public void Remove_FirstTimeReturnsTrueNextTimeReturnsFalse()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("z"));
Assert.True(trie.Remove(new Word("z")));
Assert.False(trie.Remove(new Word("z")));
Assert.False(trie.Remove(new Word("z")));
trie.Add(new Word("zz"));
Assert.True(trie.Remove(new Word("zz")));
Assert.False(trie.Remove(new Word("zz")));
Assert.False(trie.Remove(new Word("zz")));
trie.Add(new Word("zzx"));
Assert.True(trie.Remove(new Word("zzx")));
Assert.False(trie.Remove(new Word("zzx")));
Assert.False(trie.Remove(new Word("zzx")));
trie.Add(new Word("zwxy"));
Assert.True(trie.Remove(new Word("zwxy")));
Assert.False(trie.Remove(new Word("zwxy")));
Assert.False(trie.Remove(new Word("zwxy")));
trie.Add(new Word("vwxy"));
Assert.True(trie.Remove(new Word("vwxy")));
Assert.False(trie.Remove(new Word("vwxy")));
Assert.False(trie.Remove(new Word("vwxy")));
}
public void MatchAnagram_Length6ThreeWild_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("abc"));
trie.Add(new Word("bcd"));
trie.Add(new Word("east"));
trie.Add(new Word("easter"));
trie.Add(new Word("eaters"));
trie.Add(new Word("era"));
trie.Add(new Word("erase"));
trie.Add(new Word("eraser"));
trie.Add(new Word("extra"));
trie.Add(new Word("seat"));
trie.Add(new Word("seater"));
trie.Add(new Word("tease"));
trie.Add(new Word("teaser"));
List <string> words = new List <string>();
trie.MatchAnagram(new Word("ee???a"), w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "EASTER", "EATERS", "ERASER", "SEATER", "TEASER" }, words.ToArray());
}
public void Add_FirstTimeReturnsTrueNextTimeReturnsFalse()
{
WordTrie trie = new WordTrie();
Assert.True(trie.Add(new Word("z")));
Assert.False(trie.Add(new Word("z")));
Assert.False(trie.Add(new Word("z")));
Assert.True(trie.Add(new Word("zz")));
Assert.False(trie.Add(new Word("zz")));
Assert.False(trie.Add(new Word("zz")));
Assert.True(trie.Add(new Word("zzx")));
Assert.False(trie.Add(new Word("zzx")));
Assert.False(trie.Add(new Word("zzx")));
Assert.True(trie.Add(new Word("azxy")));
Assert.False(trie.Add(new Word("azxy")));
Assert.False(trie.Add(new Word("azxy")));
Assert.True(trie.Add(new Word("azx")));
Assert.False(trie.Add(new Word("azx")));
Assert.False(trie.Add(new Word("azx")));
Assert.True(trie.Add(new Word("zxzxzxzxzxzxzxz")));
Assert.False(trie.Add(new Word("zxzxzxzxzxzxzxz")));
Assert.False(trie.Add(new Word("zxzxzxzxzxzxzxz")));
}
public List <string> FindWords(char[][] board, string[] words)
{
//构建字典树
WordTrie myTrie = new WordTrie();
TrieNode root = myTrie.root;
foreach (string word in words)
{
myTrie.Insert(word);
}
//使用set防止重复
HashSet <string> result = new HashSet <string>();
int m = board.Length;
int n = board[0].Length;
bool[,] visited = new bool[m, n];
//遍历整个二维数组
for (int i = 0; i < board.Length; i++)
{
for (int j = 0; j < board[0].Length; j++)
{
Find(board, visited, i, j, m, n, result, root);
}
}
return(new List <String>(result));
}
public void TrieLowerTest()
{
var trie = new WordTrie();
trie.Insert("Ab");
Assert.True(trie.Search("ab"));
}
public void Match_EmptyTrie_DoesNothing()
{
WordTrie trie = new WordTrie();
int count = 0;
trie.Match(new Word("aaaa"), w => ++ count);
Assert.Equal(0, count);
}
public void Remove_TrieEmpty_AlwaysReturnsFalse()
{
WordTrie trie = new WordTrie();
Assert.False(trie.Remove(new Word("z")));
Assert.False(trie.Remove(new Word("zy")));
Assert.False(trie.Remove(new Word("zyx")));
Assert.False(trie.Remove(new Word("zyxw")));
Assert.False(trie.Remove(new Word("abcdefghijklmno")));
}
public void Construct_WordSequence_AddsToTrie()
{
Word w1 = new Word("aaaa");
Word w2 = new Word("zzzz");
WordTrie trie = new WordTrie(new Word[] { w1, w2 });
Assert.True(trie.Contains(w1));
Assert.True(trie.Contains(w2));
}
public void Match_FirstCharNoMatch_DoesNothing()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("baaa"));
int count = 0;
trie.Match(new Word("aaaa"), w => ++ count);
Assert.Equal(0, count);
}
public void Match_FirstLevelOneMatch_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("ab"));
