public void ReadingZeroBytesReturnsZeroWithoutThrowingException(int nbBytesAvailable, int limit, int readBufferLength)
{
var memoryStream = new MemoryStream(new byte[nbBytesAvailable]);
var limiterInputStream = new LimiterInputStream(memoryStream, limit);
var buffer = new byte[readBufferLength];
const int zeroBytesToRead = 0;
Assert.Equal(zeroBytesToRead, limiterInputStream.Read(buffer, zeroBytesToRead, zeroBytesToRead));
}
public void DoesNotThrow_WhenTheNumberOfBytesReadIsLessThanTheSpecifiedLimitAndThereAreEnoughBytesAvailable(int nbBytesAvailable, int limit, int readBufferLength)
{
Assert.True(nbBytesAvailable >= readBufferLength, "Invalid test case, not enough bytes available for reading.");
Assert.True(limit >= readBufferLength, "Invalid test case, limit should be greater than or equal to the number of bytes to read.");
var memoryStream = new MemoryStream(new byte[nbBytesAvailable]);
var limiterInputStream = new LimiterInputStream(memoryStream, limit);
var buffer = new byte[readBufferLength];
limiterInputStream.Read(buffer);
}
public void ThrowsStreamEndException_WhenEndOfStreamIsReachedBeforeHavingTheRequestedNumberOfBytes(int nbBytesAvailable, int limit, int readBufferLength)
{
Assert.True(nbBytesAvailable < readBufferLength, "Invalid test case, there should be less bytes available than the number of bytes to read.");
Assert.True(limit >= readBufferLength, "Invalid test case, limit should be greater than or equal to the number of bytes to read.");
var memoryStream = new MemoryStream(new byte[nbBytesAvailable]);
var limiterInputStream = new LimiterInputStream(memoryStream, limit);
var buffer = new byte[readBufferLength];
Assert.Throws <StreamEndException>(() =>
{
limiterInputStream.Read(buffer);
limiterInputStream.Read(buffer);
});
}
public void ReadThrowsWhenTheNumberOfBytesReadIsGreaterThanMax(int nbBytesAvailable, int limit, int readBufferLength)
{
Assert.True(nbBytesAvailable >= readBufferLength, "Invalid test case, the number of bytes available should be greater than or equal to the number of bytes to read.");
Assert.True(limit < readBufferLength, "Invalid test case, limit should be less than the number of bytes to read.");
var ex = Assert.Throws <StreamLimitException>(() =>
{
var memoryStream = new MemoryStream(new byte[nbBytesAvailable]);
var limiterInputStream = new LimiterInputStream(memoryStream, limit);
var buffer = new byte[readBufferLength];
limiterInputStream.Read(buffer);
});
Assert.Equal($"Maximum number of readable byte(s) reached (limit={limit}).", ex.Message);
}
public void NbRemainingBytes_IsUpdatedOnRead()
{
var memoryStream = new MemoryStream(new byte[200]);
var limiterInputStream = new LimiterInputStream(memoryStream, 100);
Assert.Equal(100, limiterInputStream.NbRemainingBytes);
limiterInputStream.Read(new byte[50]);
Assert.Equal(50, limiterInputStream.NbRemainingBytes);
limiterInputStream.Read(new byte[49]);
Assert.Equal(1, limiterInputStream.NbRemainingBytes);
limiterInputStream.Read(new byte[1]);
Assert.Equal(0, limiterInputStream.NbRemainingBytes);
}
