amqp-node/test/bitset.js

An AMQP 0-9-1 (e.g., RabbitMQ) library and client.

'use strict';

var claire = require('claire');

var forAll = claire.forAll,
  arb = claire.data,
  label = claire.label,
  choice = claire.choice,
  transform = claire.transform;

var BitSet = require('../lib/bitset').BitSet;
var PosInt = transform(Math.floor, arb.Positive);

var EmptyBitSet = label('bitset', transform(
  function (size) {
    return new BitSet(size);
  },
  choice(arb.Nothing, PosInt)));

describe('BitSet', function () {

  it('get bit', forAll(EmptyBitSet, PosInt)
    .satisfy(function (b, bit) {
      b.set(bit);
      return b.get(bit);
    }).asTest());

  it('clear bit', forAll(EmptyBitSet, PosInt)
    .satisfy(function (b, bit) {
      b.set(bit);
      b.clear(bit);
      return !b.get(bit);
    }).asTest());

  it('next set of empty', forAll(EmptyBitSet)
    .satisfy(function (b) {
      return b.nextSetBit(0) === -1;
    }).asTest());

  it('next set of one bit', forAll(EmptyBitSet, PosInt)
    .satisfy(function (b, bit) {
      b.set(bit);
      return b.nextSetBit(0) === bit;
    }).asTest());

  it('next set same bit', forAll(EmptyBitSet, PosInt)
    .satisfy(function (b, bit) {
      b.set(bit);
      return b.nextSetBit(bit) === bit;
    }).asTest());

  it('next set following bit', forAll(EmptyBitSet, PosInt)
    .satisfy(function (b, bit) {
      b.set(bit);
      return b.nextSetBit(bit + 1) === -1;
    }).asTest());

  it('next clear of empty', forAll(EmptyBitSet, PosInt)
    .satisfy(function (b, bit) {
      return b.nextClearBit(bit) === bit;
    })
    .asTest());

  it('next clear of one set', forAll(EmptyBitSet, PosInt)
    .satisfy(function (b, bit) {
      b.set(bit);
      return b.nextClearBit(bit) === bit + 1;
    }).asTest());

});