web-dev-server.config.mjs

import { chromeLauncher } from "@web/test-runner";
import { esbuildPlugin } from "@web/dev-server-esbuild";

async function add_headers(ctx, next) {
    ctx.set("Cross-Origin-Opener-Policy", "same-origin");
    ctx.set("Cross-Origin-Embedder-Policy", "require-corp");
    await next(ctx);
}

export default {
    files: ["tests/**/*.test.ts"],
    plugins: [esbuildPlugin({ ts: true })],
    middlewares: [add_headers],
    browsers: [chromeLauncher({ launchOptions: { devtools: true } })],
    testsFinishTimeout: 10 * 60 * 1000,
};