Added result-collector; Relates to #48
Christoph Oberhofer
10 years ago
parent
e142350863
commit
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define(['result_collector', 'image_debug'], function(ResultCollector, ImageDebug) {
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var canvasMock,
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imageSize,
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config;
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beforeEach(function() {
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imageSize = {x: 320, y: 240};
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config = {
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capture: true,
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capacity: 20,
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blacklist: [{code: "3574660239843", format: "ean_13"}],
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filter: function(codeResult) {
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return true;
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}
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};
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canvasMock = {
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getContext: function() {
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return {};
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},
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toDataURL: sinon.spy(),
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width: 0,
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height: 0
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};
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sinon.stub(document, "createElement", function(type) {
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if (type === "canvas") {
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return canvasMock;
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}
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});
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});
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afterEach(function() {
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document.createElement.restore();
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});
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describe('create', function () {
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it("should return a new collector", function() {
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ResultCollector.create(config);
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expect(document.createElement.calledOnce).to.be.equal(true);
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expect(document.createElement.getCall(0).args[0]).to.equal("canvas");
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});
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});
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describe('addResult', function() {
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beforeEach(function() {
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sinon.stub(ImageDebug, "drawImage", function() {});
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});
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afterEach(function() {
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ImageDebug.drawImage.restore();
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});
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it("should not add result if capacity is full", function(){
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config.capacity = 1;
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var collector = ResultCollector.create(config);
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collector.addResult([], imageSize, {});
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collector.addResult([], imageSize, {});
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collector.addResult([], imageSize, {});
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expect(collector.getResults()).to.have.length(1);
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});
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it("should only add results which match constraints", function(){
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var collector = ResultCollector.create(config),
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results;
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collector.addResult([], imageSize, {code: "423423443", format: "ean_13"});
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collector.addResult([], imageSize, {code: "3574660239843", format: "ean_13"});
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collector.addResult([], imageSize, {code: "3574660239843", format: "code_128"});
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results = collector.getResults();
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expect(results).to.have.length(2);
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results.forEach(function(result) {
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expect(result).not.to.deep.equal(config.blacklist[0]);
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});
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});
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it("should add result if no filter is set", function() {
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delete config.filter;
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var collector = ResultCollector.create(config);
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collector.addResult([], imageSize, {code: "423423443", format: "ean_13"});
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expect(collector.getResults()).to.have.length(1);
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});
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it("should not add results if filter returns false", function() {
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config.filter = function(){ return false };
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var collector = ResultCollector.create(config);
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collector.addResult([], imageSize, {code: "423423443", format: "ean_13"});
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expect(collector.getResults()).to.have.length(0);
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});
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it("should add result if no blacklist is set", function() {
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delete config.blacklist;
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var collector = ResultCollector.create(config);
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collector.addResult([], imageSize, {code: "3574660239843", format: "ean_13"});
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expect(collector.getResults()).to.have.length(1);
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});
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});
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});
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@ -0,0 +1,59 @@
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/* jshint undef: true, unused: true, browser:true, devel: true */
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/* global define */
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define(["image_debug"], function(ImageDebug) {
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"use strict";
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function contains(codeResult, list) {
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if (list) {
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return list.some(function (item) {
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return Object.keys(item).every(function (key) {
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return item[key] === codeResult[key];
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});
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});
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}
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return false;
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}
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function passesFilter(codeResult, filter) {
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if (typeof filter === 'function') {
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return filter(codeResult);
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}
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return true;
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}
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return {
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create: function(config) {
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var canvas = document.createElement("canvas"),
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ctx = canvas.getContext("2d"),
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results = [],
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capacity = config.capacity || 20,
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capture = config.capture === true;
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function matchesConstraints(codeResult) {
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return capacity && codeResult && !contains(codeResult, config.blacklist) && passesFilter(codeResult, config.filter);
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}
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return {
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addResult: function(data, imageSize, codeResult) {
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var result = {};
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if (matchesConstraints(codeResult)) {
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capacity--;
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result.codeResult = codeResult;
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if (capture) {
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canvas.width = imageSize.x;
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canvas.height = imageSize.y;
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ImageDebug.drawImage(data, imageSize, ctx);
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result.frame = canvas.toDataURL();
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}
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results.push(result);
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}
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},
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getResults: function() {
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return results;
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}
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};
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}
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};
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});
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