public void SetLengthShouldNotBeAllowed()
{
// arrange
var stream = new EmptyStream(0L);
// act
var ex = Assert.Throws <NotSupportedException>(() => stream.SetLength(100L));
// assert
}
public void SeekShouldNotAllowOffsetOutOfRange(long length, long offset, SeekOrigin origin)
{
// arrange
var stream = new EmptyStream(length);
// act
var ex = Assert.Throws <ArgumentOutOfRangeException>(() => stream.Seek(offset, origin));
// assert
Assert.Equal(nameof(offset), ex.ParamName);
}
public void PositionShouldNotAllowValueOutOfRange(long length, long position)
{
// arrange
var stream = new EmptyStream(length);
// act
var ex = Assert.Throws <ArgumentOutOfRangeException>(() => stream.Position = position);
// assert
Assert.Equal("value", ex.ParamName);
}
public void SeekShouldMoveToExpectedPosition(long length, long offset, SeekOrigin origin, long expected)
{
// arrange
var stream = new EmptyStream(length);
// act
var actual = stream.Seek(offset, origin);
// assert
Assert.Equal(expected, actual);
}
public void ConstructorShouldSetExpectedLength()
{
// arrange
var length = 100L;
// act
var stream = new EmptyStream(length);
// assert
Assert.Equal(length, stream.Length);
}
public void WriteShouldNotBeAllowed()
{
// arrange
var buffer = new byte[100];
var stream = new EmptyStream(0L);
// act
var ex = Assert.Throws <NotSupportedException>(() => stream.Write(buffer, 0, buffer.Length));
// assert
}
public void CanWriteShouldBeFalse()
{
// arrange
var expected = false;
var stream = new EmptyStream(0L);
// act
var actual = stream.CanWrite;
// assert
Assert.Equal(expected, actual);
}
public void CanSeekShouldBeTrue()
{
// arrange
var expected = true;
var stream = new EmptyStream(0L);
// act
var actual = stream.CanSeek;
// assert
Assert.Equal(expected, actual);
}
public void PositionShouldBeUpdateableWithinRange()
{
// arrange
var expected = 50L;
var stream = new EmptyStream(100L);
// act
stream.Position = expected;
var actual = stream.Position;
// assert
Assert.Equal(expected, actual);
}
public void ReadShouldConsumeStream(int size, long length)
{
// arrange
var expected = length - 1;
var buffer = new byte[size];
var stream = new EmptyStream(length);
var count = 0;
// act
while ((count = stream.Read(buffer, 0, size)) > 0)
{
;
}
var actual = stream.Position;
// assert
Assert.Equal(expected, actual);
}
