public void Throws_StreamTooSmall_When_Stream_Empty()
{
// empty memory stream
using (MemoryStream stream = new MemoryStream())
{
Assert.Throws <Exceptions.StreamTooSmallException>(() => Jpeg.GetDimensions(stream));
}
}
public void Should_Read_From_SOF2()
{
using (Stream fileStream = File.OpenRead(@"testimages\SOF2_800x600.jpg"))
{
Dimensions dimensions = Jpeg.GetDimensions(fileStream);
Assert.Equal(800, dimensions.Width);
Assert.Equal(600, dimensions.Height);
}
}
public void Should_Read_From_SOF0()
{
using (Stream fileStream = File.OpenRead(@"testimages\SOF0_1280x853.jpg"))
{
Dimensions dimensions = Jpeg.GetDimensions(fileStream);
Assert.Equal(1280, dimensions.Width);
Assert.Equal(853, dimensions.Height);
}
}
public void Should_Read_From_SOF0_With_CMYK()
{
// this image has I higher number of components than normal because of photometric interpretation CMYK
using (Stream fileStream = File.OpenRead(@"testimages\CMYK_SOF0_5100x3300.jpg"))
{
Dimensions dimensions = Jpeg.GetDimensions(fileStream);
Assert.Equal(5100, dimensions.Width);
Assert.Equal(3300, dimensions.Height);
}
}
public void Should_Read_From_Image_With_Bad_Segment_Size()
{
// this image has a bad segment size that must be recovered from, it also has LOADS of metadata
using (Stream fileStream = File.OpenRead(@"testimages\Bad_Segment_Size_4596x3418.jpg"))
{
Dimensions dimensions = Jpeg.GetDimensions(fileStream);
Assert.Equal(4596, dimensions.Width);
Assert.Equal(3418, dimensions.Height);
}
}
public void Throws_StreamTooSmallException_When_Stream_Too_Small()
{
/*
* This test make sure that it is performing checked reads.
* It should throw when it tries to read but the stream is empty
*/
// this has the file marker but no oihers so it should throw when trying to read the next header
byte[] shortImage = new byte[]
{
0xff,
Markers.FileMarker
};
using (MemoryStream stream = new MemoryStream(shortImage))
{
Assert.Throws <Exceptions.StreamTooSmallException>(() => Jpeg.GetDimensions(stream));
}
}
public void Throws_InvalidJpeg_When_FileMarker_Missing()
{
byte[] missingHeader = new byte[10];
using (MemoryStream stream = new MemoryStream(missingHeader))
{
// all bytes are 0 to start with
Assert.Throws <Exceptions.InvalidJpegException>(() => Jpeg.GetDimensions(stream));
}
// set the first byte to be valid to make sure it is checking second byte as well
missingHeader[0] = 0xff;
using (MemoryStream stream = new MemoryStream(missingHeader))
{
// all 0 bytes to start with
Assert.Throws <Exceptions.InvalidJpegException>(() => Jpeg.GetDimensions(stream));
}
}
public void Throws_AgrNull_When_Null_Stream()
{
Assert.Throws <ArgumentNullException>(() => Jpeg.GetDimensions(null));
}