var RevAll = require('./index');
var Revisioner = require('./revisioner');
var Tool = require('./tool');
var Path = require('path');
var gulp = require('gulp');
var Gutil = require('gulp-util');
var es = require('event-stream');

require('should');
require('mocha');


describe('gulp-rev-all', function () {

  var streamRevision, revisioner, files;

  var setup = function (options) {

    streamRevision = RevAll.revision(options);
     streamRevision.on('data', function (file) { 
      revisioner = file.revisioner;
      files = revisioner.files;
    });

  };

   describe('basic usage', function () {

    it('should be able to call all methods', function (done) {

      gulp
        .src(['test/fixtures/config1/**'])
        .pipe(RevAll.revision())
        .pipe(RevAll.versionFile())
        .pipe(es.map(function(file, callback) {
          Path.basename(file.path).should.equal('rev-version.json');
          return callback(null, file);
        }))        
        .pipe(RevAll.manifestFile())
        .pipe(es.map(function(file, callback) {
          Path.basename(file.path).should.equal('rev-manifest.json');
          done();
          return callback(null, file);
        }));
    });

    it('should throw an error when versionFile() is called before revision()', function (done) {

      gulp
        .src(['test/fixtures/config1/**'])
        .pipe(RevAll.versionFile())
        .on('error', function(err) {
          err.message.should.equal('revision() must be called first!');
          done();
        })
        .pipe(es.map(function(file, callback) {
          done('shouldnt get here');
        }));

    });

    it('should throw an error when manifestFile() is called before revision()', function (done) {

      gulp
        .src(['test/fixtures/config1/**'])
        .pipe(RevAll.manifestFile())
        .on('error', function(err) {
          err.message.should.equal('revision() must be called first!');
          done();
        })
        .pipe(es.map(function(file, callback) {
          done('shouldnt get here');
        }));

    });

  });

  describe('resource hash calculation', function () {

    it('should not change on consecutive runs with no changes', function (done) {

      setup();

      streamRevision.on('end', function () {

        var pathBaseline = files['/css/style.css'].path;

        // Re-run the revisioner to re-calculate the filename hash
        revisioner.run();
        files['/css/style.css'].path.should.equal(pathBaseline);

        done();
      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should change if child reference changes', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var pathBaseline = files['/css/style.css'].path;

        // Modify the hash of a dependency
        files['/img/image1.jpg'].revHashOriginal = 'changed';

        // Re-run the revisioner to re-calculate the filename hash
        revisioner.run();
        files['/css/style.css'].path.should.not.equal(pathBaseline);

        done();
      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should change if the prefix changed and it has absolute references', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var pathBaseline = files['/index.html'].path;

        // Apply a prefix to absolute references.
        revisioner.options.prefix = 'http://example.com/';

        // Re-run the revisioner to re-calculate the filename hash
        revisioner.run();
        files['/index.html'].path.should.not.equal(pathBaseline);

        done();
      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    /**
     * Should resolve hash change, both ways
     * Context: https://github.com/smysnk/gulp-rev-all/pull/44
     */
    it('should handle circular reference scenario both ways', function (done) {

      // Increase allowed time, so doesn't timeout on travis-ci
      this.timeout(3000);

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        // Gather baseline paths
        revisioner.run();
        var pathGpsBaseline = files['/view/gps.html'].path;
        var hashGpsBaseline = files['/view/gps.html'].revHashOriginal;

        var pathAboutBaseline = files['/view/about.html'].path;
        var hashAboutBaseline = files['/view/about.html'].revHashOriginal;

        var pathMainBaseline = files['/view/main.html'].path;
        var hashMainBaseline = files['/view/main.html'].revHashOriginal;

        // Change one of the references
        files['/view/gps.html'].revHashOriginal = 'changed';
        revisioner.run();

        // All 3 should have changed
        files['/view/gps.html'].path.should.not.equal(pathGpsBaseline);
        files['/view/about.html'].path.should.not.equal(pathAboutBaseline);
        files['/view/main.html'].path.should.not.equal(pathMainBaseline);

