Add tests and move constants to config

src/game/__tests__/simulation.test.ts

@@ -0,0 +1,125 @@
+import { describe, it, expect } from 'vitest';
+import { applyAction } from '../simulation';
+import { type World, type Actor, type EntityId } from '../types';
+
+describe('Combat Simulation', () => {
+  const createTestWorld = (actors: Map<EntityId, Actor>): World => ({
+    width: 10,
+    height: 10,
+    tiles: new Array(100).fill(0),
+    actors,
+    exit: { x: 9, y: 9 }
+  });
+
+  describe('applyAction - attack', () => {
+    it('should deal damage when player attacks enemy', () => {
+      const actors = new Map<EntityId, Actor>();
+      actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 }
+      });
+      actors.set(2, {
+        id: 2,
+        isPlayer: false,
+        pos: { x: 4, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 10, hp: 10, attack: 3, defense: 1 }
+      });
+
+      const world = createTestWorld(actors);
+      const events = applyAction(world, 1, { type: 'attack', targetId: 2 });
+
+      const enemy = world.actors.get(2)!;
+      expect(enemy.hp).toBeLessThan(10);
+      
+      // Should have attack event
+      expect(events.some(e => e.type === 'attacked')).toBe(true);
+    });
+
+    it('should kill enemy when damage exceeds hp', () => {
+      const actors = new Map<EntityId, Actor>();
+      actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 20, hp: 20, attack: 50, defense: 2 }
+      });
+      actors.set(2, {
+        id: 2,
+        isPlayer: false,
+        pos: { x: 4, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 10, hp: 10, attack: 3, defense: 1 }
+      });
+
+      const world = createTestWorld(actors);
+      const events = applyAction(world, 1, { type: 'attack', targetId: 2 });
+
+      // Enemy should be removed from world
+      expect(world.actors.has(2)).toBe(false);
+      
+      // Should have killed event
+      expect(events.some(e => e.type === 'killed')).toBe(true);
+    });
+
+    it('should apply defense to reduce damage', () => {
+      const actors = new Map<EntityId, Actor>();
+      actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 }
+      });
+      actors.set(2, {
+        id: 2,
+        isPlayer: false,
+        pos: { x: 4, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 10, hp: 10, attack: 3, defense: 3 }
+      });
+
+      const world = createTestWorld(actors);
+      const events = applyAction(world, 1, { type: 'attack', targetId: 2 });
+
+      const enemy = world.actors.get(2)!;
+      const damage = 10 - enemy.stats!. hp;
+      
+      // Damage should be reduced by defense (5 attack - 3 defense = 2 damage)
+      expect(damage).toBe(2);
+    });
+  });
+
+  describe('applyAction - move', () => {
+    it('should move actor to new position', () => {
+      const actors = new Map<EntityId, Actor>();
+      actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 }
+      });
+
+      const world = createTestWorld(actors);
+      const events = applyAction(world, 1, { type: 'move', dx: 1, dy: 0 });
+
+      const player = world.actors.get(1)!;
+      expect(player.pos).toEqual({ x: 4, y: 3 });
+      
+      // Should have moved event
+      expect(events.some(e => e.type === 'moved')).toBe(true);
+    });
+  });
+});