vitest.config.ts

import { defineConfig } from 'vitest/config';

const shared = {
  environment: 'jsdom' as const,
  globals: false,
  setupFiles: ['./test/setup.ts'],
};

export default defineConfig({
  test: {
    coverage: {
      provider: 'v8',
      include: ['src/**/*.{ts,tsx}'],
      // Only these two index files are pure re-export barrels. Adapter entry
      // files contain implementation and must remain visible in coverage.
      exclude: ['src/index.ts', 'src/core/index.ts', '**/*.d.ts'],
    },
    projects: [
      {
        // Everything except the Solid adapter test — the existing esbuild
        // pipeline (React automatic JSX) is untouched.
        test: {
          ...shared,
          name: 'node',
          include: ['test/**/*.test.{ts,tsx}'],
          exclude: [
            'test/tanstack-solid-router.test.ts',
            'test/solid-router.test.ts',
            'test/browser/**',
          ],
        },
      },
      {
        // The Solid tests are JSX-free and import the *precompiled* builds:
        // `@tanstack/solid-router`/`@solidjs/router`'s `import` condition and
        // `solid-js`'s `browser` condition both ship ready-to-run solid-js/web
        // calls, so no Solid compiler is needed — only these resolve conditions.
        // Inlining the packages routes them through Vite's transform so the
        // conditions apply (externalized deps would resolve via Node's `node`
        // condition → the server build). Scoped to this project, so the
        // React/Vue suites are untouched.
        resolve: {
          conditions: ['browser', 'development', 'module', 'node', 'import', 'default'],
        },
        test: {
          ...shared,
          name: 'solid',
          include: ['test/tanstack-solid-router.test.ts', 'test/solid-router.test.ts'],
          server: {
            deps: { inline: [/solid-js/, /@tanstack\/solid-router/, /@solidjs\/router/] },
          },
        },
      },
    ],
  },
});