        // Revert back
        files['/view/gps.html'].revHashOriginal = hashGpsBaseline;
        revisioner.run();
        files['/view/gps.html'].path.should.equal(pathGpsBaseline);
        files['/view/about.html'].path.should.equal(pathAboutBaseline);
        files['/view/main.html'].path.should.equal(pathMainBaseline);

        // Try the other reference
        files['/view/main.html'].revHashOriginal = 'changed';
        revisioner.run();

        // All 3 should have changed
        files['/view/gps.html'].path.should.not.equal(pathGpsBaseline);
        files['/view/about.html'].path.should.not.equal(pathAboutBaseline);
        files['/view/main.html'].path.should.not.equal(pathMainBaseline);

        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

  });

  describe('should process images', function () {

    it('should not corrupt them', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var file = files['/img/image1.jpg'];
        file.contents[0].should.equal(255);
        file.contents[1].should.equal(216);
        file.contents[2].should.equal(255);
        file.contents[3].should.equal(224);

        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });
  });

  describe('options:', function () {

    describe('prefix', function () {

      it('should prefix absolute references', function (done) {

        setup({ prefix: 'http://example.com/' });

        streamRevision.on('data', function () { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.match(/'http:\/\/example\.com\/index\.[a-z0-9]{8}\.html'/);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should not prefix relative references', function (done) {

        setup({ prefix: 'http://example.com/' });

        streamRevision.on('data', function () { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.not.match(/"http:\/\/example\.com\/img\/image1\.[a-z0-9]{8}\.jpg"/);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

    });


    describe('filename', function () {

      it('should have proper hash length when specified', function (done) {

        setup({ hashLength: 4 });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          files['/index.html'].path.should.match(/\.[a-z0-9]{4}\.[a-z]{2,4}$/);
          done();

        });

        gulp.src(['test/fixtures/config1/index.html']).pipe(streamRevision);

      });

      it('should be transformed when transform function is specified', function (done) {

        setup({
          dontGlobal: [],
          dontUpdateReference: [],
          dontRenameFile: [],
          transformFilename: function (file, hash) {
            var ext = Path.extname(file.path);
            return hash.slice(0, 5) + '.' + Path.basename(file.path, ext) + ext; // 3410c.glob.ext
          }
        });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          for (var path in files) {
            Path.basename(files[path].path).should.match(/[a-z0-9]{5}\..*\.[a-z]{2,4}$/);
          }
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

    });

    describe('dontGlobal', function () {

      it('should not update favicon.ico reference by default', function (done) {

        setup();

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.not.match(/"favicon\.[a-z0-9]{8}\.ico"/g);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should not update references when specified with file extension', function (done) {

        setup({
          dontGlobal: ['.html']
        });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.not.match(/\.[a-z0-9]{8}\.html/g);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should not update references when specified with file regex', function (done) {

        setup({
          dontGlobal: [ /.html$/g ]
        });

        streamRevision.on('data', function (file) {});
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.not.match(/\.[a-z0-9]{8}\.html/g);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should not rename when specified with files extension', function (done) {

        setup({
          dontGlobal: ['.js']
        });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.match(/\"[a-z0-9\/]*\.js\"/);
          done();

        });
        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);


      });

      it('should not rename when specified with files extension', function (done) {

        setup({
          dontGlobal: [ /.js$/g ]
        });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.match(/\"[a-z0-9\/]*\.js\"/);
          done();

        });
        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);


      });

    });


    describe('dontRenameFile', function () {

      it('should rename nested index', function (done) {

        setup({
          dontRenameFile: [ /^\/index.html/g ]
        });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          files['/nested/index.html'].path.should.not.match(/\/nested\/index\.html$/);
          files['/index.html'].path.should.not.match(/index\.[a-z0-9]{8}\.html$/);

          done();

        });
        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should not rename html files when specified', function (done) {

        setup({
          dontRenameFile: ['.html']
        });

        streamRevision.on('data', function (file) {
          Path.basename(file.path).should.not.match(/\.[a-z0-9]{8}\.html$/);
        });

        streamRevision.on('end', done);
        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should still process and re-write references in a dontRenameFile file', function (done) {

        setup({
          dontRenameFile: ['.html']
        });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.match(/[a-z0-9]*\.[a-z0-9]{8}\.[a-z]{2,4}/);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

