rpg-mcp

import { describe, it, expect } from 'vitest'; import { SpatialEngine, Point } from '../../src/engine/spatial/engine'; describe('SpatialEngine - Line of Sight', () => { const engine = new SpatialEngine(); // Helper to create a set of obstacle strings "x,y" const createObstacles = (points: Point[]): Set<string> => { return new Set(points.map(p => `${p.x},${p.y}`)); }; describe('hasLineOfSight', () => { it('should have LOS when no obstacles exist', () => { const start = { x: 0, y: 0 }; const end = { x: 5, y: 0 }; const obstacles = new Set<string>(); expect(engine.hasLineOfSight(start, end, obstacles)).toBe(true); }); it('should be blocked by an obstacle in a horizontal path', () => { const start = { x: 0, y: 0 }; const end = { x: 5, y: 0 }; const obstacles = createObstacles([{ x: 2, y: 0 }]); expect(engine.hasLineOfSight(start, end, obstacles)).toBe(false); }); it('should be blocked by an obstacle in a vertical path', () => { const start = { x: 0, y: 0 }; const end = { x: 0, y: 5 }; const obstacles = createObstacles([{ x: 0, y: 2 }]); expect(engine.hasLineOfSight(start, end, obstacles)).toBe(false); }); it('should be blocked by an obstacle in a diagonal path', () => { const start = { x: 0, y: 0 }; const end = { x: 3, y: 3 }; const obstacles = createObstacles([{ x: 2, y: 2 }]); expect(engine.hasLineOfSight(start, end, obstacles)).toBe(false); }); it('should have LOS if obstacle is not on the path', () => { const start = { x: 0, y: 0 }; const end = { x: 5, y: 0 }; const obstacles = createObstacles([{ x: 2, y: 1 }]); // One tile above expect(engine.hasLineOfSight(start, end, obstacles)).toBe(true); }); it('should allow LOS to adjacent tiles even if "blocked" (sanity check)', () => { // Usually you can always see adjacent tiles unless there's a wall BETWEEN them, // but in tile-based logic, if the target IS the wall, you can see it. // If the target is BEHIND a wall, you can't. // Here we test seeing TO an obstacle (should be true) vs THROUGH it. // Actually, hasLineOfSight usually means "can I see the center of the target tile?" // If the target tile is an obstacle, you can see it. // If there is an obstacle between start and end, you cannot. const start = { x: 0, y: 0 }; const end = { x: 2, y: 0 }; const obstacles = createObstacles([{ x: 1, y: 0 }]); // Obstacle in between expect(engine.hasLineOfSight(start, end, obstacles)).toBe(false); }); it('should allow LOS to the obstacle itself', () => { const start = { x: 0, y: 0 }; const end = { x: 2, y: 0 }; const obstacles = createObstacles([{ x: 2, y: 0 }]); // Target is obstacle expect(engine.hasLineOfSight(start, end, obstacles)).toBe(true); }); }); });