arbret/frontend/e2e/helpers/setup.ts

import { test } from "@playwright/test";
import { resetDatabase } from "./reset-db";

/**
 * Set language to English for e2e tests.
 * E2E tests should only test in English according to requirements.
 * This is applied globally via test.beforeEach in the setup file.
 *
 * Also sets NEXT_PUBLIC_API_URL based on worker index so each worker
 * connects to its own backend instance, and resets the database before
 * each test for isolation.
 */
test.beforeEach(async ({ context, request }, testInfo) => {
  // Set API URL based on worker index
  // Each worker gets its own backend (port 8001 + workerIndex)
  const workerIndex = testInfo.workerIndex;
  const basePort = parseInt(process.env.E2E_PORT_START || "8001", 10);
  const backendPort = basePort + workerIndex;
  const backendUrl = `http://localhost:${backendPort}`;

  // Set environment variable for this test run
  process.env.NEXT_PUBLIC_API_URL = backendUrl;

  // Reset database before each test for isolation
  // This must complete successfully before tests run to avoid race conditions
  await resetDatabase(request);

  // Small delay to ensure database transaction commits are visible
  // This prevents race conditions where tests start before reset completes
  await new Promise((resolve) => setTimeout(resolve, 100));

  // Add init script to set English language before any page loads
  // This must be called before any page.goto() calls
  await context.addInitScript(() => {
    if (typeof window !== "undefined") {
      window.localStorage.setItem("arbret-locale", "en");
    }
  });
});