public void FindWordsStartsWith_ReturnSubsetOfDictionaryWordsArgumentOfConstructor()
{
// arrange
var dictionaryWords = new List<DictionaryWord>()
{
new DictionaryWord("aabbbccc", 1),
new DictionaryWord("bbbaaaddd", 10),
new DictionaryWord("aaaabbbccc", 100)
};
var value = "aa";
var fastAutocompleteSearcher = new FastAutocompleteSearcher(dictionaryWords);
// act
IEnumerable<DictionaryWord> result =
fastAutocompleteSearcher.FindWordsStartsWith(value);
// assert
foreach (var item in result)
{
Assert.IsTrue(
dictionaryWords.Contains(item),
string.Format("Элемент {0} не входит в словарь", item));
}
}
public void Constructor_WhenDictionaryWordsIsNull_ShouldThrowArgumentNullException()
{
// arrange
IEnumerable<DictionaryWord> dictionaryWords = null;
// act
try
{
var fastAutocompleteSearcher =
new FastAutocompleteSearcher(dictionaryWords);
}
catch (ArgumentNullException e)
{
//assert
Assert.AreEqual("dictionaryWords", e.ParamName, false);
return;
}
Assert.Fail("Ожидаемое исключение не было выброшено.");
}
public void FindWordsStartsWith_ReturnWordsCountLimitedByMaxCountArgument()
{
// arrange
var dictionaryWords = new List<DictionaryWord>()
{
new DictionaryWord("aabbbccc", 1),
new DictionaryWord("aaaabbbccc", 10),
new DictionaryWord("aaabbbccc", 100),
new DictionaryWord("aaaabbbccc", 1000)
};
var value = "aa";
var wordsMaxCount = 2;
var fastAutocompleteSearcher = new FastAutocompleteSearcher(dictionaryWords);
// act
IEnumerable<DictionaryWord> result =
fastAutocompleteSearcher.FindWordsStartsWith(value, wordsMaxCount);
// assert
Assert.IsTrue(
result.Count() <= wordsMaxCount,
"Результат содержит слишком много элементов");
}
public void FindWordsStartsWith_WhenValueIsNull_ShouldThrowArgumentNullException()
{
// arrange
var dictionaryWords = new List<DictionaryWord>();
var fastAutocompleteSearcher =
new FastAutocompleteSearcher(dictionaryWords);
// act
try
{
fastAutocompleteSearcher.FindWordsStartsWith(null);
}
catch (ArgumentNullException e)
{
//assert
Assert.AreEqual("value", e.ParamName, false);
return;
}
Assert.Fail("Ожидаемое исключение не было выброшено.");
}
public void FindWordsStartsWith_WhenMaxCountLess1_ShouldThrowArgumentOutOfRangeException()
{
// arrange
var dictionaryWords = new List<DictionaryWord>();
var value = "aa";
var fastAutocompleteSearcher = new FastAutocompleteSearcher(dictionaryWords);
// act
try
{
fastAutocompleteSearcher.FindWordsStartsWith(value, 0);
}
catch (ArgumentOutOfRangeException e)
{
// assert
Assert.AreEqual("maxCount", e.ParamName, false);
return;
}
Assert.Fail("Ожидаемое исключение не было выброшено.");
}
public void FindWordsStartsWith_ReturnWordsWithSameBeginning()
{
// arrange
var dictionaryWords = new List<DictionaryWord>()
{
new DictionaryWord("aabbbccc", 1),
new DictionaryWord("bbbaaaddd", 10),
new DictionaryWord("aaaabbbccc", 100),
new DictionaryWord("caabbbccc", 1000)
};
var value = "aa";
var fastAutocompleteSearcher = new FastAutocompleteSearcher(dictionaryWords);
// act
IEnumerable<DictionaryWord> result =
fastAutocompleteSearcher.FindWordsStartsWith(value);
// assert
foreach (var item in result)
{
Assert.IsTrue(
item.Text.StartsWith(
value,
StringComparison.Ordinal),
"Результат содержит слово '{0}', его начало не совпадает с '{1}'",
item.Text,
value);
}
}
public void FindWordsStartsWith_ReturnWordsOrderedByFrequencyDescendingAndTextAscending()
{
// arrange
var dictionaryWords = new List<DictionaryWord>()
{
new DictionaryWord("aabbbccc", 10),
new DictionaryWord("aaaabbbccc", 1),
new DictionaryWord("aaabbbccc", 1000),
new DictionaryWord("aaaabbbccc", 1000)
};
var value = "aa";
var fastAutocompleteSearcher = new FastAutocompleteSearcher(dictionaryWords);
// act
IEnumerable<DictionaryWord> result =
fastAutocompleteSearcher.FindWordsStartsWith(value);
// assert
DictionaryWord prevItem = null;
foreach (var item in result)
{
if (prevItem != null)
{
Assert.IsTrue(
item.Frequency <= prevItem.Frequency,
"Нет сортировки по убыванию частоты слова");
if (prevItem.Frequency == item.Frequency)
{
Assert.IsTrue(
string.CompareOrdinal(item.Text, prevItem.Text) >= 0,
"Нет сортировки по алфавиту");
}
}
prevItem = item;
}
}