public void StringProblems_ReplaceWithZeros_ReplacesCorrectIndicesWithZeros()
{
// Arrange
bool areEqual;
int[] matrixOneRowOne = new int[3];
int[] matrixOneRowTwo = new int[3];
int[] matrixOneRowThree = new int[3];
int[] matrixOneRowFour = new int[3];
int[] matrixTwoRowOne = { 0, 0, 0 };
int[] matrixTwoRowTwo = { 3, 0, 0 };
int[] matrixTwoRowThree = { 0, 0, 0 };
int[] matrixTwoRowFour = { 4, 0, 0 };
int[,] preReplacement =
{
{ 4, 0, 1 }, { 3, 5, 7 },
{ 9, 18, 0 }, { 4, 12, 14 }
};
// Act
text.ReplaceWithZeros(ref preReplacement, 4, 3);
for (int i = 0; i < 3; i++)
{
matrixOneRowOne[i] = preReplacement[0, i];
matrixOneRowTwo[i] = preReplacement[1, i];
matrixOneRowThree[i] = preReplacement[2, i];
matrixOneRowFour[i] = preReplacement[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();
}