rpg-mcp

import { describe, it, expect } from 'vitest'; import { DiceEngine } from '../../src/math/dice'; describe('DiceEngine', () => { it('should parse dice expressions correctly', () => { const engine = new DiceEngine(); expect(engine.parse('2d6+4')).toEqual({ count: 2, sides: 6, modifier: 4, explode: false }); expect(engine.parse('1d20-2')).toEqual({ count: 1, sides: 20, modifier: -2, explode: false }); expect(engine.parse('3d8')).toEqual({ count: 3, sides: 8, modifier: 0, explode: false }); expect(engine.parse('2d6!')).toEqual({ count: 2, sides: 6, modifier: 0, explode: true }); }); it('should be deterministic with seeds', () => { const seed = 'test-seed'; const engine1 = new DiceEngine(seed); const engine2 = new DiceEngine(seed); const result1 = engine1.roll('1d20'); const result2 = engine2.roll('1d20'); expect(result1.result).toBe(result2.result); expect(result1.metadata?.rolls).toEqual(result2.metadata?.rolls); }); it('should handle modifiers', () => { const engine = new DiceEngine('modifier-test'); // Mock RNG or just check math // With seed 'modifier-test', 1d6 might be specific. // Let's just check if result = sum + modifier const result = engine.roll('2d6+5'); const rolls = result.metadata?.rolls as number[]; const sum = rolls.reduce((a, b) => a + b, 0); expect(result.result).toBe(sum + 5); }); it('should handle exploding dice', () => { // We need a seed that triggers explosion. // This is hard to guess without trial, but we can mock if we refactor. // For now, let's just ensure it runs without error. const engine = new DiceEngine(); const result = engine.roll('10d4!'); // High chance of explosion expect(result.result).toBeGreaterThanOrEqual(10); }); it('should handle advantage', () => { const engine = new DiceEngine(); const result = engine.roll({ count: 1, sides: 20, modifier: 0, advantage: true }); expect(result.steps).toEqual(expect.arrayContaining([expect.stringMatching(/Advantage: Taken/)])); }); });