public void StartFromTheTopLeftCorner(int matrixSize)
{
// Walk in the matrix starts from the top left corner of the matrix.
// Arrange
var reader = new Mock <IReadable>();
reader.Setup(x => x.ReadSize()).Returns(matrixSize);
var writer = new Mock <IWritable>();
// Act
var walk = new WalkInMatrix(reader.Object, writer.Object);
walk.Execute();
// Assert
Assert.AreEqual(1, walk.Matrix[0, 0]);
}
public void PrintTheMatrix_WhenNoEmptyCellIsLeft(int matrixSize)
{
// When no empty cell is left in the matrix, the walk is finished.
// Arrange
var reader = new Mock <IReadable>();
reader.Setup(x => x.ReadSize()).Returns(matrixSize);
var writer = new Mock <IWritable>();
var walk = new WalkInMatrix(reader.Object, writer.Object);
// Act
walk.Execute();
// Assert
writer.Verify(x => x.Write(It.IsAny <string>()));
}
public void GoInDownRightDirectionToTheBottomRightCorner(int matrixSize)
{
// Goes in down-right direction.
// Arrange
// matrixSize is always the value at the bottom-right corner(matrix is square)
var reader = new Mock <IReadable>();
reader.Setup(x => x.ReadSize()).Returns(matrixSize);
var writer = new Mock <IWritable>();
var walk = new WalkInMatrix(reader.Object, writer.Object);
// Act
walk.Execute();
// Assert
Assert.AreEqual(matrixSize, walk.Matrix[matrixSize - 1, matrixSize - 1]);
}
public void RestartTheWalk_WhenNoEmptyCellIsAvailableAtAllDirections_ButThereAreStillEmptyCellsInMatrix()
{
// this test requires matrixSize >= 4, since there will be no empty cells after the first walk otherwise
// When no empty cell is available at all directions, the walk is restarted from an empty cell at the
// smallest possible row and as close as possible to the start of this row.
// Arrange
int matrixSize = 6;
var reader = new Mock <IReadable>();
reader.Setup(x => x.ReadSize()).Returns(matrixSize);
var writer = new Mock <IWritable>();
var walk = new WalkInMatrix(reader.Object, writer.Object);
// Act
walk.Execute();
// Assert
Assert.AreEqual(31, walk.Matrix[2, 1]);
}
public void ChangeDirectionClockwise_WhenNoContinuationIsAvailableAtCurrentDirection(int matrixSize)
{
// When no continuation is available at the current direction (either the matrix wall or non-empty cell is
// reached), the direction is changed to the next possible clockwise.
// Arrange
// matrixSize is always the value at the bottom-right corner(matrix is square)
var reader = new Mock <IReadable>();
reader.Setup(x => x.ReadSize()).Returns(matrixSize);
var writer = new Mock <IWritable>();
var walk = new WalkInMatrix(reader.Object, writer.Object);
// Act
walk.Execute();
// Assert
// (matrixSize + 1) --> is always the value at the first possible cell clockwise
// walk.Matrix[matrixSize - 1, matrixSize - 2] --> is always the coordinates of the first possible cell clockwise
Assert.AreEqual(matrixSize + 1, walk.Matrix[matrixSize - 1, matrixSize - 2]);
}