List <string> words = new List <string>();
trie.Match(new Word("a"), w => words.Add(w.ToString()));
Assert.Equal(new string[] { "AB" }, words.ToArray());
}
public void ThrowsWhenUsingReservedCharacters()
{
Assert.Throws <System.Exception>(() => {
var trie = new WordTrie();
trie.Insert(trie.StartChar.ToString());
});
Assert.Throws <System.Exception>(() => {
var trie = new WordTrie();
trie.Insert(trie.EndChar.ToString());
});
}
public void Match_FirstCharMatchButNoOtherMatch_DoesNothing()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("abbb"));
int count = 0;
trie.Match(new Word("ac"), w => ++ count);
Assert.Equal(0, count);
}
public void Match_FirstAndSecondLevelTwoMatches_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("abc"));
trie.Add(new Word("abd"));
List <string> words = new List <string>();
trie.Match(new Word("ab"), w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "ABC", "ABD" }, words.ToArray());
}
public void Match_OneCharFirstLevelWild_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("abc"));
trie.Add(new Word("xbc"));
trie.Add(new Word("zbc"));
List <string> words = new List <string>();
trie.Match(new Word("?"), w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "ABC", "XBC", "ZBC" }, words.ToArray());
}
public void Match_FirstLevelThreeDeepMatches_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("adefghijkl"));
trie.Add(new Word("acdefghi"));
trie.Add(new Word("abcdefg"));
List <string> words = new List <string>();
trie.Match(new Word("a"), w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "ABCDEFG", "ACDEFGHI", "ADEFGHIJKL" }, words.ToArray());
}
public void Match_TwoCharsFirstLevelWild_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("abc"));
trie.Add(new Word("bbb"));
trie.Add(new Word("bbxx"));
trie.Add(new Word("ccccc"));
List <string> words = new List <string>();
trie.Match(new Word("?b"), w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "ABC", "BBB", "BBXX" }, words.ToArray());
}
public void MatchAnagram_Length3OneWild_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("dfg"));
trie.Add(new Word("f"));
trie.Add(new Word("fed"));
trie.Add(new Word("feds"));
List <string> words = new List <string>();
trie.MatchAnagram(new Word("d?f"), w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "DFG", "FED" }, words.ToArray());
}
public void Match_ThreeCharsSecondLevelWild_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("abc"));
trie.Add(new Word("acc"));
trie.Add(new Word("axa"));
trie.Add(new Word("axc"));
List <string> words = new List <string>();
trie.Match(new Word("a?c"), w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "ABC", "ACC", "AXC" }, words.ToArray());
}
public void MatchAnagram_Length2_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("aa"));
trie.Add(new Word("aab"));
trie.Add(new Word("bbb"));
trie.Add(new Word("bc"));
List <string> words = new List <string>();
trie.MatchAnagram(new Word("aa"), w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "AA" }, words.ToArray());
}
public void MatchMaxLength_ThreeCharsAllWildMaxLength4_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("a"));
trie.Add(new Word("bb"));
trie.Add(new Word("ccc"));
trie.Add(new Word("dddd"));
trie.Add(new Word("eeeee"));
List <string> words = new List <string>();
trie.Match(new Word("???"), 4, w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "CCC", "DDDD" }, words.ToArray());
}
public void MatchAnagram_MinLength1OneWild_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("a"));
trie.Add(new Word("ab"));
trie.Add(new Word("b"));
trie.Add(new Word("bc"));
trie.Add(new Word("bcd"));
trie.Add(new Word("c"));
trie.Add(new Word("cab"));
trie.Add(new Word("d"));
List <string> words = new List <string>();
trie.MatchAnagram(new Word("ab?"), 1, w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "A", "A", "AB", "AB", "AB", "B", "B", "BC", "C", "CAB", "D" }, words.ToArray());
}
public void MatchMaxLength_TwoCharsMaxLength3_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("a"));
