3.1 KiB
Spec Delta
Purpose
Defines Conway's Game of Life simulation behavior, including ticking, pause/resume, stepping, speed control, and paused-only cell editing.
ADDED Requirements
Requirement: Simulation applies Conway's rules
The system SHALL advance the grid by one generation per tick using Conway's rules with wall boundaries.
Scenario: Tick advances grid
- WHEN a tick occurs
- THEN each cell's next state follows Conway's rules based on its eight neighbors
Requirement: Simulation starts paused
The system SHALL start with the simulation paused.
Scenario: Initial state
- WHEN the application starts
- THEN the simulation is paused
Requirement: Pause can be toggled
The system SHALL toggle between paused and running when the pause action is triggered.
Scenario: Toggle pause
- WHEN the user triggers the pause action
- THEN the simulation switches between paused and running
Requirement: Single step advances one generation
The system SHALL advance exactly one generation when the step action is triggered while paused.
Scenario: Step while paused
- WHEN the simulation is paused and the user triggers step
- THEN the grid advances by one generation
- AND the simulation remains paused
Requirement: Step is ignored while running
The system SHALL ignore the step action while the simulation is running.
Scenario: Step while running
- WHEN the simulation is running and the user triggers step
- THEN no extra generation is applied
Requirement: Speed is adjustable
The system SHALL change the tick interval when speed_up or speed_down is triggered, within supported bounds.
Scenario: Speed up
- WHEN the user triggers speed_up
- THEN the tick interval decreases (simulation runs faster)
Scenario: Speed down
- WHEN the user triggers speed_down
- THEN the tick interval increases (simulation runs slower)
Requirement: Cell editing only while paused
The system SHALL allow editing cells only while the simulation is paused.
Scenario: Edit while paused
- WHEN the simulation is paused and the user clicks a cell
- THEN the cell state changes according to the mouse button
Scenario: No edit while running
- WHEN the simulation is running and the user clicks a cell
- THEN the grid is not modified by the click
Requirement: Left click sets cell alive
The system SHALL set the clicked cell to alive when the left mouse button is pressed while paused.
Scenario: Set alive
- WHEN the simulation is paused and the user left-clicks a cell
- THEN that cell becomes alive
Requirement: Right click sets cell dead
The system SHALL set the clicked cell to dead when the right mouse button is pressed while paused.
Scenario: Set dead
- WHEN the simulation is paused and the user right-clicks a cell
- THEN that cell becomes dead
Requirement: Drag paints cells
The system SHALL paint cells while dragging with the left button (alive) or right button (dead) while paused.
Scenario: Drag paint
- WHEN the simulation is paused and the user drags with left button held
- THEN cells under the cursor become alive