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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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import { createMockGPUDevice, installMockNavigatorGPU, uninstallMockNavigatorGPU } from '../../../__test__/webgpu-mock';import { Vector2i } from '../../../utils/Vector2i';import { RollLine } from './RollLine';
const FORMAT: GPUTextureFormat = 'bgra8unorm';const SIZE = new Vector2i(1280, 960);
beforeAll(() => { installMockNavigatorGPU();});
afterAll(() => { uninstallMockNavigatorGPU();});
describe('RollLine', () => { it("declares tier='display'", () => { expect(new RollLine().tier).toBe('display'); });
it('init allocates a 32-byte uniform buffer', () => { const device = createMockGPUDevice(); const createBuffer = vi.spyOn(device, 'createBuffer'); const fx = new RollLine();
fx.init(device, FORMAT, SIZE);
expect(createBuffer.mock.calls[0]?.[0]?.size).toBe(32); });
it('updateUniforms writes amount, speed, time', () => { const device = createMockGPUDevice(); const writeBuffer = vi.spyOn(device.queue, 'writeBuffer'); const fx = new RollLine(); fx.amount = 0.15; fx.speed = 2; fx.time = 7.5;
fx.init(device, FORMAT, SIZE); fx.updateUniforms(16, SIZE);
const buf = writeBuffer.mock.calls[0]?.[2] as Float32Array; expect(buf[2]).toBeCloseTo(0.15); expect(buf[3]).toBeCloseTo(2); expect(buf[4]).toBeCloseTo(7.5); });});