TDD Go Logo

This project is an idea for a TDD exercise in using Go. It is pretty bare. You need to implement the real code!

Idea:

Create a basic Logo interpreter in Go lang. It can just be a small subset of the language like:

forward <pixels> 
right <deg>
left <deg> 
penup
pendown

See ACSLogo For Mac OS X as a real Logo implementation and to compare your output. ACSLogo’s help menu is a handy reference for Logo commands and usage.

Sample usage:

./tdd_go_logo <my_logo_file>

It will output the results to a PNG file.

To keep things simple, its not interactive and just outputs to a file.

The draw2d package can be used as an library to draw to an image.

See Samples for example code using the draw2d package.

Setup:

1. Install Go lang and set your GOPATH environment variable

2. Install the pre-requisite library freetype-go:

   go get code.google.com/p/freetype-go/freetype

3. Install the draw2d package:

   go get code.google.com/p/draw2d/draw2d

4. Run the example starting app:

   go build

   ./tdd_go_logo draw_square.txt

5. Check the resulting image:

   open Logo-output.png

6. Start TDDing your tests for the real implementation!

You can use the built-in testing package or something like goconvey.

Extensions:

• Display results in a window rather than a file
• Interactive use
• Support more Logo commands