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A WebGPU retro game engine for TypeScript, inspired by RetroBlit. Build pixel-perfect 2D games with a clean, fantasy-console-style API.
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495/** * Unit tests for {@link BarrelDistortion}. * * Validates GPU resource creation, uniform layout, encode pass, and dispose * lifecycle. Visual correctness is covered by the post-process visual * regression suite (`tests/visual/post-process.spec.ts`). */
import { afterAll, beforeAll, describe, expect, it, vi } from 'vitest';
import { createMockGPUDevice, installMockNavigatorGPU, uninstallMockNavigatorGPU } from '../../../__test__/webgpu-mock';import { Vector2i } from '../../../utils/Vector2i';import { BarrelDistortion } from './BarrelDistortion';
const FORMAT: GPUTextureFormat = 'bgra8unorm';const SIZE = new Vector2i(1280, 960);
beforeAll(() => { installMockNavigatorGPU();});
afterAll(() => { uninstallMockNavigatorGPU();});
describe('BarrelDistortion', () => { it("declares tier='display'", () => { expect(new BarrelDistortion().tier).toBe('display'); });
it('init creates a pipeline, uniform buffer, and sampler', () => { const device = createMockGPUDevice(); const createPipeline = vi.spyOn(device, 'createRenderPipeline'); const createBuffer = vi.spyOn(device, 'createBuffer'); const createSampler = vi.spyOn(device, 'createSampler'); const fx = new BarrelDistortion();
fx.init(device, FORMAT, SIZE);
expect(createPipeline).toHaveBeenCalledTimes(1); expect(createBuffer).toHaveBeenCalledTimes(1); expect(createSampler).toHaveBeenCalledTimes(1); expect(createBuffer.mock.calls[0]?.[0]?.size).toBe(16); });
it('updateUniforms writes resolution and curvature', () => { const device = createMockGPUDevice(); const writeBuffer = vi.spyOn(device.queue, 'writeBuffer'); const fx = new BarrelDistortion(); fx.curvature = 0.07;
fx.init(device, FORMAT, SIZE); fx.updateUniforms(16, new Vector2i(640, 480));
expect(writeBuffer).toHaveBeenCalledTimes(1); const buf = writeBuffer.mock.calls[0]?.[2] as Float32Array; expect(buf[0]).toBe(640); expect(buf[1]).toBe(480); expect(buf[2]).toBeCloseTo(0.07); });
it('encodePass begins a render pass against destView and draws', () => { const device = createMockGPUDevice(); const fx = new BarrelDistortion(); fx.init(device, FORMAT, SIZE);
const encoder = device.createCommandEncoder(); const beginSpy = vi.spyOn(encoder, 'beginRenderPass');
fx.encodePass( encoder, { label: 'src' } as unknown as GPUTextureView, { label: 'dst' } as unknown as GPUTextureView, );
expect(beginSpy).toHaveBeenCalledTimes(1); const passDescriptor = beginSpy.mock.calls[0]?.[0]; const firstColorAttachment = passDescriptor?.colorAttachments ? [...passDescriptor.colorAttachments][0] : undefined; expect(firstColorAttachment?.view.label).toBe('dst'); });
it('dispose destroys the uniform buffer and clears state', () => { const device = createMockGPUDevice(); const fx = new BarrelDistortion(); fx.init(device, FORMAT, SIZE);
// No throw. fx.dispose(); // Second dispose is a no-op. fx.dispose(); });});