public void IsEdgeThrowsExceptionIfIndexIsOutOfRange()
{
Int32[,] dblArray = new Int32[,] {
{1, 2, 3},
{2, 1, 2},
{3, 2, 1}
};
var symmMatrix = new SymmetricMatrix<Int32>(Guid.NewGuid(), dblArray);
Assert.Throws<IndexOutOfRangeException>(()
=> symmMatrix.IsEdge(4, 0));
Assert.Throws<IndexOutOfRangeException>(()
=> symmMatrix.IsEdge(1, -1));
}