// Mini test suite for our custom error

var assert = require('assert');
var CustomError = require('./errors/custom-error');

function doSomethingBad() {
  throw new CustomError('It went bad!', 42);
}

try {
  doSomethingBad();
} catch (err) {
  // The name property should be set to the error's name
  assert(err.name = 'CustomError');

  // The error should be an instance of its class
  assert(err instanceof CustomError);

  // The error should be an instance of builtin Error
  assert(err instanceof Error);

  // The error should be recognized by Node.js' util#isError
  assert(require('util').isError(err));

  // The error should have recorded a stack
  assert(err.stack);

  // toString should return the default error message formatting
  assert.strictEqual(err.toString(),
                     'CustomError: It went bad!');

  // The stack should start with the default error message formatting
  assert.strictEqual(err.stack.split('\n')[0],
                     'CustomError: It went bad!');

  // The first stack frame should be the function where the error was thrown.
  assert.strictEqual(err.stack.split('\n')[1].indexOf('doSomethingBad'), 7);

  // The extra property should have been set
  assert.strictEqual(err.extra, 42);
}

// Spoiler: It passes!