Chore: homepage tests (#6278)

vitest.config.mjs

@@ -0,0 +1,54 @@
+import { fileURLToPath, URL } from "node:url";
+
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  // Next.js handles JSX via SWC; Vitest uses Vite/esbuild, so enable the modern JSX runtime
+  // to avoid requiring `import React from "react"` in every JSX file.
+  esbuild: {
+    jsx: "automatic",
+  },
+  resolve: {
+    alias: {
+      components: fileURLToPath(new URL("./src/components", import.meta.url)),
+      pages: fileURLToPath(new URL("./src/pages", import.meta.url)),
+      styles: fileURLToPath(new URL("./src/styles", import.meta.url)),
+      "test-utils": fileURLToPath(new URL("./src/test-utils", import.meta.url)),
+      utils: fileURLToPath(new URL("./src/utils", import.meta.url)),
+      widgets: fileURLToPath(new URL("./src/widgets", import.meta.url)),
+    },
+  },
+  test: {
+    environment: "node",
+    // Use worker threads instead of forked processes to reduce overhead and avoid noisy per-process Node warnings.
+    pool: "threads",
+    setupFiles: ["./vitest.setup.js"],
+    include: ["src/**/*.test.{js,jsx}", "src/**/*.spec.{js,jsx}"],
+    coverage: {
+      provider: "v8",
+      all: true,
+      reporter: ["text", "lcov", "json-summary"],
+      include: ["src/**/*.{js,jsx,ts,tsx}"],
+      exclude: [
+        // Ignore build artifacts / generated reports
+        ".next/**",
+        "coverage/**",
+        // Exclude tests and test harness code from coverage totals.
+        "src/**/*.test.{js,jsx,ts,tsx}",
+        "src/**/*.spec.{js,jsx,ts,tsx}",
+        "src/**/__tests__/**",
+        "src/test-utils/**",
+        "src/widgets/widgets.js",
+        "src/widgets/components.js",
+        "src/skeleton/custom.js",
+        "next-i18next.config.js",
+        "next.config.js",
+        "postcss.config.js",
+        "tailwind.config.js",
+        "eslint.config.mjs",
+        "vitest.config.mjs",
+        ".prettierrc.js",
+      ],
+    },
+  },
+});