How to use .NET User Secrets in MSTest classes

When developing unit and integration tests, we don't necessarily want to share the secret keys and values we use as credentials for APIs, databases, etc.

So similarly to how we implement User Secret functionality in Program.cs, we can implement User Secrets and set test class variables that use the secrets via the MSTest classes' constructor (ReferenceDataTests() below):

  public static string upsId = "";  
  public static string upsSecret = "";  
  private IConfiguration _configuration { get; }  
  
  public ReferenceDataTests()  
  {  
    // set your API ids and secrets in UserSecrets (right-click project: "Manage User Secrets")  
    var builder = new ConfigurationBuilder()  
      .AddUserSecrets<ReferenceDataTests>();  
    _configuration = builder.Build(); 
    
    var secretVals = _configuration.GetChildren().ToList();  
    upsId = secretVals.Where(x => x.Key == "upsId").First().Value!;  
    upsSecret = secretVals.Where(x => x.Key == "upsSecret").First().Value!;   
  }  

Reference: https://stackoverflow.com/questions/41941503/how-to-use-user-secrets-in-a-dotnet-core-test-project

ASCII art fun with .NET

My friend Benn with a nice largemouth bass

And here we have a simple function. Many thanks to its originator, Thinathayalan Ganesan.

You can find this in the Sonrai.ExtRS Nuget project under Sonrai.ExtRS.FormattingService.ConvertToAscii(Bitmap image) and see how it is used in Sonrai.ExtRS.FormattingTests.ConvertToAsciiSucceeds.

I talked a bit about how ASCII art works in a post on a similar Python script.

  // credit (Thinathayalan Ganesan): https://www.c-sharpcorner.com/article/generating-ascii-art-from-an-image-using-C-Sharp  
  public static string ConvertToAscii(Bitmap image)  
  {  
    string[] _AsciiChars = { "#", "#", "@", "%", "=", "+", "*", ":", "-", ".", " " };  
    Boolean toggle = false;  
    StringBuilder sb = new StringBuilder();  
    for (int h = 0; h < image.Height; h++)  
    {  
      for (int w = 0; w < image.Width; w++)  
      {  
        Color pixelColor = image.GetPixel(w, h);  
        //Average out the RGB components to find the Gray Color  
        int red = (pixelColor.R + pixelColor.G + pixelColor.B) / 3;  
        int green = (pixelColor.R + pixelColor.G + pixelColor.B) / 3;  
        int blue = (pixelColor.R + pixelColor.G + pixelColor.B) / 3;  
        Color grayColor = Color.FromArgb(red, green, blue);  
        //Use the toggle flag to minimize height-wise stretch  
        if (!toggle)  
        {  
          int index = (grayColor.R * 10) / 255;  
          sb.Append(_AsciiChars[index]);  
        }  
      }  
      if (!toggle)  
      {  
        sb.Append("\r\n");  
        toggle = true;  
      }  
      else  
      {  
        toggle = false;  
      }  
    }  
    return sb.ToString();  
  }  

The key is the assignment, pixel-by-pixel, of values to the reb, blue and green variables (and then "grayColor" variable) under the comment "Average out the RGB components to find the Gray Color". By getting the average of all colors in the pixel you can get the grayScale RGB color from Color.FromArgb(R, G, B). This grayscale RGB color is then used to select the appropriate ASCII character to represent the shade of gray in each pixel of the image.

• A darker pixel of an image will use an ASCII character like a "." or "-" or ":".

• A lighter pixel of an image will use an ASCII character like a "#" or "@" or "%".

In this way we can easily convert an image from its pixel-based source representation to an ASCII character representation. Essentially, a computer image is just a mosaic, or a composite of parts (pixels usually, sometimes ASCII characters- for art and fun!). 😃

Reference: https://www.c-sharpcorner.com/article/generating-ascii-art-from-an-image-using-C-Sharp