public void Multiply_FourByFour_ReturnsExpectedValue()
{
// arrange
SquareEvenMatrix a = new SquareEvenMatrix(new int[,]
{
{2, 3, 4, 5, },
{6, 7, 8 ,9, },
{10, 11, 12, 13,},
{14, 15, 16 ,17,},
});
SquareEvenMatrix b = new SquareEvenMatrix(new int[,]
{
{5, 4, 3, 2, },
{6, 7, 8 ,9, },
{10, 11, 12, 13,},
{14, 15, 16 ,17,},
});
SquareEvenMatrix expected = new SquareEvenMatrix(new int[,]
{
{
2 * 5 + 3 * 6 + 4 * 10 + 5 * 14,
2 * 4 + 3 * 7 + 4 * 11 + 5 * 15,
2 * 3 + 3 * 8 + 4 * 12 + 5 * 16,
2 * 2 + 3 * 9 + 4 * 13 + 5 * 17,
},
{
6 * 5 + 7 * 6 + 8 * 10 + 9 * 14,
6 * 4 + 7 * 7 + 8 * 11 + 9 * 15,
6 * 3 + 7 * 8 + 8 * 12 + 9 * 16,
6 * 2 + 7 * 9 + 8 * 13 + 9 * 17,
},
{
10 * 5 + 11 * 6 + 12 * 10 + 13 * 14,
10 * 4 + 11 * 7 + 12 * 11 + 13 * 15,
10 * 3 + 11 * 8 + 12 * 12 + 13 * 16,
10 * 2 + 11 * 9 + 12 * 13 + 13 * 17,
},
{
14 * 5 + 15 * 6 + 16 * 10 + 17 * 14,
14 * 4 + 15 * 7 + 16 * 11 + 17 * 15,
14 * 3 + 15 * 8 + 16 * 12 + 17 * 16,
14 * 2 + 15 * 9 + 16 * 13 + 17 * 17,
},
});
// act
SquareEvenMatrix actual = SquareEvenMatrix.StrassenMatrixMultiplication(a, b);
// assert
Assert.AreEqual(expected, actual);
}
public void Constructor_TwoByTwo_IndicesReturnExpectedValues()
{
// arrange
int[,] value = new int[,]
{
{2, 3},
{4, 5},
};
// act
SquareEvenMatrix a = new SquareEvenMatrix(value);
// assert
Assert.AreEqual(2, a[0, 0]);
Assert.AreEqual(2, a.TopLeft[0, 0]);
Assert.AreEqual(3, a[0, 1]);
Assert.AreEqual(3, a.TopRight[0, 0]);
Assert.AreEqual(4, a[1, 0]);
Assert.AreEqual(4, a.BottomLeft[0, 0]);
Assert.AreEqual(5, a[1, 1]);
Assert.AreEqual(5, a.BottomRight[0, 0]);
}
public void Multiply_TwoByTwo_ReturnsExpectedResult()
{
// arrange
SquareEvenMatrix a = new SquareEvenMatrix(new int[,]
{
{2, 3},
{4, 5},
});
SquareEvenMatrix b = new SquareEvenMatrix(new int[,]
{
{3, 4},
{5, 6},
});
// act
SquareEvenMatrix actual = SquareEvenMatrix.StrassenMatrixMultiplication(a, b);
// assert
Assert.AreEqual(2 * 3 + 3 * 5, actual[0, 0], "Multiplication should produce expected result.");
Assert.AreEqual(2 * 4 + 3 * 6, actual[0, 1], "Multiplication should produce expected result.");
Assert.AreEqual(4 * 3 + 5 * 5, actual[1, 0], "Multiplication should produce expected result.");
Assert.AreEqual(4 * 4 + 5 * 6, actual[1, 1], "Multiplication should produce expected result.");
}
public void Multiply_UnitMatrices_ReturnsUnitMatrix()
{
// arrange
SquareEvenMatrix a = new SquareEvenMatrix(new int[,] { { 2 } });
SquareEvenMatrix b = new SquareEvenMatrix(new int[,] { { 3 } });
// act
SquareEvenMatrix c = SquareEvenMatrix.StrassenMatrixMultiplication(a, b);
// assert
Assert.AreEqual(6, c[0, 0], "Multiplication should produce expected result.");
}
