public void Generate_Test2()
{
CollectionAssert.AreEqual(
new[] {
1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768
},
EnumerableExtras
.Generate(1, n => n * 2)
.Take(16)
.ToArray()
);
var rules = new Regex("[AB]");
CollectionAssert.AreEqual(
new[] {
"A",
"B-A-B",
"A+B+A-B-A-B-A+B+A",
"B-A-B+A+B+A+B-A-B-A+B+A-B-A-B-A+B+A-B-A-B+A+B+A+B-A-B",
"A+B+A-B-A-B-A+B+A+B-A-B+A+B+A+B-A-B+A+B+A-B-A-B-A+B+A-B-A-B+A+B+A+B-A-B-A+" +
"B+A-B-A-B-A+B+A-B-A-B+A+B+A+B-A-B-A+B+A-B-A-B-A+B+A+B-A-B+A+B+A+B-A-B+A+B+" +
"A-B-A-B-A+B+A"
},
EnumerableExtras
.Generate(
"A",
str => rules.Replace(
str,
m => m.Value[0] switch {
'A' => "B-A-B",
'B' => "A+B+A",
_ => ""
}
public void Generate_Test1()
{
var i = 0;
CollectionAssert.AreEqual(
new[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 },
EnumerableExtras
.Generate(() => i++)
.Take(21)
.ToArray()
);
Assert.ThrowsException <ArgumentNullException>(
() => EnumerableExtras.Generate <int>(null)
.GetEnumerator()
.MoveNext()
);
}
