// Make sure the domain stack is a stack

var assert = require('assert');
var domain = require('domain');

function names(array) {
  return array.map(function(d) {
    return d.name
  }).join(', ');
}

var a = domain.create();
a.name = 'a';
var b = domain.create();
b.name = 'b';
var c = domain.create();
c.name = 'c';

a.enter(); // push
assert.deepEqual(domain._stack, [a],
                 'a not pushed: ' + names(domain._stack));

b.enter(); // push
assert.deepEqual(domain._stack, [a, b],
                 'b not pushed: ' + names(domain._stack));

c.enter(); // push
assert.deepEqual(domain._stack, [a, b, c],
                 'c not pushed: ' + names(domain._stack));

b.exit(); // pop
assert.deepEqual(domain._stack, [a],
                 'b and c not popped: ' + names(domain._stack));

b.enter(); // push
assert.deepEqual(domain._stack, [a, b],
                 'b not pushed: ' + names(domain._stack));