2025-group-11a

Black-Box Testing Plan for Snake Rival

Functional Units Segmentation

First, we need to determine which functional units to test. From the game function, we can identify the following key functional units:

1. Player Snake Control System – Handles mouse input and movement
2. AI Snake Behavior System – Manages AI snake movement and decision-making
3. Collision Detection System – Handles collisions with boundaries, obstacles, food, and other snakes
4. Item System – Manages acquisition and effects of various items
5. Map Special Zones System – Includes swamp, desert, and teleport points

I will focus primarily on the Collision Detection System for black-box testing, as it is a core game mechanic and directly affects gameplay and fairness.

Identification of Input Categories

For the Collision Detection System, the following input categories can be identified:

1. Snake Head Position – Coordinates of the player and AI snake heads
2. Type of Collision Object, including:
   • Food
   • Item
   • Boundary
   • Obstacle
   • AI snake body
   • Player snake body
3. Snake State, including:
   • Normal state
   • Invincible state
   • Expanded detection range state

Identification of Constraints

Identifying constraints between different categories:

1. Player snake head colliding with boundary/obstacle:
   • Ends the game in normal state
   • Has no effect in invincible state
2. Player snake head colliding with AI snake:
   • Ends the game in normal state
   • Has no effect in invincible state
3. Player snake head colliding with food:
   • Requires direct contact in normal state
   • Can collect from a distance in expanded detection range state
4. AI snake head colliding with player snake body:
   • Causes AI snake to die and generate food and items

Definition of Test Cases

1. Boundary Collision Test

| Test Case | Input | Expected Output |
|———–|——-|——————|
| 1.1 | Player snake in normal state hits the map boundary | Game over, display “You hit the boundary!” |
| 1.2 | Player snake in invincible state hits the map boundary | Game continues, player takes no damage |
| 1.3 | Player snake approaches but does not touch boundary | Display boundary warning effect, game continues |

2. Obstacle Collision Test

| Test Case | Input | Expected Output |
|———–|——-|——————|
| 2.1 | Player snake in normal state hits an obstacle | Game over, display “You hit an obstacle!” |
| 2.2 | Player snake in invincible state hits an obstacle | Game continues, player takes no damage |

3. Snake-to-Snake Collision Test

| Test Case | Input | Expected Output |
|———–|——-|——————|
| 3.1 | Player snake in normal state hits AI snake body | Game over, display “You hit another snake!” |
| 3.2 | Player snake in invincible state hits AI snake body | Game continues, player takes no damage |
| 3.3 | AI snake head hits player snake body | AI snake dies, random number of food and items spawn, display “SNAKE DEFEATED!” banner |

4. Food Collision Test

| Test Case | Input | Expected Output |
|———–|——-|——————|
| 4.1 | Player snake in normal state touches food | Snake length increases, play eating sound effect, score increases |
| 4.2 | Player snake in expanded detection range state approaches food | Snake collects food without direct contact, length increases, play eating sound effect, score increases |

5. Item Collision Test

| Test Case | Input | Expected Output |
|———–|——-|——————|
| 5.1 | Player snake touches invincibility item | Invincible state activated, display banner, play item sound effect |
| 5.2 | Player snake touches stamina item | Stamina restored, display banner, play item sound effect |
| 5.3 | Player snake touches range expansion item | Expanded detection range state activated, display banner, play item sound effect |

6. Special Map Features Test

| Test Case | Input | Expected Output |
|———–|——-|——————|
| 6.1 | Player snake enters swamp area | Snake movement speed is reduced |
| 6.2 | Player snake enters teleport point | Snake is teleported to the corresponding target point, teleport effect and message shown |

Boundary Value Tests

Designing tests for specific input boundaries:

1. Food Detection Boundary Values:
   • In normal state, the distance between snake head and food is exactly gridSize * 0.8
   • In expanded detection range state, the distance is exactly gridSize * 2.2
2. Stamina Boundary Values:
   • Stamina value is exactly 0 when trying to speed up
   • Stamina is at maximum value when using a stamina item
3. Invincibility State Boundary Values:
   • Collision occurs 1 frame before invincibility ends
   • Collision occurs right after invincibility ends

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