smime signer code

code.js

  it('should create a new root MIME node with children2', (done) => {
    const message = new MimeNode('multipart/mixed');
    message.setHeader({
      from: 'Example user <user@example.com>',
      to: 'Example recipient <recipient@example.com>',
      subject: 'Example message',
    });
    const textNode = message.createChild('text/plain');
    textNode.setContent('Example\nmessage');
    mail = { message };
    plugin(mail, (err) => {
      if (err) {
        return done(err);
      }
      expect(mail.message.getHeader('Content-Type')).to.match(/multipart\/signed/);
      expect(mail.message.childNodes).to.be.an('array');
      mail.message.build(function(err, message){
        fs.writeFileSync(path.join(__dirname, 'out.email'), message, 'binary')
      });
      done();
    });
  });
  it('should create a new root MIME node with children3', (done) => {
    var mailOptions = {
      from: 'Example user <user@example.com>',
      to: 'Example recipient <recipient@example.com>',
      subject: 'Example message',
      text: 'Example\nmessage',
    };
    const MailComposer = require("nodemailer/lib/mail-composer");
    mail = new MailComposer(mailOptions);
    mail.compile()
    plugin(mail, (err) => {
      if (err) {
        return done(err);
      }
      expect(mail.message.getHeader('Content-Type')).to.match(/multipart\/signed/);
      expect(mail.message.childNodes).to.be.an('array');
      mail.message.build(function(err, message){
        fs.writeFileSync(path.join(__dirname, 'out2.email'), message, 'binary')
      });
      done();
    });
  });
  it('should create a new root MIME node with children4', (done) => {
    var mailOptions = {
      from: 'Example user <user@example.com>',
      to: 'Example recipient <recipient@example.com>',
      subject: 'Example message',
      text: 'Example\nmessage',
      html: 'asd'
    };
    const MailComposer = require("nodemailer/lib/mail-composer");
    mail = new MailComposer(mailOptions);
    mail.compile()
    plugin(mail, (err) => {
      if (err) {
        return done(err);
      }
      expect(mail.message.getHeader('Content-Type')).to.match(/multipart\/signed/);
      expect(mail.message.childNodes).to.be.an('array');
      mail.message.build(function(err, message){
        fs.writeFileSync(path.join(__dirname, 'out3.email'), message, 'binary')
      });
      done();
    });
  });