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: / var / canvas / node_modules / gulp-insert / test /
Filename : gulp-insert-test.js
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var insert = require('../'),
    expect = require('chai').expect,
    File = require('gulp-util').File
    Stream = require('readable-stream');

// Helper
function getStreamFromBuffer(string) {
  var stream = new Stream.Readable();
  stream._read = function() {
    stream.push(new Buffer(string));
    stream._read = stream.push.bind(stream, null);
  };
  return stream;
}

describe('Append', function() {
  it('let pass null files through', function(done) {
    var stream = insert.append(' world');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: null
    });

    stream.on('data', function(file) {
      expect(file.contents).to.be.equal(null);
      done();
    });

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

  it('appends the string onto the file in buffer mode', function(done) {
    var stream = insert.append(' world');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: new Buffer('Hello')
    });

    stream.on('data', function(file) {
      expect(file.contents.toString()).to.be.equal('Hello world');
      done();
    });

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

  it('appends the file.path onto the file in buffer mode', function(done) {
    var stream = insert.append(function(file) {
      return file.path;
    });

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: new Buffer('Hello')
    });

    stream.on('data', function(file) {
      expect(file.contents.toString()).to.be.equal('Hello' + file.path);
      done();
    });

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

  it('appends the string onto the file in stream mode', function(done) {
    var stream = insert.append(' world');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: getStreamFromBuffer(new Buffer('Hello'))
    });

    stream.on('data', function(file) {
      var buffers = [];
      file.contents.on('data', function(buf) {
        buffers.push(buf);
      });
      file.contents.on('end', function() {
        expect(Buffer.concat(buffers).toString()).to.be.equal('Hello world');
        done();
      });
    });

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

});

describe('Prepend', function() {
  it('let pass null files through', function(done) {
    var stream = insert.prepend('Hello');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: null
    });

    stream.on('data', function(file) {
      expect(file.contents).to.be.equal(null);
      done();
    });

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

  it('prepends the string onto the file in buffer mode', function(done) {
    var stream = insert.prepend('Hello');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: new Buffer(' world')
    });

    stream.on('data', function(file) {
      expect(file.contents.toString()).to.be.equal('Hello world');
      done();
    });

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

  it('prepends the file.path onto the file in buffer mode', function(done) {
    var stream = insert.prepend(function(file) {
      return file.path;
    });

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: new Buffer(' world')
    });

    stream.on('data', function(file) {
      expect(file.contents.toString()).to.be.equal(file.path + ' world');
      done();
    });

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

  it('prepends the string onto the file in stream mode', function(done) {
    var stream = insert.prepend('Hello');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: getStreamFromBuffer(new Buffer(' world'))
    });

    stream.on('data', function(file) {
      var buffers = [];
      file.contents.on('data', function(buf) {
        buffers.push(buf);
      });
      file.contents.on('end', function() {
        expect(Buffer.concat(buffers).toString()).to.be.equal('Hello world');
        done();
      });
    });

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

describe('Wrap', function() {
  it('let pass null files through', function(done) {
    var stream = insert.wrap('Hello ', '!');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: null
    });

    stream.on('data', function(file) {
      expect(file.contents).to.be.equal(null);
      done();
    });

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

  it('prepends the first argument and appends the second argument in buffer mode', function(done) {
    var stream = insert.wrap('Hello ', '!');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: new Buffer('world')
    });

    stream.on('data', function(file) {
      expect(file.contents.toString()).to.be.equal('Hello world!');
      done();
    });

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

  it('prepends file.base and file.path in buffer mode', function(done) {
    var stream = insert.wrap(function(file) {
      return file.base;
    }, function(file) {
      return file.path;
    });

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: new Buffer('world')
    });

    stream.on('data', function(file) {
      expect(file.contents.toString()).to.be.equal(file.base + 'world' + file.path);
      done();
    });

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

  it('prepends the first argument and appends the second argument in stream mode', function(done) {
    var stream = insert.wrap('Hello ', '!');

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: getStreamFromBuffer(new Buffer('world'))
    });

    stream.on('data', function(file) {
      var buffers = [];
      file.contents.on('data', function(buf) {
        buffers.push(buf);
      });
      file.contents.on('end', function() {
        expect(Buffer.concat(buffers).toString()).to.be.equal('Hello world!');
        done();
      });
    });

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

describe('Transform', function() {
  it('let pass null files through', function(done) {
    var stream = insert.transform(function(data) {
      return data.toUpperCase();
    });

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: null
    });

    stream.on('data', function(file) {
      expect(file.contents).to.be.equal(null);
      done();
    });

    stream.write(fakeFile);
    stream.end();

  });

  it('applys the function to the string in buffer mode', function(done) {
    var stream = insert.transform(function(data) {
      return data.toUpperCase();
    });

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: new Buffer('hello world')
    });

    stream.on('data', function(file) {
      expect(file.contents.toString()).to.be.equal('HELLO WORLD');
      done();
    });

    stream.write(fakeFile);
    stream.end();

  });

  it('applys the function to the string in stream mode', function(done) {
    var stream = insert.transform(function(data) {
      return data.toUpperCase();
    });

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: getStreamFromBuffer(new Buffer('hello world'))
    });

    stream.on('data', function(file) {
      var buffers = [];
      file.contents.on('data', function(buf) {
        buffers.push(buf);
      });
      file.contents.on('end', function() {
        expect(Buffer.concat(buffers).toString()).to.be.equal('HELLO WORLD');
        done();
      });
    });

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

  it('passes the vinyl file object as second parameter in buffer mode', function(done) {

    var stream = insert.transform(function(data, file) {
      var output = [];
      output.push(file.cwd);
      output.push(file.base);
      output.push(file.path);
      output.push(data);

      return output.join('\n');
    });

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: new Buffer('hello world')
    });

    stream.on('data', function(file) {

      var contents = file.contents.toString().split('\n');

      expect(contents.length).to.be.equal(4);
      expect(contents[0]).to.be.equal(__dirname);
      expect(contents[1]).to.be.equal(__dirname + 'test');
      expect(contents[2]).to.be.equal(__dirname + 'test/file.js');
      expect(contents[3]).to.be.equal('hello world');
      done();
    });

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

  it('passes the vinyl file object as second parameter in stream mode', function(done) {

    var stream = insert.transform(function(data, file) {
      var output = [];
      output.push(file.cwd);
      output.push(file.base);
      output.push(file.path);
      output.push(data);

      return output.join('\n');
    });

    var fakeFile = new File({
      cwd: __dirname,
      base: __dirname + 'test',
      path: __dirname + 'test/file.js',
      contents: getStreamFromBuffer(new Buffer('hello world'))
    });

    stream.on('data', function(file) {
      var buffers = [];
      file.contents.on('data', function(buf) {
        buffers.push(buf);
      });
      file.contents.on('end', function() {

        var contents = Buffer.concat(buffers).toString().split('\n');

        expect(contents.length).to.be.equal(4);
        expect(contents[0]).to.be.equal(__dirname);
        expect(contents[1]).to.be.equal(__dirname + 'test');
        expect(contents[2]).to.be.equal(__dirname + 'test/file.js');
        expect(contents[3]).to.be.equal('hello world');
        done();
      });
    });

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