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- goog.setTestOnly('goog.testing.PropertyReplacer');
- goog.provide('goog.testing.PropertyReplacer');
- goog.require('goog.testing.ObjectPropertyString');
- goog.require('goog.userAgent');
- goog.testing.PropertyReplacer = function() {
-
- this.original_ = [];
- };
- goog.testing.PropertyReplacer.NO_SUCH_KEY_ = {};
- goog.testing.PropertyReplacer.hasKey_ = function(obj, key) {
- if (!(key in obj)) {
- return false;
- }
-
-
- if (Object.prototype.hasOwnProperty.call(obj, key)) {
- return true;
- }
-
-
-
- if (obj.constructor == Object &&
- (!goog.userAgent.OPERA ||
- Object.prototype.toString.call(obj) == '[object Object]')) {
- return false;
- }
- try {
-
-
-
-
-
-
-
- var dummy = obj.constructor.prototype[key];
- } catch (e) {
- return true;
- }
- return !(key in obj.constructor.prototype);
- };
- goog.testing.PropertyReplacer.deleteKey_ = function(obj, key) {
- try {
- delete obj[key];
-
- if (!goog.testing.PropertyReplacer.hasKey_(obj, key)) {
- return;
- }
- } catch (e) {
-
-
- }
- obj[key] = undefined;
- if (obj[key] == 'undefined') {
-
-
- obj[key] = '';
- }
- if (obj[key]) {
- throw Error(
- 'Cannot delete non configurable property "' + key + '" in ' + obj);
- }
- };
- goog.testing.PropertyReplacer.restoreOriginal_ = function(original) {
- if (original.value == goog.testing.PropertyReplacer.NO_SUCH_KEY_) {
- goog.testing.PropertyReplacer.deleteKey_(original.object, original.key);
- } else {
- original.object[original.key] = original.value;
- }
- };
- goog.testing.PropertyReplacer.prototype.set = function(obj, key, value) {
- var origValue = goog.testing.PropertyReplacer.hasKey_(obj, key) ?
- obj[key] :
- goog.testing.PropertyReplacer.NO_SUCH_KEY_;
- this.original_.push({object: obj, key: key, value: origValue});
- obj[key] = value;
-
-
-
-
-
- if (obj[key] != value && (value + 'px') != obj[key]) {
- throw Error('Cannot overwrite read-only property "' + key + '" in ' + obj);
- }
- };
- goog.testing.PropertyReplacer.prototype.replace = function(
- obj, key, value, opt_allowNullOrUndefined) {
- if (!(key in obj)) {
- throw Error('Cannot replace missing property "' + key + '" in ' + obj);
- }
-
-
- var shouldCheckTypes = !opt_allowNullOrUndefined ||
- (goog.isDefAndNotNull(obj[key]) && goog.isDefAndNotNull(value));
- if (shouldCheckTypes) {
- var originalType = goog.typeOf(obj[key]);
- var newType = goog.typeOf(value);
- if (originalType != newType) {
- throw Error(
- 'Cannot replace property "' + key + '" in ' + obj +
- ' with a value of different type (expected ' + originalType +
- ', found ' + newType + ')');
- }
- }
- this.set(obj, key, value);
- };
- goog.testing.PropertyReplacer.prototype.setPath = function(path, value) {
- var parts = path.split('.');
- var obj = goog.global;
- for (var i = 0; i < parts.length - 1; i++) {
- var part = parts[i];
- if (part == 'prototype' && !obj[part]) {
- throw Error('Cannot set the prototype of ' + parts.slice(0, i).join('.'));
- }
- if (!goog.isObject(obj[part]) && !goog.isFunction(obj[part])) {
- this.set(obj, part, {});
- }
- obj = obj[part];
- }
- this.set(obj, parts[parts.length - 1], value);
- };
- goog.testing.PropertyReplacer.prototype.remove = function(obj, key) {
- if (goog.testing.PropertyReplacer.hasKey_(obj, key)) {
- this.original_.push({object: obj, key: key, value: obj[key]});
- goog.testing.PropertyReplacer.deleteKey_(obj, key);
- }
- };
- goog.testing.PropertyReplacer.prototype.restore = function(obj, key) {
- for (var i = this.original_.length - 1; i >= 0; i--) {
- var original = this.original_[i];
- if (original.object === obj && original.key == key) {
- goog.testing.PropertyReplacer.restoreOriginal_(original);
- this.original_.splice(i, 1);
- return;
- }
- }
- throw Error('Cannot restore unmodified property "' + key + '" of ' + obj);
- };
- goog.testing.PropertyReplacer.prototype.reset = function() {
- for (var i = this.original_.length - 1; i >= 0; i--) {
- goog.testing.PropertyReplacer.restoreOriginal_(this.original_[i]);
- delete this.original_[i];
- }
- this.original_.length = 0;
- };
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