cbuffer/test/mutator/shift-test.js

Circular Buffer JavaScript implementation

var vows = require('vows');
var assert = require('assert');
var suite = vows.describe('shift');

require('../env');

suite.addBatch({
  'shift' : {
    'topic' : function () {
      return CBuffer;
    },
    'shift items' : function (CBuffer) {
      var tmp;

      tmp = CBuffer(1, 2, 3);
      assert.equal(tmp.shift(), 1);
      assert.deepEqual(tmp.toArray(), [2, 3]);

      tmp = CBuffer(1, 2, 3);
      tmp.push(4);
      assert.equal(tmp.shift(), 2);
      assert.deepEqual(tmp.toArray(), [3, 4]);
    },
    'shift properties' : function (CBuffer) {
      var tmp;

      tmp = CBuffer(1, 2, 3);
      tmp.shift();
      assert.equal(tmp.length, 2);
      assert.equal(tmp.start, 1);
      assert.equal(tmp.end, 2);

      tmp = CBuffer(1, 2, 3);
      tmp.push(4);
      tmp.shift();
      assert.equal(tmp.length, 2);
      assert.equal(tmp.start, 2);
      assert.equal(tmp.end, 0);
    }
  }
});

suite.export(module);