taperr      

fire once. tape error events for t.fail(msg)

t.fail(msg)

• tape's deliberate failure mechanism uses a normal style data message signature
• you can fit t.fail flat into an EventEmitter's callback spot
• organize intentional error handlers triggered in tests.
• clean up unconscionable promise APIs:
  • normalize handlers given as the second error callback to .then() scenarios.
• to find and report uncaught errors, you're probably looking for tape-catch

install:

$ npm i taperr

basic idea:

require('taperr').once( 'error', t.fail )
 
//call `.err(er){ }` to raise 'error' events
require('taperr').err
 
//the implicit parameter gets passed to t.fail( err ), lighting up a tape console

example:

require('tape')('headless osx chromedriver', function (t) {
  t.test('selenium-webdriver basic api interoperability', function (t) {
 
    t.plan(2);
 
    var webdriver = require('selenium-webdriver')
    var driver = new webdriver.Builder()
      .usingServer('http://127.0.0.1:4444/wd/hub')
      .withCapabilities(webdriver.Capabilities.chrome())
      .build();
 
    require('taperr').once( 'error', t.fail );
 
    t.ok( driver.get('https://endpoint.what'), 'loaded endpoint' );
 
    driver.findElement( webdriver.By.id( 'username' ) ).then(function (el) {
      t.ok( el.sendKeys('selenium'), 'username: selenium' );
    }, require('taperr').err );
 
    driver.quit().then(function(){
      process.exit(0);
    }, require('taperr').err );
  });
});

test:

$ npm t