/// <summary>
/// Initialize the colors and return the color pair
/// </summary>
internal static ColorPair[] InitializeColors()
{
// Set of major and minor colors in order
Color[] colorMapMajor = new Color[] { Color.White, Color.Red, Color.Black, Color.Yellow, Color.Violet };
Color[] colorMapMinor = new Color[] { Color.Blue, Color.Orange, Color.Green, Color.Brown, Color.SlateGray };
int majorLength = colorMapMajor.Length;
int minorLength = colorMapMinor.Length;
// Construct the color pair
ColorPair[] colorPairs = new ColorPair[majorLength * minorLength];
int pairIndex = 0;
for (int i = 0; i < majorLength; i++)
{
for (int j = 0; j < minorLength; j++)
{
ColorPair pair = new ColorPair()
{
MajorColor = colorMapMajor[i],
MinorColor = colorMapMinor[j]
};
colorPairs[pairIndex] = pair;
pairIndex++;
}
}
// return the color pairs
return(colorPairs);
}
/// <summary>
/// Find the index of the pair in
/// </summary>
/// <param name=""></param>
/// <returns></returns>
private static int FindPairNumber(ColorPair pair)
{
// Find the 0 based index in color pair array
int pairIndex = Array.FindIndex(colorPairs, item => ((item.MajorColor == pair.MajorColor) &&
(item.MinorColor == pair.MinorColor)));
// Compute pair number and Return
// (Note: +1 is because pair number is 1 based, not zero based index)
return(pairIndex == -1 ? -1 : pairIndex + 1);
}
/// <summary>
/// Given the two colors the function returns the pair number corresponding to them
/// </summary>
/// <param name="pair">Color pair with major and minor color</param>
/// <returns></returns>
internal static int GetPairNumberFromColor(ColorPair pair)
{
// Find the 0 based index in color pair array
int pairIndex = FindPairNumber(pair);
// If colors can not be found throw an exception
if (pairIndex == -1)
{
throw new ArgumentException(
string.Format("Unknown Colors: {0}", pair.ToString()));
}
return(pairIndex);
}
/// <summary>
/// Given a pair number function returns the major and minor colors in that order
/// </summary>
/// <param name="pairNumber">Pair number of the color to be fetched</param>
/// <returns></returns>
internal static ColorPair GetColorFromPairNumber(int pairNumber)
{
// The function supports only 1 based index. Pair numbers valid are from 1 to 25
if (!IsValidPairNumber(pairNumber))
{
throw new ArgumentOutOfRangeException(
string.Format("Argument PairNumber:{0} is outside the allowed range", pairNumber));
}
// Construct the return val from the values, note pair number is 1 based
ColorPair pair = new ColorPair(colorPairs[pairNumber - 1]);
// return the value
return(pair);
}
/// <summary>
/// Test for correct data
/// </summary>
internal void PositiveTestGetColor()
{
// Positive case 1
int pairNumber = 5;
ColorPair testPair1 = ColorCodeRegistry.GetColorFromPairNumber(pairNumber);
Console.WriteLine("[In]Pair Number: {0},[Out] Colors: {1}\n", pairNumber, testPair1);
Debug.Assert(testPair1.MajorColor == Color.White);
Debug.Assert(testPair1.MinorColor == Color.SlateGray);
// Positive case 2
pairNumber = 24;
testPair1 = ColorCodeRegistry.GetColorFromPairNumber(pairNumber);
Console.WriteLine("[In]Pair Number: {0},[Out] Colors: {1}\n", pairNumber, testPair1);
Debug.Assert(testPair1.MajorColor == Color.Violet);
Debug.Assert(testPair1.MinorColor == Color.Brown);
}
/// <summary>
/// Test for incorrect data
/// </summary>
private void NegativeTestGetColor()
{
// Negatice test case with wrong pair number as input to simulate error condition
int pairNumber = 0;
bool errorConditionHandled = false;
try
{
ColorPair testPair1 = ColorCodeRegistry.GetColorFromPairNumber(pairNumber);
Console.WriteLine("[In]Pair Number: {0},[Out] Colors: {1}\n", pairNumber, testPair1);
}
catch (Exception)
{
errorConditionHandled = true;
Console.WriteLine("Invalid Pair Number : {0}, Error Condition handled\n", pairNumber);
}
Debug.Assert(errorConditionHandled);
}
/// <summary>
/// Test for incorrect data
/// </summary>
private void NegativeTestGetPair()
{
// negative test case with wrong color as input to simulate error condition
bool errorConditionHandled = false;
ColorPair testPair2 = new ColorPair()
{
MajorColor = Color.Red, MinorColor = Color.Maroon
};
try
{
int pairNumber = ColorCodeRegistry.GetPairNumberFromColor(testPair2);
Console.WriteLine("[In]Colors: {0}, [Out] PairNumber: {1}\n", testPair2, pairNumber);
}
catch (Exception)
{
errorConditionHandled = true;
Console.WriteLine("Invalid Color : {0}, Error Condition handled\n", testPair2);
}
Debug.Assert(errorConditionHandled);
}
/// <summary>
/// Test for correct data
/// </summary>
private void PositiveTestGetPair()
{
// Positive case 1
ColorPair testPair2 = new ColorPair()
{
MajorColor = Color.Yellow, MinorColor = Color.Blue
};
int pairNumber = ColorCodeRegistry.GetPairNumberFromColor(testPair2);
Console.WriteLine("[In]Colors: {0}, [Out] PairNumber: {1}\n", testPair2, pairNumber);
Debug.Assert(pairNumber == 16);
// Positive case 2
testPair2 = new ColorPair()
{
MajorColor = Color.Red, MinorColor = Color.Green
};
pairNumber = ColorCodeRegistry.GetPairNumberFromColor(testPair2);
Console.WriteLine("[In]Colors: {0}, [Out] PairNumber: {1}\n", testPair2, pairNumber);
Debug.Assert(pairNumber == 8);
}
/// <summary>
/// Copy ctor
/// </summary>
/// <param name="pair"></param>
public ColorPair(ColorPair pair)
{
MajorColor = pair.MajorColor;
MinorColor = pair.MinorColor;
}
