public void GetMapPartTest(int size)
{
// Arrange
var mapCellsFactory = new Func <IAreaMapCellInternal>(() => new Mock <IAreaMapCellInternal>().Object);
var map = new AreaMap(1, mapCellsFactory, 30, 30);
// Act
var area = map.GetMapPart(new Point(1, 1), size);
// Assert
var expectedAreaDiameter = size * 2 + 1;
Assert.AreEqual(expectedAreaDiameter, area.Length);
Assert.IsTrue(area.All(row => row.Length == expectedAreaDiameter));
}