File Unit Test 2.1

If there are temp.sb or temp.svg, remove them before testing.

1. Draw a triangle, save as temp.sb . Run temp.sb and check the shape is a triangle.
2. Draw a rectangle, save as temp.svg . Open temp.svg from GIMP and check the shape is a rectangle.
3. Open temp.sb, add an ellipse, save as temp.sb . Run temp.sb and check the shapes are a triangle and an ellipse.
4. Open temp.sb, delete a triangle, save as temp.svg . Open temp.svg from GIMP and check the shape is an ellipse.
5. Open temp.svg, add a line, save as temp.svg . Open temp.svg from GIMP and check the shapes are an ellipse and a line.
6. Open temp.svg, delete an ellipse, save as temp.sb . Run temp.sb and check the shape is a line.