trie.Add(new Word("bb"));
trie.Add(new Word("cc"));
trie.Add(new Word("ccc"));
trie.Add(new Word("ccd"));
trie.Add(new Word("cccc"));
trie.Add(new Word("dddd"));
trie.Add(new Word("eeeee"));
List <string> words = new List <string>();
trie.Match(new Word("cc"), 3, w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "CC", "CCC", "CCD", }, words.ToArray());
}
public void SearchTest()
{
var trie = new WordTrie();
trie.Insert("ab");
trie.Insert("abc");
trie.Insert("abd");
trie.Insert("abcd");
Assert.True(trie.Search("ab"));
Assert.True(trie.Search("abc"));
Assert.True(trie.Search("abd"));
Assert.True(trie.Search("abcd"));
Assert.False(trie.Search("z"));
Assert.False(trie.Search("zb"));
Assert.False(trie.Search("bc"));
Assert.False(trie.Search("acb"));
Assert.False(trie.Search("?"));
}
public void TrieInsertTest()
{
var trie = new WordTrie();
trie.Insert("ab");
Assert.Equal(trie.StartChar, trie.Root.Character);
var aNode = new Node('a', trie.EndChar);
var bNode = new Node('b', trie.EndChar);
var lastNode = new Node(trie.EndChar, trie.EndChar);
Assert.True(trie.Root.Childs.TryGetValue(aNode, out var a));
Assert.Equal('a', a.Character);
Assert.True(a.Childs.TryGetValue(bNode, out var b));
Assert.Equal('b', b.Character);
Assert.True(b.Childs.TryGetValue(lastNode, out var last));
Assert.Equal('=', last.Character);
}
public void Contains_ReturnsTrueIfFoundFalseOtherwise()
{
WordTrie trie = new WordTrie();
Assert.False(trie.Contains(new Word("a")));
trie.Add(new Word("a"));
Assert.True(trie.Contains(new Word("a")));
Assert.False(trie.Contains(new Word("ab")));
trie.Add(new Word("abc"));
Assert.False(trie.Contains(new Word("ab")));
Assert.True(trie.Contains(new Word("abc")));
trie.Remove(new Word("abc"));
Assert.False(trie.Contains(new Word("ab")));
Assert.False(trie.Contains(new Word("abc")));
trie.Add(new Word("abcdefghijklmno"));
Assert.False(trie.Contains(new Word("ab")));
Assert.False(trie.Contains(new Word("abc")));
Assert.False(trie.Contains(new Word("abcd")));
Assert.False(trie.Contains(new Word("abcde")));
Assert.False(trie.Contains(new Word("abcdef")));
Assert.False(trie.Contains(new Word("abcdefg")));
Assert.False(trie.Contains(new Word("abcdefgh")));
Assert.False(trie.Contains(new Word("abcdefghi")));
Assert.False(trie.Contains(new Word("abcdefghij")));
Assert.False(trie.Contains(new Word("abcdefghijk")));
Assert.False(trie.Contains(new Word("abcdefghijkl")));
Assert.False(trie.Contains(new Word("abcdefghijklm")));
Assert.False(trie.Contains(new Word("abcdefghijklmn")));
Assert.True(trie.Contains(new Word("abcdefghijklmno")));
}
public void TrieDeleteTest()
{
var trie = new WordTrie();
trie.Insert("ab");
trie.Insert("abc");
trie.Insert("abd");
trie.Delete("ab");
Assert.False(trie.Search("ab"));
Assert.True(trie.Search("abc"));
Assert.True(trie.Search("abd"));
trie.Delete("abc");
Assert.False(trie.Search("ab"));
Assert.False(trie.Search("abc"));
Assert.True(trie.Search("abd"));
trie.Delete("abd");
Assert.False(trie.Search("ab"));
Assert.False(trie.Search("abc"));
Assert.False(trie.Search("abd"));
}
public void MatchAnagram_MinLength3ThreeWild_InvokesOnAllMatches()
{
WordTrie trie = new WordTrie();
trie.Add(new Word("area"));
trie.Add(new Word("best"));
trie.Add(new Word("ear"));
trie.Add(new Word("ears"));
trie.Add(new Word("east"));
trie.Add(new Word("eat"));
trie.Add(new Word("raster"));
trie.Add(new Word("rates"));
trie.Add(new Word("steer"));
trie.Add(new Word("tear"));
trie.Add(new Word("treat"));
List <string> words = new List <string>();
trie.MatchAnagram(new Word("??ae?s"), 3, w => words.Add(w.ToString()));
words.Sort();
Assert.Equal(new string[] { "AREA", "AREA", "AREA", "AREA", "AREA", "BEST", "BEST", "BEST", "EAR", "EAR", "EAR", "EAR", "EARS", "EARS", "EARS", "EARS", "EARS", "EARS", "EARS", "EAST", "EAST", "EAST", "EAST", "EAST", "EAST", "EAST", "EAT", "EAT", "EAT", "EAT", "RASTER", "RATES", "RATES", "RATES", "RATES", "STEER", "STEER", "TEAR", "TEAR", "TEAR", "TREAT" }, words.ToArray());
}
