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image.test.js
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image.test.js
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/**
* Module dependencies.
*/
var Canvas = require('canvas')
, Image = Canvas.Image
, assert = require('assert');
var png = __dirname + '/fixtures/clock.png';
module.exports = {
'tset Image': function(){
assert.ok(Image instanceof Function);
},
'test Image#onload': function(beforeExit){
var img = new Image
, n = 0;
assert.strictEqual(false, img.complete);
img.onload = function(){
++n;
assert.equal(img.src, png);
};
img.src = png;
assert.equal(img.src, png);
beforeExit(function(){
assert.equal(img.src, png);
assert.strictEqual(true, img.complete);
assert.strictEqual(320, img.width);
assert.strictEqual(320, img.height);
assert.equal(1, n);
});
},
'test Image#onerror': function(beforeExit){
var img = new Image
, error
, n = 0;
assert.strictEqual(false, img.complete);
img.onload = function(){
assert.fail('called onload');
};
img.onerror = function(err){
++n;
error = err;
};
try {
img.src = png + 's';
} catch (err) {
assert.fail('error did not invoke onerror(): ' + err);
}
assert.equal(img.src, png + 's');
beforeExit(function(){
assert.ok(error instanceof Error, 'did not invoke onerror() with error');
assert.strictEqual(false, img.complete);
assert.equal(1, n);
});
},
'test Image#{width,height}': function(beforeExit){
var img = new Image
, n = 0;
assert.strictEqual(0, img.width);
assert.strictEqual(0, img.height);
img.onload = function(){
++n;
assert.strictEqual(320, img.width);
assert.strictEqual(320, img.height);
};
img.src = png;
beforeExit(function(){
assert.equal(1, n);
});
}
};