feat: imported from @tanstack/router base vite-plugin logic

packages/vite-fs-router/tests/index.test.ts

@@ -0,0 +1,34 @@
+import { readFile, readdir } from 'fs/promises'
+import path from 'path'
+import { expect, test } from 'vitest'
+import { makeCompile, splitFile } from '../src/compiler'
+import { SPLIT_PREFIX } from '../src/constants'
+
+async function splitTestFile(opts: { file: string }): void {
+  const code = (
+    await readFile(path.resolve(__dirname, `./test-files/${opts.file}`))
+  ).toString()
+
+  const filename = opts.file.replace(__dirname, '')
+
+  const result = await splitFile({
+    code,
+    compile: makeCompile({
+      root: './test-files',
+    }),
+    filename: `${filename}?${SPLIT_PREFIX}`,
+  })
+
+  await expect(result.code).toMatchFileSnapshot(
+    `./snapshots/${filename.replace('.tsx', '')}?split.tsx`,
+  )
+}
+
+test('it compiles and splits', async (): Promise<void> => {
+  // get the list of files from the /test-files directory
+  const files = await readdir(path.resolve(__dirname, './test-files'))
+  for (const file of files) {
+    console.log('Testing:', file)
+    await splitTestFile({ file })
+  }
+})