public void Read_ReturnCollectionOfDictionaryWordObjectsWithDataFromStreamRowsSkipFirst()
{
// arrange
var stream = new MemoryStream();
var streamWriter = new StreamWriter(stream);
streamWriter.WriteLine(3);
streamWriter.WriteLine("element1 10");
streamWriter.WriteLine("element2 20");
streamWriter.WriteLine("element3 30");
streamWriter.Flush();
stream.Seek(0, SeekOrigin.Begin);
var expectedResultArray = new DictionaryWord[]
{
new DictionaryWord("element1", 10),
new DictionaryWord("element2", 20),
new DictionaryWord("element3", 30)
};
var streamReader = new StreamReader(stream);
var dictionaryWordsInputReader =
new DictionaryWordsInputReader(streamReader);
// act
var actualResultCollection = dictionaryWordsInputReader.Read();
//assert
var actualResultArray = actualResultCollection.ToArray();
CollectionAssert.AreEqual(
expectedResultArray,
actualResultArray,
new DictionaryWordComparer());
}
public void Constructor_WhenStreamReaderIsNull_ShouldThrowArgumentNullException()
{
// arrange
StreamReader streamReader = null;
// act
try
{
var dictionaryWordsInputReader =
new DictionaryWordsInputReader(streamReader);
}
catch (ArgumentNullException e)
{
//assert
Assert.AreEqual("streamReader", e.ParamName, false);
return;
}
Assert.Fail("Ожидаемое исключение не было выброшено.");
}
public void Read_ReturnCollectionWithSizeEqualNumberFromStreamFirstRowData()
{
// arrange
var stream = new MemoryStream();
var streamWriter = new StreamWriter(stream);
streamWriter.WriteLine(3);
streamWriter.WriteLine("element1 10");
streamWriter.WriteLine("element2 20");
streamWriter.WriteLine("element3 30");
streamWriter.WriteLine("element4 40");
streamWriter.Flush();
stream.Seek(0, SeekOrigin.Begin);
var expectedResultCollectionSize = 3;
var streamReader = new StreamReader(stream);
var dictionaryWordsInputReader =
new DictionaryWordsInputReader(streamReader);
// act
var actualResultCollection = dictionaryWordsInputReader.Read();
//assert
var actualResultArray = actualResultCollection.ToArray();
Assert.AreEqual(expectedResultCollectionSize, actualResultArray.Length);
}
public void Read_WhenStreamFromSecondRowDataHasInvalidFormat_ShouldThrowFormatException()
{
// arrange
var stream = new MemoryStream();
var streamWriter = new StreamWriter(stream);
streamWriter.WriteLine(2);
streamWriter.WriteLine("Element1 10"); // корректный формат
streamWriter.WriteLine("Element2"); // некорректный формат
streamWriter.Flush();
stream.Seek(0, SeekOrigin.Begin);
var streamReader = new StreamReader(stream);
var dictionaryWordsInputReader =
new DictionaryWordsInputReader(streamReader);
// act
try
{
dictionaryWordsInputReader.Read();
}
catch (FormatException)
{
//assert
return;
}
Assert.Fail("Ожидаемое исключение не было выброшено.");
}
public void Read_WhenStreamFirstRowDataIsNotNumber_ShouldThrowFormatException()
{
// arrange
var stream = new MemoryStream();
var streamWriter = new StreamWriter(stream);
streamWriter.Write("some string");
streamWriter.Flush();
stream.Seek(0, SeekOrigin.Begin);
var streamReader = new StreamReader(stream);
var dictionaryWordsInputReader =
new DictionaryWordsInputReader(streamReader);
// act
try
{
dictionaryWordsInputReader.Read();
}
catch (FormatException)
{
//assert
return;
}
Assert.Fail("Ожидаемое исключение не было выброшено.");
}
public void Read_WhenNumberInStreamFirstRowLessThan0_ShouldThrowInvalidOperationException()
{
// arrange
var stream = new MemoryStream();
var streamWriter = new StreamWriter(stream);
streamWriter.Write(-1);
streamWriter.Flush();
stream.Seek(0, SeekOrigin.Begin);
var streamReader = new StreamReader(stream);
var dictionaryWordsInputReader =
new DictionaryWordsInputReader(streamReader);
// act
try
{
dictionaryWordsInputReader.Read();
}
catch (InvalidOperationException)
{
//assert
return;
}
Assert.Fail("Ожидаемое исключение не было выброшено.");
}
