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// Copyright 2009 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// All Rights Reserved
/**
* @fileoverview A driver for testing renderers.
*
* @author nicksantos@google.com (Nick Santos)
*/
goog.provide('goog.testing.ui.RendererHarness');
goog.require('goog.Disposable');
goog.require('goog.dom.NodeType');
goog.require('goog.testing.asserts');
/**
* A driver for testing renderers.
*
* @param {goog.ui.ControlRenderer} renderer A renderer to test.
* @param {Element} renderParent The parent of the element where controls will
* be rendered.
* @param {Element} decorateParent The parent of the element where controls will
* be decorated.
* @constructor
* @extends {goog.Disposable}
*/
goog.testing.ui.RendererHarness = function(renderer, renderParent,
decorateParent) {
goog.Disposable.call(this);
/**
* The renderer under test.
* @type {goog.ui.ControlRenderer}
* @private
*/
this.renderer_ = renderer;
/**
* The parent of the element where controls will be rendered.
* @type {Element}
* @private
*/
this.renderParent_ = renderParent;
/**
* The original HTML of the render element.
* @type {string}
* @private
*/
this.renderHtml_ = renderParent.innerHTML;
/**
* Teh parent of the element where controls will be decorated.
* @type {Element}
* @private
*/
this.decorateParent_ = decorateParent;
/**
* The original HTML of the decorated element.
* @type {string}
* @private
*/
this.decorateHtml_ = decorateParent.innerHTML;
};
goog.inherits(goog.testing.ui.RendererHarness, goog.Disposable);
/**
* A control to create by decoration.
* @type {goog.ui.Control}
* @private
*/
goog.testing.ui.RendererHarness.prototype.decorateControl_;
/**
* A control to create by rendering.
* @type {goog.ui.Control}
* @private
*/
goog.testing.ui.RendererHarness.prototype.renderControl_;
/**
* Whether all the necessary assert methods have been called.
* @type {boolean}
* @private
*/
goog.testing.ui.RendererHarness.prototype.verified_ = false;
/**
* Attach a control and render its DOM.
* @param {goog.ui.Control} control A control.
* @return {Element} The element created.
*/
goog.testing.ui.RendererHarness.prototype.attachControlAndRender =
function(control) {
this.renderControl_ = control;
control.setRenderer(this.renderer_);
control.render(this.renderParent_);
return control.getElement();
};
/**
* Attach a control and decorate the element given in the constructor.
* @param {goog.ui.Control} control A control.
* @return {Element} The element created.
*/
goog.testing.ui.RendererHarness.prototype.attachControlAndDecorate =
function(control) {
this.decorateControl_ = control;
control.setRenderer(this.renderer_);
var child = this.decorateParent_.firstChild;
assertEquals('The decorated node must be an element',
goog.dom.NodeType.ELEMENT, child.nodeType);
control.decorate(/** @type {Element} */ (child));
return control.getElement();
};
/**
* Assert that the rendered element and the decorated element match.
*/
goog.testing.ui.RendererHarness.prototype.assertDomMatches = function() {
assert('Both elements were not generated',
!!(this.renderControl_ && this.decorateControl_));
assertHTMLEquals(
'Rendered control and decorated control produced different HTML',
this.renderControl_.getElement().innerHTML,
this.decorateControl_.getElement().innerHTML);
this.verified_ = true;
};
/**
* Destroy the harness, verifying that all assertions had been checked.
* @override
* @protected
*/
goog.testing.ui.RendererHarness.prototype.disposeInternal = function() {
// If the harness was not verified appropriately, throw an exception.
assert('Expected assertDomMatches to be called',
this.verified_ || !this.renderControl_ || !this.decorateControl_);
if (this.decorateControl_) {
this.decorateControl_.dispose();
}
if (this.renderControl_) {
this.renderControl_.dispose();
}
this.renderParent_.innerHTML = this.renderHtml_;
this.decorateParent_.innerHTML = this.decorateHtml_;
goog.testing.ui.RendererHarness.superClass_.disposeInternal.call(this);
};
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