vitest.config.ts

import { defineConfig } from "vitest/config";
import react from "@vitejs/plugin-react";
import { loadEnv } from "vite";
import path from "path";

export default defineConfig(({ mode }) => {
  // Load .env.local for tests
  const env = loadEnv(mode, process.cwd(), "");

  return {
    plugins: [react()],
    test: {
      globals: true,
      environment: "node",
      setupFiles: ["./src/test/setup.ts"],
      env: {
        ...env,
        // Pass through POSTGRES_URL if available (omit to let setup.ts fallback work)
        ...(env.POSTGRES_URL || process.env.POSTGRES_URL
          ? { POSTGRES_URL: env.POSTGRES_URL || process.env.POSTGRES_URL }
          : {}),
      },
      coverage: {
        provider: "v8",
        reporter: ["text", "json", "html", "lcov"],
        include: ["src/**/*.{ts,tsx}"],
        exclude: [
          "src/**/*.test.{ts,tsx}",
          "src/test/**",
          "src/app/**", // Server Components tested via E2E
          "src/components/ui/**", // shadcn/ui library components
          "**/*.d.ts",
          "**/types.ts",
          "**/*.config.{ts,js}",
        ],
        // No thresholds enforced in CI
      },
      // Project-based test suites
      projects: [
        {
          extends: true,
          test: {
            name: "unit",
            environment: "jsdom",
            include: ["src/**/*.test.ts", "src/**/*.test.tsx"],
            exclude: ["src/test/integration/**"],
          },
        },
        {
          extends: true,
          test: {
            name: "integration",
            include: [
              "src/test/integration/**/*.test.ts",
              "src/test/integration/**/*.test.tsx",
            ],
            exclude: ["src/test/integration/supabase/**"],
          },
        },
        {
          extends: true,
          test: {
            name: "integration-supabase",
            include: [
              "src/test/integration/supabase/**/*.test.ts",
              "src/test/integration/supabase/**/*.test.tsx",
            ],
          },
        },
      ],
    },
    resolve: {
      alias: {
        "~": path.resolve(__dirname, "./src"),
        // server-only is a Next.js convention that errors in client bundles.
        // In Vitest (Node.js), we resolve it to an empty module.
        "server-only": path.resolve(
          __dirname,
          "./src/test/mocks/server-only.ts"
        ),
      },
    },
  };
});