feature: add server error integration test (#146)

packages/test-integration/test/PreviewProcessInternalServerError.test.ts

@@ -0,0 +1,23 @@
+import { expect, test } from '@jest/globals'
+import getPort from 'get-port'
+import { createPreviewProcess } from '../src/parts/CreatePreviewProcess/CreatePreviewProcess.js'
+import { get } from '../src/parts/Get/Get.js'
+import { getRoot } from '../src/parts/GetRoot/GetRoot.js'
+
+test.skip('preview process - internal server error', async () => {
+  const previewProcess = createPreviewProcess()
+  const id = 1
+  const port = await getPort()
+  const root = getRoot()
+
+  await previewProcess.invoke('WebViewServer.create', id)
+  await previewProcess.invoke('WebViewServer.setHandler', id, '', root, '', '')
+  await previewProcess.invoke('WebViewServer.start', id, port)
+
+  // Using a special path that triggers internal server error in the preview process
+  const response = await get(`http://localhost:${port}/__internal_error__`)
+  expect(response.status).toBe(500)
+  expect(await response.text()).toBe('500 - Internal Server Error')
+
+  previewProcess[Symbol.dispose]()
+})