public static MagicNumberMapping GetAllMappings()
{
var magicNumberMapping = new MagicNumberMapping();
foreach (var magicNumber in ImageMagicNumbers.BMPMagicNumbers)
{
magicNumberMapping.AddMagicNumber(magicNumber, ImageMagicNumbers.BMP);
}
foreach (var magicNumber in ImageMagicNumbers.GIFMagicNumbers)
{
magicNumberMapping.AddMagicNumber(magicNumber, ImageMagicNumbers.GIF);
}
foreach (var magicNumber in ImageMagicNumbers.JPEGMagicNumbers)
{
magicNumberMapping.AddMagicNumber(magicNumber, ImageMagicNumbers.JPEG);
}
foreach (var magicNumber in ImageMagicNumbers.PNGMagicNumbers)
{
magicNumberMapping.AddMagicNumber(magicNumber, ImageMagicNumbers.PNG);
}
foreach (var magicNumber in DocumentMagicNumbers.PDFMagicNumbers)
{
magicNumberMapping.AddMagicNumber(magicNumber, DocumentMagicNumbers.PDF);
}
return(magicNumberMapping);
}
public static MagicNumberMapping CreateMappingWithSingleMagicNumber(byte?[] magicNumber, string fileType)
{
var fileMagicNumberMapping = new MagicNumberMapping();
fileMagicNumberMapping.AddMagicNumber(magicNumber, fileType);
return(fileMagicNumberMapping);
}
public void AddMagicNumber_ArgumentException_Tests(byte?[] magicNumber, string fileType)
{
// Arrange
var magicNumberMapping = new MagicNumberMapping();
magicNumberMapping.FileMagicNumberMappingTable.Should().BeEmpty("there should not be any existing mappings");
// Act
Action act = () => magicNumberMapping.AddMagicNumber(magicNumber, fileType);
// Assert
act.Should().Throw <ArgumentException>("the input is bad and should provoke an exception");
}
public void AddMagicNumber_Positive()
{
// Arrange
var magicNumber = ValidMagicNumber;
var fileType = "test";
// Act
var magicNumberMapping = new MagicNumberMapping();
magicNumberMapping.AddMagicNumber(magicNumber, fileType);
// Assert
magicNumberMapping.FileMagicNumberMappingTable.Should().HaveCount(1, "a mapping should have been added");
}
public void GetLongestMagicNumber_Positive()
{
// Arrange
var longestMagicNumberToAdd = 10;
var fileMagicNumberMapping = new MagicNumberMapping();
for (var i = 1; i <= longestMagicNumberToAdd; i++)
{
var magicNumber = Enumerable.Repeat(new byte?(1), i).ToArray();
var type = i.ToString();
fileMagicNumberMapping.AddMagicNumber(magicNumber, type);
}
// Act
var longestMagicNumber = fileMagicNumberMapping.GetLongestMagicNumber();
// Assert
longestMagicNumber.Should().Be(longestMagicNumberToAdd);
}