public void GetAllMutations()
{
var dictionary = new List<string> { "AA", "BA", "BB" };
var wordChains = new WordChains(dictionary);
var allMutations = wordChains.FindAllMutations("BA");
Assert.AreEqual(2, allMutations.Count);
Assert.AreEqual(allMutations[0], "AA");
Assert.AreEqual(allMutations[1], "BB");
}
public void GetWordMutations_DictionaryWithNoPath_ReturnsEmptyList()
{
var startWord = "AA";
var endWord = "BB";
var dictionary = new List<string> { "AA", "BB" };
var wordChains = new WordChains(dictionary);
List<string> mutation = wordChains.GetWordMutationPath(startWord, endWord);
Assert.AreEqual(0, mutation.Count);
}
public void GetWordMutations_DictionaryWithOnePossibleMutation_ReturnsMutation()
{
var startWord = "A";
var endWord = "B";
var dictionary = new List<string> { "A", "B" };
var wordChains = new WordChains(dictionary);
List<string> mutation = wordChains.GetWordMutationPath(startWord, endWord);
Assert.AreEqual( "A", mutation[0]);
Assert.AreEqual( "B", mutation[1]);
}
public void GetWordMutations_DictionaryWithEndWordAndImpossibleMutation_ReturnsCorrectMutation()
{
var startWord = "AA";
var endWord = "AB";
var dictionary = new List<string> { "AA","AB", "BB" };
var wordChains = new WordChains(dictionary);
List<string> mutation = wordChains.GetWordMutationPath(startWord, endWord);
Assert.AreEqual(2, mutation.Count);
Assert.AreEqual("AA", mutation[0]);
Assert.AreEqual("AB", mutation[1]);
}
public void GetWordMutations_DictionaryWithTwoMutationCaseBA_ReturnsMutation()
{
var startWord = "AA";
var endWord = "BB";
var dictionary = new List<string> { "AA", "BA", "BB" };
var wordChains = new WordChains(dictionary);
List<string> mutation = wordChains.GetWordMutationPath(startWord, endWord);
Assert.AreEqual(3, mutation.Count);
Assert.AreEqual("AA", mutation[0]);
Assert.AreEqual("BA", mutation[1]);
Assert.AreEqual("BB", mutation[2]);
}
public void IsValidMutation_ComparesTwoWordsOfDifferentLength_ReturnsFalse()
{
var word1 = "A";
var word2 = "BB";
var wordChains = new WordChains(null);
bool isValidMutation = wordChains.IsValidMutation(word1, word2);
Assert.IsFalse(isValidMutation);
}
public void IsValidMutation_ComparesTwoMutableWordOfSameLength_ReturnsTrue()
{
var word1 = "AA";
var word2 = "AB";
var wordChains = new WordChains(null);
bool isValidMutation = wordChains.IsValidMutation(word1, word2);
Assert.IsTrue(isValidMutation);
}