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#### Functional
- Try to run the program.
- Does the program compile and run without any error or warning?
- Set one or more control points by left-clicking on the canvas.
- Confirm that the program allows you to mark these control points.
- Check if the program draws a small circle around the control points for identification purposes.
- Set three or more control points on the canvas and press `Enter`.
- Observe whether Chaikin's algorithm starts the animation.
- To exit the program, press the `Escape` key.
- Ensure the program exits without any errors.
- Start the program and set only one control point by left-clicking on the canvas. Then, press `Enter`.
- Confirm that only the selected control point is visible, and nothing else changes.
- Restart the program, set two control points by left-clicking on the canvas, and press `Enter`.
- Check if only a straight line is drawn between the two control points.
- Restart the program, set three or more control points by left-clicking on the canvas, and press `Enter`.
- Confirm that the animation completes 7 steps before restarting.
- Restart the program, set three or more control points by left-clicking on the canvas, and press `Enter`. Then, press `Escape` to exit the program.
- Verify that the program exits without any errors.
- Start the program and press `Enter` without selecting any points.
- Check if the program continues without any errors.
- After pressing `Enter` without selecting points, try placing points without needing to restart the program.
#### Bonus Features
- Check if a message is displayed when you press `Enter` without drawing any points, reminding you to add points.
- Verify if you can clear the screen and add new control points without restarting the program.
- Check if it's possible to drag the control points in real time and observe the generation of a new curve.