public Property ShouldProduceASquareOutput() =>
Prop.ForAll(UpperCase(), c =>
{
var lines = DiamondShaped.DiamonLines(c);
var height = lines.Count();
return(lines.All(l => l.Length == height));
});
public void ExampleC()
{
Assert.That(
DiamondShaped.DiamonLines('C').ToArray(),
Is.EquivalentTo(new[] { " A ", " B B ", "C C", " B B ", " A " })
);
}
public void ExampleA()
{
Assert.That(
DiamondShaped.DiamonLines('A'),
Is.EquivalentTo(new[] { "A" })
);
}
public Property ShouldHaveVerticalSymetry() =>
Prop.ForAll(UpperCase(), c =>
{
var lines = DiamondShaped.DiamonLines(c);
return(lines.Reverse()
.Zip(lines)
.All(tuple => tuple.First == tuple.Second));
});
public Property EachLineShouldOnlyHaveOneLetter() =>
Prop.ForAll(UpperCase(), c =>
{
var lines = DiamondShaped.DiamonLines(c);
return(lines.Select(l => l.Replace(" ", ""))
.Select(l => l.Distinct())
.All(l => l.Count() == 1));
});
public Property ShouldPositionLettersCorrectly() =>
Prop.ForAll(UpperCase(), c =>
{
var lines = DiamondShaped.DiamonLines(c).ToArray();
var midPoint = lines.Length / 2 + 1;
var matrix = lines.Take(midPoint).Reverse().Select(l => l.Substring(0, midPoint).ToCharArray()).ToArray();
foreach (var i in Enumerable.Range(0, midPoint))
{
var expectedC = (char)(c - i);
if (matrix[i][i] != expectedC)
{
return(false);
}
}
return(true);
});
public Property ShouldHaveHorizontalSymetry() =>
Prop.ForAll(UpperCase(), c =>
{
DiamondShaped.DiamonLines(c)
.All(line => string.Join("", line.Reverse()) == line);
});
public Property ShouldAlwaysProduceAnOddNumberOfLines() =>
Prop.ForAll(UpperCase(), c =>
DiamondShaped.DiamonLines(c).Count() % 2 == 1
);
public Property ShouldAlwaysProduceLines() =>
Prop.ForAll(UpperCase(), c =>
DiamondShaped.DiamonLines(c).Count() != 0
);