public void StringProblems_RotateMatrix_RotatesMatrixCorrectly()
{
// Arrange
bool areEqual;
char[] matrixOneRowOne = new char[4];
char[] matrixOneRowTwo = new char[4];
char[] matrixOneRowThree = new char[4];
char[] matrixOneRowFour = new char[4];
char[] matrixTwoRowOne = { 'm', 'i', 'e', 'a' };
char[] matrixTwoRowTwo = { 'n', 'j', 'f', 'b' };
char[] matrixTwoRowThree = { 'o', 'k', 'g', 'c' };
char[] matrixTwoRowFour = { 'p', 'l', 'h', 'd' };
char[,] preRotation =
{
{ 'a', 'b', 'c', 'd' }, { 'e', 'f', 'g', 'h' },
{ 'i', 'j', 'k', 'l' }, { 'm', 'n', 'o', 'p' }
};
// Act
text.RotateMatrix(ref preRotation, 4);
for (int i = 0; i < 4; i++)
{
matrixOneRowOne[i] = preRotation[0, i];
matrixOneRowTwo[i] = preRotation[1, i];
matrixOneRowThree[i] = preRotation[2, i];
matrixOneRowFour[i] = preRotation[3, i];
}
// Assert
areEqual = matrixOneRowOne.SequenceEqual(matrixTwoRowOne);
areEqual.Should().BeTrue();
areEqual = matrixOneRowTwo.SequenceEqual(matrixTwoRowTwo);
areEqual.Should().BeTrue();
areEqual = matrixOneRowThree.SequenceEqual(matrixTwoRowThree);
areEqual.Should().BeTrue();
areEqual = matrixOneRowFour.SequenceEqual(matrixTwoRowFour);
areEqual.Should().BeTrue();
}
