public void GetSetNeighbors_WithAnyVariable_ReturnsSetVariablesInRowColumnAndSquare()
{
// Arrange
var grid = new SudokuGrid(EmptyGrid());
var variable = grid[8, 8];
var expectedVariables = new Variable[]
{
grid[8, 3], // same row
grid[1, 8], // same column
grid[7, 7], // same square
grid[8, 6] // same row and square
};
foreach (var neighbor in expectedVariables)
{
neighbor.Value = 2;
}
// Act
var setNeighbors = new List <Variable>(grid.GetSetNeighbors(variable));
// Assert
CollectionAssert.AreEquivalent(expectedVariables, setNeighbors);
}
public void GetSetNeighbors_VariableIsSet_ReturnsVariableWithNeighbors()
{
// Arrange
var grid = new SudokuGrid(EmptyGrid());
var variable = grid[6, 1];
variable.Value = 4;
var neighbors = new Variable[]
{
grid[6, 6], // same row
grid[2, 1], // same column
grid[7, 0], // same square
grid[6, 0] // same row and square
};
foreach (var neighbor in neighbors)
{
neighbor.Value = 7;
}
// Act
var setNeighbors = new List <Variable>(grid.GetSetNeighbors(variable));
// Assert
CollectionAssert.DoesNotContain(setNeighbors, variable);
}
public void GetSetNeighbors_WithNullVariable_ThrowsArgumentNullException()
{
// Arrange
var grid = new SudokuGrid(AnyInitialValues());
// Act
Action action = () =>
{
grid.GetSetNeighbors(null);
};
// Assert
Assert.ThrowsException <ArgumentNullException>(action);
}