fd-gulp-encodingfilter/test/test.js

filt the assigned encoding file

'use strict';

var encodingFilter = require('../');
var should = require('should');
var File = require('gulp-util').File;
var Buffer = require('buffer').Buffer;
var fs = require('fs');
var Readable = require('stream').Readable;
var Path = require('path');

require('mocha');

describe('fd-gulp-encodingFilter', function() {
  describe('encodingFilter()', function() {

    it('should emit error if encoding param is empty', function(done) {   
      try {
        encodingFilter();
        done();
      } catch(err) {
        err.message.should.equal('encoding is empty');
        done();
      }

    });

    it('should emit error for stream files', function(done) {

      var streamFile = {
          isNull: function () { return false; },
          isStream: function () { return true; }
        };

      var stream = encodingFilter('utf-8');

      stream.on('error', function (err) {
          err.message.should.equal('Streaming not supported');
          done();
        });

      stream.write(streamFile);
    });

  	it('should throw error if you except utf-8 but the file\'s encoding is not', function(done) {
        var testDirectory = './source/qingguo';
        var assets = Path.join(testDirectory, 'js/amdtest');
        
        var stream = encodingFilter('utf-8');

        var fileAdata = fs.readFileSync(Path.join(assets, 'hello_world.js'));

        var fileA = new File({
                path: Path.join(assets, 'hello_world.js'),
                contents: fileAdata
            });

        stream.on('end', function() {
        	done();
        });

        try {
          stream.write(fileA);
          stream.end();
          done();
        }catch(err) {
          err.message.should.startWith('STYLE_BUILD_ERR the file encoding should utf-8');
          stream.end();
          done();
        }
        
    });

    it('should throw error if you except gb2312 but the file\'s encoding is not', function(done) {
        var testDirectory = './source/style-m-lofty';
        var assets = Path.join(testDirectory, 'ui/button/1.0');
        
        var stream = encodingFilter('gb2312');

        var fileAdata = fs.readFileSync(Path.join(assets, 'button.less'));

        var fileA = new File({
                path: Path.join(assets, 'button.less'),
                contents: fileAdata
            });

        stream.on('end', function() {
          done();
        });

        try {
          stream.write(fileA);
          stream.end();
          done();
        }catch(err) {
          err.message.should.startWith('STYLE_BUILD_ERR the file encoding should gb2312');
          stream.end();
          done();
        }
        
    });

    it('should pass if you except utf-8 and the file\'s encoding is utf-8', function(done) {
        var testDirectory = './source/style-m-lofty';
        var assets = Path.join(testDirectory, 'ui/button/1.0');
        
        var stream = encodingFilter('utf-8');

        var fileAdata = fs.readFileSync(Path.join(assets, 'button.less'));

        var fileA = new File({
                path: Path.join(assets, 'button.less'),
                contents: fileAdata
            });

        stream.on('end', function() {
          stream.end();
        });

        stream.write(fileA);

        try {
          stream.write(fileA);
          stream.end();
          done();
        }catch(err) {
          err.message.should.equal('');
          stream.end();
          done();
        }
        
    });

    it('should pass if you except gb2312 and the file\'s encoding is gb2312', function(done) {
        var testDirectory = './source/qingguo';
        var assets = Path.join(testDirectory, 'js/app/gongsi/module/filter');
        
        var stream = encodingFilter('gb2312');

        var fileAdata = fs.readFileSync(Path.join(assets, 'area.js'));

        var fileA = new File({
                path: Path.join(assets, 'area.js'),
                contents: fileAdata
            });

        stream.on('end', function() {
          stream.end();
        });

        stream.write(fileA);

        try {
          stream.write(fileA);
          stream.end();
          done();
        }catch(err) {
          err.message.should.equal('');
          stream.end();
          done();
        }
        
    });

  });
});

function stringStream() {
	var stream = new Readable();

	stream._read = function() {
		this.push('terin');
		this.push(null);
	};

	return stream;
}