === undefined) && !hasKey(b, key)) {
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        bKeys.push(key);
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      }
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    }
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  }
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  // Ensure that both objects contain the same number of properties before comparing deep equality.
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  let size = aKeys.length;
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  if (bKeys.length !== size) {
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    return false;
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  }
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  while (size--) {
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    key = aKeys[size];
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    // Deep compare each member
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    if (strictCheck)
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      result =
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        hasKey(b, key) &&
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        eq(a[key], b[key], aStack, bStack, customTesters, strictCheck);
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    else
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      result =
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        (hasKey(b, key) || isAsymmetric(a[key]) || a[key] === undefined) &&
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        eq(a[key], b[key], aStack, bStack, customTesters, strictCheck);
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    if (!result) {
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      return false;
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    }
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  }
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  // Remove the first object from the stack of traversed objects.
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  aStack.pop();
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  bStack.pop();
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  return result;
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}
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function keys(obj, hasKey) {
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  const keys = [];
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  for (const key in obj) {
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    if (hasKey(obj, key)) {
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      keys.push(key);
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    }
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  }
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  return keys.concat(
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    Object.getOwnPropertySymbols(obj).filter(
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      symbol => Object.getOwnPropertyDescriptor(obj, symbol).enumerable
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    )
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  );
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}
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function hasKey(obj, key) {
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  return Object.prototype.hasOwnProperty.call(obj, key);
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}
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function isA(typeName, value) {
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  return Object.prototype.toString.apply(value) === `[object ${typeName}]`;
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}
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function isDomNode(obj) {
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  return (
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    obj !== null &&
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    typeof obj === 'object' &&
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    typeof obj.nodeType === 'number' &&
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    typeof obj.nodeName === 'string' &&
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    typeof obj.isEqualNode === 'function'
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  );
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}
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