phantomjssmith/test/phantomjssmith_test.js

PhantomJS engine for spritesmith

// Load in dependencies
var concat = require('concat-stream');
var expect = require('chai').expect;
var spritesmithEngineTest = require('spritesmith-engine-test');
var Phantomjssmith = require('../');

// Start the normal test
spritesmithEngineTest.run({
  engine: Phantomjssmith,
  engineName: 'phantomjssmith',
  tests: {
    // Disable buffer/stream tests since they are warnings only and we don't use contents
    renderPngBufferVinylCanvas: false,
    renderPngStreamVinylCanvas: false,
    // Disable GIF test as we don't support it currently
    renderGifCanvas: false
  }
});

// Define phantomjssmith specific tests
var testUtils = spritesmithEngineTest.spritesmithUtils;
describe('phantomjssmith', function () {
  describe('running against very long URLs', function () {
    // Set up canvas for test case
    var multiplePngImages = spritesmithEngineTest.config.multiplePngImages;
    testUtils.createEngine(Phantomjssmith);
    testUtils.interpretStringImages(multiplePngImages.filepaths);
    testUtils._createCanvas(multiplePngImages.width, multiplePngImages.height);
    testUtils._addImages(multiplePngImages.coordinateArr);

    // Run export with excessive meta data
    before(function exportWithLongMetadata (done) {
      // Generate a long string (looooooong)
      // https://github.com/twolfson/phantomjssmith/issues/3
      // DEV: Unfortunately, this test doesn't reproduce the issue on Linux
      var longStr = 'l';
      var i = 71663;
      while (i--) {
        longStr += 'o';
      }
      longStr += 'ng';

      // Export canvas with way too much meta data
      var that = this;
      var resultStream = this.canvas['export']({format: 'png', longStr: longStr});
      resultStream.on('error', done);
      resultStream.pipe(concat(function handleResult (result) {
        that.result = result;
        done();
      }));
    });
    after(function cleanupExport () {
      delete this.result;
    });

    it('does not crash', function () {
      // Would have thrown
    });
    it('returns an image', function () {
      expect(this.result).to.not.equal('');
    });
  });

  describe('with a custom timeout', function () {
    // Set up canvas for test case
    var multiplePngImages = spritesmithEngineTest.config.multiplePngImages;
    testUtils.createEngine(Phantomjssmith);
    testUtils.interpretStringImages(multiplePngImages.filepaths);
    testUtils._createCanvas(multiplePngImages.width, multiplePngImages.height);
    testUtils._addImages(multiplePngImages.coordinateArr);

    // Run export with short timeout
    before(function exportWithShortTimeout (done) {
      var that = this;
      var resultStream = this.canvas['export']({format: 'png', timeout: 1});
      resultStream.on('error', function saveError (err) {
        that.err = err;
        done();
      });
      resultStream.on('end', done);
    });
    after(function cleanupResults () {
      delete this.err;
    });

    it('times out very easily', function () {
      expect(this.err.message).to.contain('Timing out script.');
      expect(this.err.message).to.not.contain('Error while parsing JSON');
    });
  });
});