public void NullStream()
{
// Arrange
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var seekableStream = new SearchableStream(null)) { }
}
public void NullNeedle()
{
var haystackByteArray = Encoding.ASCII.GetBytes("This haystack does not contain a n-e-e-d-l-e");
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
// Act
var foundPosition = seekableStream.IndexOfAllBackwards(null);
}
}
public void EmptyNeedle()
{
// Arrange
var haystackByteArray = Encoding.ASCII.GetBytes("This haystack does not contain a n-e-e-d-l-e");
var emptyNeedle = new byte[0];
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
// Act
var foundPosition = seekableStream.LastIndexOf(emptyNeedle);
}
}
public void SingleOccuranceAtEnd()
{
// Arrange
var haystackByteArray = Encoding.ASCII.GetBytes("haystack with a needle");
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
// Act
var foundPosition = seekableStream.LastIndexOf(needleByteArray);
// Assert
Assert.AreEqual(16, foundPosition);
}
}
public void NotInStream()
{
// Arrange
var haystackByteArray = Encoding.ASCII.GetBytes("This haystack does not contain a n-e-e-d-l-e");
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
// Act
var foundPosition = seekableStream.LastIndexOf(needleByteArray);
// Assert
Assert.AreEqual(-1, foundPosition);
}
}
public void EmptyStream()
{
// Arrange
var emptyByteArray = new byte[0];
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(emptyByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
// Act
var foundPosition = seekableStream.LastIndexOf(needleByteArray);
// Assert
Assert.AreEqual(-1, foundPosition);
}
}
public void MultipleOccurance()
{
// Arrange
var haystackByteArray = Encoding.ASCII.GetBytes("This hay stack has a needle here and another needle here and another needle here");
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
// Act
var foundPosition = seekableStream.LastIndexOf(needleByteArray);
// Assert
Assert.AreEqual(69, foundPosition);
}
}
public void EmptyStream()
{
// Arrange
var emptyByteArray = new byte[0];
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(emptyByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
seekableStream.Seek(0, SeekOrigin.End);
// Act
var foundPositions = seekableStream.IndexOfAllBackwards(needleByteArray);
// Assert
Assert.AreEqual(0, foundPositions.Length);
}
}
public void SingleOccuranceAtBeginning()
{
// Arrange
var haystackByteArray = Encoding.ASCII.GetBytes("needle in a haystack");
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
// Act
var foundPositions = seekableStream.IndexOfAll(needleByteArray);
// Assert
Assert.AreEqual(1, foundPositions.Length);
Assert.AreEqual(0, foundPositions[0]);
}
}
public void NotInStream()
{
// Arrange
var haystackByteArray = Encoding.ASCII.GetBytes("This haystack does not contain a n-e-e-d-l-e");
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
seekableStream.Seek(0, SeekOrigin.End);
// Act
var foundPositions = seekableStream.IndexOfAllBackwards(needleByteArray);
// Assert
Assert.AreEqual(0, foundPositions.Length);
}
}
public void SingleOccuranceAtEnd()
{
// Arrange
var haystackByteArray = Encoding.ASCII.GetBytes("haystack with a needle");
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
seekableStream.Seek(0, SeekOrigin.End);
// Act
var foundPositions = seekableStream.IndexOfAllBackwards(needleByteArray);
// Assert
Assert.AreEqual(1, foundPositions.Length);
Assert.AreEqual(16, foundPositions[0]);
}
}
public void MultipleOccuranceSelectTwo()
{
// Arrange
var haystackByteArray = Encoding.ASCII.GetBytes("This hay stack has a needle here and another needle here and another needle here");
var needleByteArray = Encoding.ASCII.GetBytes("needle");
using (var memStream = new MemoryStream(haystackByteArray))
using (var seekableStream = new SearchableStream(memStream))
{
// Act
var foundPositions = seekableStream.IndexOfAll(needleByteArray, 2);
// Assert
Assert.AreEqual(2, foundPositions.Length);
Assert.AreEqual(21, foundPositions[0]);
Assert.AreEqual(45, foundPositions[1]);
}
}