public void Read_ReturnCollectionOfStringsWithDataFromStreamRowsSkipFirst()
{
// arrange
var stream = new MemoryStream();
var streamWriter = new StreamWriter(stream);
streamWriter.WriteLine(3);
streamWriter.WriteLine("element1");
streamWriter.WriteLine("element2");
streamWriter.WriteLine("element3");
streamWriter.Flush();
stream.Seek(0, SeekOrigin.Begin);
var expectedResultArray = new string[]
{
"element1", "element2", "element3"
};
var streamReader = new StreamReader(stream);
var beginningsOfWordsInputReader =
new BeginningsOfWordsInputReader(streamReader);
// act
var actualResultCollection = beginningsOfWordsInputReader.Read();
//assert
var actualResultArray = actualResultCollection.ToArray();
CollectionAssert.AreEqual(expectedResultArray, actualResultArray);
}
public void Constructor_WhenStreamReaderIsNull_ShouldThrowArgumentNullException()
{
// arrange
StreamReader streamReader = null;
// act
try
{
var beginningsOfWordsInputReader =
new BeginningsOfWordsInputReader(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");
streamWriter.WriteLine("element2");
streamWriter.WriteLine("element3");
streamWriter.WriteLine("element4");
streamWriter.Flush();
stream.Seek(0, SeekOrigin.Begin);
var expectedResultCollectionSize = 3;
var streamReader = new StreamReader(stream);
var beginningsOfWordsInputReader =
new BeginningsOfWordsInputReader(streamReader);
// act
var actualResultCollection = beginningsOfWordsInputReader.Read();
//assert
var actualResultArray = actualResultCollection.ToArray();
Assert.AreEqual(expectedResultCollectionSize, actualResultArray.Length);
}
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 beginningsOfWordsInputReader =
new BeginningsOfWordsInputReader(streamReader);
// act
try
{
beginningsOfWordsInputReader.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 beginningsOfWordsInputReader =
new BeginningsOfWordsInputReader(streamReader);
// act
try
{
beginningsOfWordsInputReader.Read();
}
catch (InvalidOperationException)
{
//assert
return;
}
Assert.Fail("Ожидаемое исключение не было выброшено.");
}