rpg-mcp

import { describe, it, expect } from 'vitest'; import { generateRegions, RegionGenerationOptions } from '../../src/engine/worldgen/regions'; import { BiomeType } from '../../src/schema/biome'; describe('Region Generation', () => { const width = 50; const height = 50; const size = width * height; // Mock inputs const elevation = new Uint8Array(size); const biomes: BiomeType[][] = Array.from({ length: height }, () => Array(width).fill(BiomeType.GRASSLAND)); // Create a simple island for (let y = 0; y < height; y++) { for (let x = 0; x < width; x++) { const dx = x - width / 2; const dy = y - height / 2; const dist = Math.sqrt(dx * dx + dy * dy); if (dist < 20) { elevation[y * width + x] = 50; // Land } else { elevation[y * width + x] = 10; // Ocean biomes[y][x] = BiomeType.OCEAN; } } } it('should be deterministic', () => { const options: RegionGenerationOptions = { seed: 'test-seed', width, height, elevation, biomes, numRegions: 5 }; const result1 = generateRegions(options); const result2 = generateRegions(options); expect(result1.regionMap).toEqual(result2.regionMap); expect(result1.regions).toEqual(result2.regions); }); it('should generate the requested number of regions (approx)', () => { const options: RegionGenerationOptions = { seed: 'count-test', width, height, elevation, biomes, numRegions: 5 }; const result = generateRegions(options); // It might be slightly less if seeds land in ocean or merge, but should be close expect(result.regions.length).toBeGreaterThan(0); expect(result.regions.length).toBeLessThanOrEqual(5); }); it('should assign every land tile to a region', () => { const options: RegionGenerationOptions = { seed: 'coverage-test', width, height, elevation, biomes, numRegions: 5 }; const result = generateRegions(options); const { regionMap } = result; for (let i = 0; i < size; i++) { if (elevation[i] >= 20) { // Land expect(regionMap[i]).toBeGreaterThanOrEqual(0); } } }); it('should not assign ocean tiles to a region', () => { const options: RegionGenerationOptions = { seed: 'ocean-test', width, height, elevation, biomes, numRegions: 5 }; const result = generateRegions(options); const { regionMap } = result; for (let i = 0; i < size; i++) { if (elevation[i] < 20) { // Ocean expect(regionMap[i]).toBe(-1); // -1 for no region } } }); });