mgraph.events/test/errors.js

Modern eventing library for Node.js and browsers

// test/errors.js
import { test } from 'tap';
import eventify from '../index.js';

test('Eventify protects your object with reserved property', (t) => {
  t.plan(1);
  try {
    eventify({ on: "dummy string" });
    t.fail("Expected error not thrown");
  } catch (e) {
    t.pass("Eventify threw an exception to protect the object");
  }
  t.end();
});

test('Eventify does not allow falsy objects', (t) => {
  t.plan(1);
  try {
    eventify(null);
    t.fail("Expected error not thrown");
  } catch (e) {
    t.pass("Eventify threw an exception for falsy object");
  }
  t.end();
});

test('Eventify does not allow subscribe without a function', (t) => {
  t.plan(1);
  const subject = eventify({});
  try {
    subject.on('foo');
    t.fail("Expected error not thrown");
  } catch (e) {
    t.pass("Eventify threw an exception when no function is provided");
  }
  t.end();
});