    });

    describe('dontUpdateReference', function () {

      it('should not update reference when specified with file extension', function (done) {

        setup({
          dontUpdateReference: ['.html']
        });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.not.match(/\.[a-z0-9]{8}\.html/g);
          String(files['/index.html'].contents).should.match(/\.[a-z0-9]{8}\.jpg/g);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should not update reference when specified with file regex', function (done) {

        setup({
          dontUpdateReference: [ /.html$/g ]
        });

        streamRevision.on('data', function (file) {});
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.not.match(/\.[a-z0-9]{8}\.html/g);
          String(files['/index.html'].contents).should.match(/\.[a-z0-9]{8}\.jpg/g);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

    });

    describe('dontSearchFile', function () {

      it('should not update reference when specified with file extension', function (done) {

        setup({
          dontSearchFile: ['.html']
        });

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.not.match(/\.[a-z0-9]{8}\./g);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should not update reference when specified with file regex', function (done) {

        setup({
          dontSearchFile: [ /.html$/g ]
        });

        streamRevision.on('data', function (file) {});
        streamRevision.on('end', function () {

          String(files['/index.html'].contents).should.not.match(/\.[a-z0-9]{8}\./g);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

    });

  });

  describe('globbing', function () {

    describe('multiple globs', function () {

      it('should set base to common directory', function (done) {

        setup();

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          revisioner.pathBase.should.match(/\/test\/fixtures\/config1\/$/g);
          done();

        });

        gulp.src(['test/fixtures/config1/script/**', 'test/fixtures/config1/lib/**']).pipe(streamRevision);

      });

      it('should resolve references correctly', function (done) {

        setup();

        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          String(files['/script/main.js'].contents).should.containEql(Path.basename(files['/lib/angular.js'].revFilename, files['/lib/angular.js'].revFilenameExtOriginal));
          done();

        });

        gulp.src(['test/fixtures/config1/script/**', 'test/fixtures/config1/lib/**']).pipe(streamRevision);

      });

    });

  });

  describe('root html', function () {

    it('should resolve absolute path reference', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        String(files['/index.html'].contents).should.match(/'\/index\.[a-z0-9]{8}\.html'/);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should replaced references using transform if it is supplied', function (done) {

      setup({
        transformPath: function (reved, source, path) {
          return this.Tool.join_path_url('//images.example.com/', reved.replace('img/', ''));
        }
      });

      streamRevision.on('data', function () {});
      streamRevision.on('end', function () {

        String(files['/index.html'].contents).should.match(/\/\/images\.example\.com\/image1\.[a-z0-9]{8}\.jpg/);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should resolve reference to css', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        String(files['/index.html'].contents).match(/\/css\/style\.[a-z0-9]{8}\.css/g);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should resolve reference reference to angularjs view', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        String(files['/index.html'].contents).match(/\/view\/main\.[a-z0-9]{8}\.html/g);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });


    it('should resolve reference reference to javascript include', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        String(files['/index.html'].contents).match(/"\/script\/main\.[a-z0-9]{8}\.js"/g);
        String(files['/index.html'].contents).match(/"\/lib\/require\.[a-z0-9]{8}\.js"/g);

        done();
      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });


    it('should resolve reference in double quotes', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        String(files['/index.html'].contents).match(/"\/img\/image1\.[a-z0-9]{8}\.jpg"/g);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);
    });

    it('should resolve reference in single quotes', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        String(files['/index.html'].contents).match(/'\/img\/image2\.[a-z0-9]{8}\.jpg'/g);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);
    });

    it('should replace srcset referencess', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        var count = String(files['/index.html'].contents).match(/image-[0-4]x\.[a-z0-9]{8}\.png/g);
        count.length.should.eql(4);

        done();
      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);
    });

    it('should replace multiple occurances of the same reference', function (done) {

      setup();

      streamRevision.on('data', function () {  });
      streamRevision.on('end', function () {

        var count = String(files['/index.html'].contents).match(/img\/image3\.[a-z0-9]{8}\.jpg/g);
        count.length.should.eql(2);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);
    });

