public void ReadLastNBytes_GetMoreThanPossible()
{
var mockedFileStream = new MockedFileStream(new byte[] { 1, 2, 3, 4, 5 });
var reader = new FileReader(DummyFileName) { myFileStream = mockedFileStream, File = new MockedFile() };
var last7Bytes = reader.ReadLastNBytes(7);
Assert.AreEqual(5, last7Bytes.Count(), "Wrong number of returned bytes.");
Assert.AreEqual(1, last7Bytes[0], "Unexpected result.");
Assert.AreEqual(5, last7Bytes[4], "Unexpected result.");
}
public void GetNewLines()
{
var source = new MockedFileStream(FIRSTLINE);
var reader = new FileReader("dummyFileName") { myFileStream = source, File = new MockedFile() };
var tail = new Tail("dummyFileName", Encoding.Default, reader);
Assert.AreEqual(Encoding.ASCII, tail.myFileType, "Encoding detected wrong.");
var lines = tail.GetNewLines();
Assert.AreEqual(1, lines.Count, "Unexpected count of lines read.");
StringAssert.Matches(lines.First(), firstLineRegex, "Wrong content.");
}
public void ReadNewBytes_ContinuousReadingAfterNewItemsAdded()
{
var mockedFileStream = new MockedFileStream(new byte[] { 1, 2, 3, 4, 5 });
var reader = new FileReader(DummyFileName) { myFileStream = mockedFileStream, File = new MockedFile() };
var bytes = reader.ReadNewBytes();
Assert.AreEqual(5, bytes.Length, "Wrong number of returned bytes in the 1st round.");
Assert.AreEqual(1, bytes[0], "Unexpected result in the 1st round.");
Assert.AreEqual(5, bytes[4], "Unexpected result in the 1st round.");
mockedFileStream.AddItems(new byte[] { 7, 8, 9 });
bytes = reader.ReadNewBytes();
Assert.AreEqual(3, bytes.Length, "Wrong number of returned bytes in the 2nd round.");
Assert.AreEqual(7, bytes[0], "Unexpected result in the 2nd round.");
Assert.AreEqual(8, bytes[1], "Unexpected result in the 2nd round.");
Assert.AreEqual(9, bytes[2], "Unexpected result in the 2nd round.");
}
public void ReadNewBytes_ReadThrough5ItemsBy2()
{
var mockedFileStream = new MockedFileStream(new byte[] { 1, 2, 3, 4, 5 });
var reader = new FileReader(DummyFileName) { myFileStream = mockedFileStream, File = new MockedFile() };
var twoBytes = reader.ReadNewBytes(2);
Assert.AreEqual(2, twoBytes.Count(), "Wrong number of returned bytes.");
Assert.AreEqual(1, twoBytes[0], "Unexpected result after 1st 2 bytes read.");
Assert.AreEqual(2, twoBytes[1], "Unexpected result after 1st 2 bytes read.");
twoBytes = reader.ReadNewBytes(2);
Assert.AreEqual(2, twoBytes.Count(), "Wrong number of returned bytes.");
Assert.AreEqual(3, twoBytes[0], "Unexpected result after 2nd 2 bytes read.");
Assert.AreEqual(4, twoBytes[1], "Unexpected result after 2nd 2 bytes read.");
twoBytes = reader.ReadNewBytes(2);
Assert.AreEqual(1, twoBytes.Count(), "Wrong number of returned bytes.");
Assert.AreEqual(5, twoBytes[0], "Unexpected result after 3rd 2 bytes read.");
}
public void GetNewLines_ContinuousReading()
{
var input = new List<string>
{
"first line",
"second line",
"third line"
};
var additionalLines = new List<string>
{
"fourth line",
"fifth line",
"sixth line",
"7th line"
};
var source = new MockedFileStream(input);
var reader = new FileReader("dummyFileName") { myFileStream = source, File = new MockedFile() };
var tail = new Tail("dummyFileName", Encoding.Default, reader);
var output = tail.GetNewLines();
Assert.AreEqual(input.Count, output.Count, "Unexpected count of lines at start");
for (var i = 0; i < input.Count; i++)
{
StringAssert.Matches(output[i], new Regex(input[i]), "Unmatching line in the 1st round.");
}
source.AddNewLines(additionalLines, Encoding.Default);
output = tail.GetNewLines();
Assert.AreEqual(additionalLines.Count, output.Count, "Unexpected count of lines after new lines added.");
for (var i = 0; i < additionalLines.Count; i++)
{
StringAssert.Matches(output[i], new Regex(additionalLines[i]), "Unmatching line in the 2nd round.");
}
}
