public void CanGetAll()
        {
            // ACT
            var results = _source.Get(new BoundingBox(new GeoCoordinate(52.0, 13.0), new GeoCoordinate(52.2, 13.2)),
                                      MapConsts.MaxZoomLevel).ToArray().Wait(TimeSpan.FromSeconds(10)).ToList();

            // ASSERT
            Assert.IsNotNull(results);
            Assert.AreEqual(2, results.Count);
            Assert.IsNotNull(results[0]);
            Assert.IsNotNull(results[1]);
            Assert.AreNotSame(results[0], results[1]);
            Assert.Contains(1, results.Select(e => e.Id).ToArray());
            Assert.Contains(2, results.Select(e => e.Id).ToArray());
        }