  });

  describe('nested html', function () {

    it('should prioritize relative refereference', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        var hashRelative = files['/nested/config.js'].revFilename;
        var hashAbsolute = files['/config.js'].revFilename;

        var contents = String(files['/nested/index.html'].contents);
        contents.should.containEql(hashRelative);
        contents.should.not.containEql(hashAbsolute);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should resolve both relative and absolute references correctly', function (done) {

      setup();

      streamRevision.on('data', function () { });
      streamRevision.on('end', function () {

        var hashRelative = files['/nested/index.html'].revFilename;
        var hashAbsolute = files['/index.html'].revFilename;

        var contents = String(files['/nested/index.html'].contents);
        contents.should.containEql(hashRelative);
        contents.should.containEql(hashAbsolute);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

  });

  describe('angularjs view', function () {

    it('should resolve references to images', function (done) {

      setup();

      streamRevision.on('data', function () {  });
      streamRevision.on('end', function () {

        var count = String(files['/view/main.html'].contents).match(/\.[a-z0-9]{8}\.jpg/g);
        count.length.should.eql(1);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);
    });

    it('should resolve references to angular includes', function (done) {

      setup();

      streamRevision.on('data', function () {  });
      streamRevision.on('end', function () {

        var count = String(files['/view/main.html'].contents).match(/view\/core\/footer\.[a-z0-9]{8}\.html/g);
        count.length.should.eql(1);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

  });

  describe('css', function () {

    it('should resolve references to fonts', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var contents = String(files['/css/style.css'].contents);

        contents.should.containEql(files['/font/font1.eot'].revFilename);
        contents.should.containEql(files['/font/font1.woff'].revFilename);
        contents.should.containEql(files['/font/font1 space.ttf'].revFilename);
        contents.should.containEql(files['/font/font1.svg'].revFilename);

        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should resolve references to images', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var contents = String(files['/css/style.css'].contents);

        contents.should.containEql(files['/img/image1.jpg'].revFilename);
        contents.should.containEql(files['/img/image2.jpg'].revFilename);

        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);
    });


  });

  describe('reference resolution', function () {

    it('should resolve references when base is specified', function (done) {

      streamRevision = RevAll.revision({
        prefix: 'http://cdn.com/',
        dontGlobal: [/\/favicon\.ico$/],
        dontRenameFile: [/\.html$/]
      });

      streamRevision.on('data', function (file) { 
        revisioner = file.revisioner;
        files = revisioner.files;        
      });
      
      streamRevision.on('end', function () {

        String(files['/view/main.html'].contents).should.match(/"http:\/\/cdn\.com\/css\/style\.[a-z0-9]{8}\.css"/);
        done();

      });

      gulp.src([
        'test/fixtures/config1/view/**',
        'test/fixtures/config1/font/**',
        'test/fixtures/config1/img/**',
        'test/fixtures/config1/script/app.js',
        'test/fixtures/config1/css/style.css'
      ], {
        base: 'test/fixtures/config1'
      }).pipe(streamRevision);

    });

    it('should not add .js to short references', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var contents = String(files['/script/app.js'].contents);
        contents.should.not.containEql('var short = require(' + files['/script/short.js'].revFilename + ');');
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should not resolve arbitrary text with the same name as a file', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var contents = String(files['/script/app.js'].contents);
        contents.should.not.containEql('var ' + files['/script/short.js'].revFilename);
        contents.should.not.containEql('function (' + files['/script/app.js'].revFilename + ')');
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should resolve references to regular commonjs include', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var contents = String(files['/script/app.js'].contents);
        contents.should.containEql(files['/script/layout.js'].revFilename);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should resolve references to short style commonjs include', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var contents = String(files['/script/app.js'].contents);

