public void Matrix2D_Clear()
{
var m = new Matrix2D <string>();
Assert.AreEqual(0, m.RowCount);
Assert.AreEqual(0, m.ColumnCount);
m.Clear();
Assert.AreEqual(0, m.RowCount);
Assert.AreEqual(0, m.ColumnCount);
m[0, 0] = "Hello World!";
Assert.AreEqual(1, m.RowCount);
Assert.AreEqual(1, m.ColumnCount);
m.Clear();
Assert.AreEqual(0, m.RowCount);
Assert.AreEqual(0, m.ColumnCount);
Assert.IsNull(m[0, 0]);
m[100, 100] = "100,100";
m.Clear();
Assert.AreEqual(0, m.RowCount);
Assert.AreEqual(0, m.ColumnCount);
}