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/*

* JavaScript Load Image Test 1.1.6

* https://github.com/blueimp/JavaScript-Load-Image

*

* Copyright 2011, Sebastian Tschan

* https://blueimp.net

*

* Licensed under the MIT license:

* http://www.opensource.org/licenses/MIT

*/

/*global window, describe, it, expect */

(function (expect, loadImage) {

'use strict';

// 80x60px GIF image (color black, base64 data):

var b64Data = 'R0lGODdhUAA8AIABAAAAAP///ywAAAAAUAA8AAACS4SPqcvtD6' +

'OctNqLs968+w+G4kiW5omm6sq27gvH8kzX9o3n+s73/g8MCofE' +

'ovGITCqXzKbzCY1Kp9Sq9YrNarfcrvcLDovH5PKsAAA7',

imageUrl = 'data:image/gif;base64,' + b64Data,

blob = window.dataURLtoBlob && window.dataURLtoBlob(imageUrl);

describe('Loading', function () {

it('Return the img element or FileReader object to allow aborting the image load', function () {

var img = loadImage(blob, function () {});

expect(img).to.be.an(Object);

expect(img.onload).to.be.a('function');

expect(img.onerror).to.be.a('function');

});

it('Load image url', function (done) {

expect(loadImage(imageUrl, function (img) {

done();

expect(img.width).to.be(80);

expect(img.height).to.be(60);

})).to.be.ok();

});

it('Load image blob', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(80);

expect(img.height).to.be(60);

})).to.be.ok();

});

it('Return image loading error to callback', function (done) {

expect(loadImage('404', function (img) {

done();

expect(img).to.be.a(window.Event);

expect(img.type).to.be('error');

})).to.be.ok();

});

});

describe('Scaling', function () {

it('Scale to options.maxWidth', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(40);

expect(img.height).to.be(30);

}, {maxWidth: 40})).to.be.ok();

});

it('Scale to options.maxHeight', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(20);

expect(img.height).to.be(15);

}, {maxHeight: 15})).to.be.ok();

});

it('Scale to options.minWidth', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(160);

expect(img.height).to.be(120);

}, {minWidth: 160})).to.be.ok();

});

it('Scale to options.minHeight', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(320);

expect(img.height).to.be(240);

}, {minHeight: 240})).to.be.ok();

});

it('Scale to options.minWidth but respect options.maxWidth', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(160);

expect(img.height).to.be(120);

}, {minWidth: 240, maxWidth: 160})).to.be.ok();

});

it('Scale to options.minHeight but respect options.maxHeight', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(160);

expect(img.height).to.be(120);

}, {minHeight: 180, maxHeight: 120})).to.be.ok();

});

it('Scale to options.minWidth but respect options.maxHeight', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(160);

expect(img.height).to.be(120);

}, {minWidth: 240, maxHeight: 120})).to.be.ok();

});

it('Scale to options.minHeight but respect options.maxWidth', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(160);

expect(img.height).to.be(120);

}, {minHeight: 180, maxWidth: 160})).to.be.ok();

});

it('Do not scale to max settings without min settings', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(80);

expect(img.height).to.be(60);

}, {maxWidth: 160, maxHeight: 120})).to.be.ok();

});

it('Do not scale to min settings without max settings', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.width).to.be(80);

expect(img.height).to.be(60);

}, {minWidth: 40, minHeight: 30})).to.be.ok();

});

});

describe('Canvas', function () {

it('Return img element to callback if options.canvas is not true', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.getContext).to.not.be.ok();

expect(img.nodeName.toLowerCase()).to.be('img');

})).to.be.ok();

});

it('Return canvas element to callback if options.canvas is true', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.getContext).to.be.ok();

expect(img.nodeName.toLowerCase()).to.be('canvas');

}, {canvas: true})).to.be.ok();

});

it('Return scaled canvas element to callback', function (done) {

expect(loadImage(blob, function (img) {

done();

expect(img.getContext).to.be.ok();

expect(img.nodeName.toLowerCase()).to.be('canvas');

expect(img.width).to.be(40);

expect(img.height).to.be(30);

}, {canvas: true, maxWidth: 40})).to.be.ok();

});

it('Accept a canvas element as parameter for loadImage.scale', function (done) {

expect(loadImage(blob, function (img) {

done();

img = loadImage.scale(img, {

maxWidth: 40

});

expect(img.getContext).to.be.ok();

expect(img.nodeName.toLowerCase()).to.be('canvas');

expect(img.width).to.be(40);

expect(img.height).to.be(30);

}, {canvas: true})).to.be.ok();

});

});

}(

this.expect,

this.loadImage

));