        // Rebuild include as we should expect it, eg.  require('./short.abcdef');
        var reference = './' + files['/script/short.js'].revFilename.substr(0, files['/script/short.js'].revFilename.length - 3);
        contents.should.containEql(reference);

        reference = './' + files['/script/shortDuplicate.js'].revFilename.substr(0, files['/script/shortDuplicate.js'].revFilename.length - 3);
        contents.should.containEql(reference);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });


    it('should resolve references to angularjs views', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var contents = String(files['/script/app.js'].contents);
        contents.should.containEql(files['/view/gps.html'].revFilename);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    it('should resolve references in angularjs inline templates', function (done) {

      setup();

      streamRevision.on('data', function (file) { });
      streamRevision.on('end', function () {

        var contents = String(files['/script/app.js'].contents);
        contents.should.containEql(files['/img/image1.jpg'].revFilename);
        done();

      });

      gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

    });

    describe('source map', function () {

      it('should resolve reference with spaces after map statement', function (done) {

        setup();


        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          var contents = String(files['/script/app.js'].contents);
          contents.should.containEql('//# sourceMappingURL=' + files['/script/app.js.map'].revFilename);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

      it('should resolve reference with no characters after map statement', function (done) {

        setup();


        streamRevision.on('data', function (file) { });
        streamRevision.on('end', function () {

          var contents = String(files['/script/no_space_after_map.js'].contents);
          contents.should.containEql('//# sourceMappingURL=' + files['/script/no_space_after_map.js.map'].revFilename);
          done();

        });

        gulp.src(['test/fixtures/config1/**']).pipe(streamRevision);

      });

    });

  });


  describe('Tool', function () {

    describe('joinPath', function () {

      describe('windows', function () {

        it('should correct slashes', function () {

          Tool.join_path('d:\\first\\second', 'images.png').should.equal('/first/second/images.png');

        });

        it('should not add starting slash', function () {

          Tool.join_path('first\\second', 'images.png').should.equal('first/second/images.png');

        });

      });

      describe('posix', function () {

        it('should correct slashes', function () {

          Tool.join_path('/first/second', 'images.png').should.equal('/first/second/images.png');

        });

        it('should not add starting slash', function () {

          Tool.join_path('first/second', 'images.png').should.equal('first/second/images.png');

        });

      });

    });

    describe('get_relative_path', function () {

      it('should only truncate paths that overap with the base', function () {

        Tool.get_relative_path('/base/', 'sub/index.html').should.equal('sub/index.html');
        Tool.get_relative_path('/base/', '/sub/index.html').should.equal('/sub/index.html');
        Tool.get_relative_path('/base/', '/base/sub/index.html').should.equal('/sub/index.html');

      });

      describe('windows', function () {

        it('should correct slashes', function () {

          Tool.get_relative_path('c:\\base', 'c:\\base\\sub\\index.html').should.equal('/sub/index.html');
          Tool.get_relative_path('c:\\base\\', 'c:\\base\\sub\\index.html').should.equal('/sub/index.html');

        });

        it('should remove starting slash', function () {

          Tool.get_relative_path('d:\\base', 'd:\\base\\sub\\index.html', true).should.equal('sub/index.html');
          Tool.get_relative_path('d:\\base\\', 'd:\\base\\sub\\index.html', true).should.equal('sub/index.html');

        });

        it('should work on base', function () {

          Tool.get_relative_path('e:\\base\\sub', 'e:\\base\\sub\\index.html', true).should.equal('index.html');
          Tool.get_relative_path('e:\\base\\sub\\', 'e:\\base\\sub\\index.html', true).should.equal('index.html');

        });


      });

      describe('posix', function () {

        it('should correct slashes', function () {

          Tool.get_relative_path('/base/', '/base/sub/index.html').should.equal('/sub/index.html');
          Tool.get_relative_path('/base', '/base/sub/index.html').should.equal('/sub/index.html');

        });

        it('should remove starting slash', function () {

          Tool.get_relative_path('/base/', '/base/sub/index.html', true).should.equal('sub/index.html');
          Tool.get_relative_path('/base', '/base/sub/index.html', true).should.equal('sub/index.html');

        });


        it('should work on base', function () {

          Tool.get_relative_path('/base/sub/', '/base/sub/index.html', true).should.equal('index.html');
          Tool.get_relative_path('/base/sub', '/base/sub/index.html', true).should.equal('index.html');

        });

      });

