public void GetAllUnsetVariables_NoVariablesAreUnset_ReturnsEmptyCollection()
{
// Arrange
var grid = new SudokuGrid(FullGrid());
// Act
var unsetVariables = new List <Variable>(grid.GetAllUnsetVariables());
// Assert
Assert.AreEqual(0, unsetVariables.Count);
}
public void GetAllUnsetVariables_AllVariablesAreUnset_ReturnsAllVariables()
{
// Arrange
var initialValues = EmptyGrid();
var grid = new SudokuGrid(initialValues);
// Act
var unsetVariables = new List <Variable>(grid.GetAllUnsetVariables());
// Assert
Assert.AreEqual(initialValues.Cells, unsetVariables.Count);
Assert.IsTrue(unsetVariables.All(v => !v.IsSet));
}
public void GetAllUnsetVariables_SomeVariablesAreUnset_ReturnsOnlyUnsetVariables()
{
// Arrange
var initialValues = AnyInitialValues();
var grid = new SudokuGrid(initialValues);
// Act
var unsetVariables = new List <Variable>(grid.GetAllUnsetVariables());
// Assert
int unsetCount = initialValues.Count(x => x == Variable.UNSET_VALUE);
Assert.AreEqual(unsetCount, unsetVariables.Count);
Assert.IsTrue(unsetVariables.All(v => !v.IsSet));
}