feat: move to lazy widget import

tests/unit_tests/test_generate_cli_client.py

@@ -5,7 +5,8 @@ import black
 import isort
 import pytest
 
-from bec_widgets.utils.generate_cli import ClientGenerator
+from bec_widgets.utils.generate_cli import ClientGenerator, write_designer_plugins
+from bec_widgets.utils.generate_designer_plugin import DesignerPluginInfo
 from bec_widgets.utils.plugin_utils import BECClassContainer, BECClassInfo
 
 # pylint: disable=missing-function-docstring
@@ -59,6 +60,10 @@ class MockViewWithContent:
         """Activate view."""
 
 
+class MockDesignerWidget:
+    pass
+
+
 def test_client_generator_with_black_formatting():
     generator = ClientGenerator(base=True)
     container = BECClassContainer()
@@ -285,3 +290,17 @@ c = a + b"""
         content = file.read()
 
     assert corrected in content
+
+
+def test_write_designer_plugins(tmp_path):
+    file_name = tmp_path / "designer_plugins.py"
+
+    write_designer_plugins([DesignerPluginInfo(MockDesignerWidget)], str(file_name))
+
+    with open(file_name, "r", encoding="utf-8") as file:
+        content = file.read()
+
+    assert '"MockDesignerWidget":' in content
+    assert '"tests.unit_tests.test_generate_cli_client"' in content
+    assert '"MockDesignerWidget"' in content
+    assert "MockDesignerWidgetPlugin" not in content