    });

    describe('get_reference_representations', function () {

      describe('_relative', function () {

        describe('producing alternate representations for javascript (without the extension)', function () {

          it('should not when the context is a html file', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/script.js',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('script.js');
            references[1].should.equal('./script.js');

          });

          it('should when the context is a javascript file', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/other.js',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/script.js',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('script.js');
            references[1].should.equal('./script.js');

          });

        });

        describe('should resolve references that have 0 traversals', function () {

          it('0 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/other.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('other.html');
            references[1].should.equal('./other.html');

          });

          it('1 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/fourth/other.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('fourth/other.html');
            references[1].should.equal('./fourth/other.html');      

          });

          if (/^win/.test(process.platform)) {
            it('windows path', function () {

              var base = 'c:\\first\\second';

              var file = new Gutil.File({
                path: 'c:\\first\\second\\third\\index.html',
                base: base
              });

              var fileReference = new Gutil.File({
                path: 'c:\\first\\second\\third\\fourth\\other.html',
                base: base
              });

              file.revPathOriginal = file.path;
              fileReference.revPathOriginal = fileReference.path;

              var references = Tool.get_reference_representations_relative(fileReference, file);

              references.length.should.equal(2);
              references[0].should.equal('fourth/other.html');
              references[1].should.equal('./fourth/other.html');

            });
          }

        });

        describe('should resolve references that have 1 traversals', function () {

          it('0 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(1);
            references[0].should.equal('../index.html');

          });

          it('1 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/other/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(1);
            references[0].should.equal('../other/index.html');

          });

          it('1 deep to similar directory', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/thirder/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(1);
            references[0].should.equal('../thirder/index.html');

          });

          it('2 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/other/advanced/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(1);
            references[0].should.equal('../other/advanced/index.html');

          });

        });

        describe('should resolve references that have 2 traversals', function () {

          it('0 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/fourth/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(1);
            references[0].should.equal('../../index.html');

          });

          it('1 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/fourth/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/other/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(1);
            references[0].should.equal('../../other/index.html');

          });

          it('2 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/fourth/fifth/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/other/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_relative(fileReference, file);

            references.length.should.equal(1);
            references[0].should.equal('../../../other/index.html');

          });

        });

      });

      describe('_absolute', function () {

        describe('producing alternate representations for javascript (without the extension)', function () {

          it('should not when the context is a html file', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/script.js',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/third/script.js');
            references[1].should.equal('third/script.js');

          });

          it('should when the context is a javascript file', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/other.js',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/script.js',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/third/script.js');
            references[1].should.equal('third/script.js');

          });

        });

        describe('should resolve references that have 0 traversals', function () {

          it('0 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/other.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/third/other.html');
            references[1].should.equal('third/other.html');

          });

          it('1 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/fourth/other.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/third/fourth/other.html');
            references[1].should.equal('third/fourth/other.html');

          });

        });

        describe('should resolve references that have 1 traversals', function () {

          it('0 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/index.html');
            references[1].should.equal('index.html');

          });

          it('1 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/other/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/other/index.html');
            references[1].should.equal('other/index.html');

          });

          it('1 deep to similar directory', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/thirder/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/third/index.html');
            references[1].should.equal('third/index.html');

          });

          it('2 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/other/advanced/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/other/advanced/index.html');
            references[1].should.equal('other/advanced/index.html');

          });

        });

        describe('should resolve references that have 2 traversals', function () {

          it('0 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/fourth/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/index.html');
            references[1].should.equal('index.html');

          });

          it('1 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/fourth/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/other/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/other/index.html');
            references[1].should.equal('other/index.html');

          });

          it('2 deep', function () {

            var base = '/first/second';

            var file = new Gutil.File({
              path: '/first/second/third/fourth/fifth/index.html',
              base: base
            });

            var fileReference = new Gutil.File({
              path: '/first/second/other/index.html',
              base: base
            });

            file.revPathOriginal = file.path;
            fileReference.revPathOriginal = fileReference.path;

            var references = Tool.get_reference_representations_absolute(fileReference, file);

            references.length.should.equal(2);
            references[0].should.equal('/other/index.html');
            references[1].should.equal('other/index.html');

          });

        });

      });

    });

  });

});