public void Encode_EncodeValidData_OutputImage()
{
var keywords = new Dictionary <string, Color>
{
{ "Hello", Color.Red },
{ "world", Color.Purple }
};
var image = PyxcellConvert.Encode("Hello world, how are you?", _defaultColours, keywords);
_output.WriteLine(image);
}
public void Encode_MessageLengthLimit_Exception()
{
// Arrange
var message = string.Empty;
for (int i = 0; i < 2500; i++)
{
message += "x";
}
// Act & Assert
Assert.Throws <ArgumentException>(() => PyxcellConvert.Encode(message, _defaultColours, new Dictionary <string, Color>()));
}
public void Encode_EmptyOrNullMessage_Exception()
{
// Arrange
var colours = new List <Color>()
{
Color.Cornsilk
};
// Act & Assert
Assert.Throws <ArgumentException>(() => PyxcellConvert.Encode("", colours, new Dictionary <string, Color>()));
Assert.Throws <ArgumentException>(() => PyxcellConvert.Encode(string.Empty, colours, new Dictionary <string, Color>()));
Assert.Throws <ArgumentException>(() => PyxcellConvert.Encode(null, colours, new Dictionary <string, Color>()));
}
public void Decode_Succesful_ReturnImage()
{
// Arrange & Act
var image = PyxcellConvert.Decode("HelloWorld.png");
// Assert
Assert.Equal(96, image.CharacterPatternMap.Count);
Assert.Equal("Hello world, how are you?", image.Message);
Assert.Contains("Hello", image.Keywords.Keys);
Assert.Contains("world", image.Keywords.Keys);
// ToDo: add colour tests because not all colours may be used due to random selection
}
private int[] DecodeGridPattern()
{
var(row, column) = PyxcellConvert.GetGridPosition(_gridNumber);
var pixelRow = _image.GetPixelRowSpan(row);
var pattern = new int[Constraints.GridSize];
for (int i = 0; i < pattern.Length; i++)
{
Color columnFill = new Rgba32(pixelRow[column + i].Rgba);
pattern[i] = columnFill == Color.Transparent ? 0 : 1;
}
return(pattern);
}
public void Encode_PatternLimit_Exception()
{
// Arrange
var colours = new List <Color>();
for (int i = 0; i < 128; i++)
{
var valueOne = Convert.ToByte(i % 256);
var byteMax = Convert.ToByte(255);
var byteMin = Convert.ToByte(0);
colours.Add(new Rgba32(valueOne, byteMax, byteMax));
}
// Act & Assert
Assert.Throws <Exception>(() => PyxcellConvert.Encode("Hello world!", colours, new Dictionary <string, Color>()));
}
public void Encode_KeywordColourInMainPalette_Exception()
{
// Arrange
var colours = new List <Color>
{
Color.Blue,
Color.Teal
};
var keywords = new Dictionary <string, Color>
{
{ "Hello", Color.Teal }
};
// Act & Assert
Assert.Throws <ArgumentException>(() => PyxcellConvert.Encode("Hello world", colours, keywords));
}
public void Draw(int[] pattern, Color colour)
{
var(row, column) = PyxcellConvert.GetGridPosition(_gridNumber);
for (int i = 0; i < pattern.Length; i++)
{
if (pattern[i] == 1)
{
var topLeft = new PointF(column + i, row);
var bottomRight = new PointF(topLeft.X + 1, topLeft.Y + Constraints.GridSize);
var line = new RectangularPolygon(topLeft, bottomRight);
_image.Mutate(x => x.Fill(colour, line));
}
}
_gridNumber++;
}
private Color DecodeGridColour()
{
var(row, column) = PyxcellConvert.GetGridPosition(_gridNumber);
var pixelRow = _image.GetPixelRowSpan(row);
Color colour = Color.Transparent;
for (int i = 0; i < Constraints.GridSize; i++)
{
colour = new Rgba32(pixelRow[column + i].Rgba);
if (colour != Color.Transparent)
{
break;
}
}
if (colour == Color.Transparent)
{
throw new Exception($"Could not find colour for grid {_gridNumber}.");
}
return(colour);
}
public void Encode_EmptyOrNullColours_Exception()
{
// Arrange, Act & Assert
Assert.Throws <ArgumentException>(() => PyxcellConvert.Encode("Hello world!", new List <Color>(), new Dictionary <string, Color>()));
Assert.Throws <ArgumentException>(() => PyxcellConvert.Encode("Hello world", null, new Dictionary <string, Color>()));
}
public void Decode_EmptyGrid_Exception()
{
// Arrange, Act & Assert
Assert.Throws <Exception>(() => PyxcellConvert.Decode("Empty.png"));
}
