public void GetRotationParametersForImage_ImageMisOriented_ReturnsCorrectEncoderParameters(ImageOrientation orientation, EncoderValue[] expectedValues)
{
// Arrange
var image = Fake.Image(orientation);
var factory = Fake.ImageFactory(image);
var rotator = new ImageRotator(factory);
// Act
var parameters = rotator.GetRotationParameters(image);
// Assert
Assert.IsNotNull(parameters);
Assert.AreEqual(expectedValues.Length, parameters.Param.Length);
foreach (var val in expectedValues)
{
Assert.IsTrue(parameters.Param.Any(param =>
{
var valueField = param.GetType().GetField("_parameterValue", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
var valuePointer = (IntPtr)valueField.GetValue(param);
var value = (EncoderValue)Marshal.ReadInt32(valuePointer);
return(param.Encoder.Guid == Encoder.Transformation.Guid &&
param.NumberOfValues == 1 &&
param.ValueType == EncoderParameterValueType.ValueTypeLong &&
value == val);
}));
}
}
public void GetRotationParametersForImage_ImageNull_ThrowsArgumentException()
{
// Arrange
var factory = Fake.ImageFactory(Fake.Image());
var rotator = new ImageRotator(factory);
// Act, Assert
Assert.Throws <ArgumentException>(() => rotator.GetRotationParameters((IImage)null));
}
public void GetRotationParametersForImage_OrientationIsTopLeft_ReturnsNull()
{
// Arrange
var image = Fake.Image(ImageOrientation.TopLeft);
var factory = Fake.ImageFactory(image);
var rotator = new ImageRotator(factory);
// Act
var parameters = rotator.GetRotationParameters(image);
// Assert
Assert.IsNull(parameters);
}
