public void WhenNullShouldBeEmptyArray()
{
var sut = new Anagram();
var expected = new string[]{};
var actual = sut.Generate(null);
Assert.AreEqual(expected, actual);
}
public void WhenTwoLettersShouldBeTwoLetterArray()
{
var sut = new Anagram();
var anonymous = "ab";
var expected = new string[]{"ab","ba"};
var actual = sut.Generate(anonymous);
Assert.AreEqual(expected, actual);
}
public void WhenSingleLetterShouldBeOneMemberArray()
{
var sut = new Anagram();
var anonymous = "a";
var expected = new string[]{anonymous};
var actual = sut.Generate(anonymous);
Assert.AreEqual(expected, actual);
}
public void WhenManyLettersShouldGenerateAnagrams()
{
var sut = new Anagram();
var anonymous = "biro";
var expected = new string[]{"biro","bior","brio","broi","boir","bori",
"ibro","ibor","irbo","irob","iobr","iorb",
"rbio","rboi","ribo","riob","robi","roib",
"obir","obri","oibr","oirb","orbi","orib"};
var actual = sut.Generate(anonymous);
Assert.AreEqual(expected, actual);
}