public void GetKeysWithPrefixTest() { var dictionary = new Dictionary <string, int> { { "she", 0 }, { "sells", 0 }, { "shells", 0 }, { "sea", 0 }, { "shore", 0 } }; var prefix = "s"; var allKeys = _symbolTable.GetKeysWithPrefix(prefix); var expected = 5; var actual = CheckKeys(allKeys, dictionary); Assert.AreEqual(expected, actual); dictionary.Clear(); dictionary.Add("she", 0); dictionary.Add("shells", 0); dictionary.Add("shore", 0); prefix = "sh"; allKeys = _symbolTable.GetKeysWithPrefix(prefix); expected = 3; actual = CheckKeys(allKeys, dictionary); Assert.AreEqual(expected, actual); prefix = "Invalid"; expected = 0; allKeys = _symbolTable.GetKeysWithPrefix(prefix); actual = allKeys.Count(); Assert.AreEqual(expected, actual); }