test: solara needs to recreate the import map widget

README.md

@@ -261,7 +261,7 @@ And it also means we can copy paste _most_ of the examples from [mui](https://mu
 
 ```tsx
 %%react -n my_widget -d
-import Button from "@mui/material/Button";
+import {Button} from "@mui/material";
 import confetti from "canvas-confetti";
 import * as React from "react";
 

ipyreact/basic.tsx

@@ -1,4 +1,4 @@
-import Button from "@mui/material/Button";
+import { Button } from "@mui/material";
 import confetti from "canvas-confetti";
 
 import * as React from "react";

ipyreact/cellmagic.py

@@ -44,7 +44,7 @@ def react(self, line, cell, local_ns):
 
         Example:
             %%react -n my_widget -d
-            import Button from '@mui/material/Button';
+            import {Button} from '@mui/material';
             import confetti from "canvas-confetti";
             import * as React from "react";
 

tests/ui/library_test.py

@@ -1,10 +1,8 @@
 import playwright.sync_api
 from IPython.display import display
 
-import ipyreact
-
 code = """
-import Button from '@mui/material/Button';
+import {Button} from '@mui/material';
 import * as React from "react";
 
 export default function({value, setValue, debug}) {
@@ -16,6 +14,12 @@
 
 
 def test_material_ui(solara_test, assert_solara_snapshot, page_session: playwright.sync_api.Page):
+    # this can be removed if solara adds support to ipyreact/ipyesm
+    import ipyreact.importmap
+
+    ipyreact.importmap._import_map_widget = None
+    ipyreact.importmap._update_import_map()
+
     class Button(ipyreact.ReactWidget):
         _esm = code