gulp-svgmin/test.js

Minify SVG files with gulp.

/* jshint node: true */
/* global describe, it */

'use strict';

var expect = require('chai').expect,
    gutil  = require('gulp-util'),
    svgmin = require('./index'),
    es = require('event-stream'),
    Stream = require('stream');

var doctype = '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">';

var raw = '<?xml version="1.0" encoding="utf-8"?>' + doctype +
'<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve">' +
'<circle cx="50" cy="50" r="40" fill="yellow" /><!-- test comment -->' +
'</svg>';

var compressed = '<svg xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" fill="#ff00"/></svg>';

describe('gulp-svgmin', function() {

    describe('with null contents', function() {

        it('should let null files pass through', function(done) {

            var s = svgmin(),
                n = 0;
            s.pipe(es.through(function(file) {
                  expect(file.path).to.equal('bibabelula.md');
                  expect(file.contents).to.equal(null);
                  n++;
              }, function() {
                  expect(n).to.equal(1);
                  done();
              }));
            s.write(new gutil.File({
                path: 'bibabelula.md',
                contents: null
            }));
            s.end();

        });
    });

    describe('in buffer mode', function() {

        it('should minify svg with svgo', function(cb) {
            var stream = svgmin();

            stream.on('data', function(data) {
                expect(String(data.contents)).to.equal(compressed);
                cb();
            });

            stream.write(new gutil.File({
                contents: new Buffer(raw)
            }));
        });

        it('should honor disabling plugins, such as keeping the doctype', function(cb) {
            var stream = svgmin([{
                removeDoctype: false
            }]);

            stream.on('data', function(data) {
                expect(String(data.contents)).to.have.string(doctype);
                cb();
            });

            stream.write(new gutil.File({
                contents: new Buffer(raw)
            }));
        });

        it('should allow disabling multiple plugins', function(cb) {
            var stream = svgmin([{
                removeDoctype: false
            }, {
                removeComments: false
            }]);

            stream.on('data', function(data) {
                expect(String(data.contents)).to.have.string(doctype).and.to.have.string('test comment');
                cb();
            });

            stream.write(new gutil.File({
                contents: new Buffer(raw)
            }));
        });

    });

    describe('stream mode', function() {
        it('should minify svg with svgo', function(cb) {
            var stream = svgmin();
            var fakeFile = new gutil.File({
                contents: new Stream()
            });
        
            stream.on('data', function(data) {
                data.contents.pipe(es.wait(function(err, data) {
                    expect(data).to.equal(compressed);
                    cb();
                }));
            });
        
            stream.write(fakeFile);
            fakeFile.contents.write(raw);
            fakeFile.contents.end();
        });
        
        it('should honor disabling plugins, such as keeping the doctype', function(cb) {
            var stream = svgmin([{
                removeDoctype: false
            }]);
            var fakeFile = new gutil.File({
                contents: new Stream()
            });
        
            stream.on('data', function(data) {
                data.contents.pipe(es.wait(function(err, data) {
                    expect(data).to.have.string(doctype);
                    cb();
                }));
            });
        
            stream.write(fakeFile);
            fakeFile.contents.write(raw);
            fakeFile.contents.end();
        });

        it('should allow disabling multiple plugins', function(cb) {
            var stream = svgmin([{
                removeDoctype: false
            }, {
                removeComments: false
            }]);

            var fakeFile = new gutil.File({
                contents: new Stream()
            });

            stream.on('data', function(data) {
                data.contents.pipe(es.wait(function(err, data) {
                    expect(data).to.have.string(doctype).and.to.have.string('test comment');
                    cb();
                }));
            });

            stream.write(fakeFile);
            fakeFile.contents.write(raw);
            fakeFile.contents.end();
        });
    });
});