Uploaded Test files

venv/Lib/site-packages/ipywidgets/widgets/tests/test_send_state.py

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+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+from traitlets import Bool, Tuple, List
+
+from .utils import setup, teardown
+
+from ..widget import Widget
+
+# A widget with simple traits
+class SimpleWidget(Widget):
+    a = Bool().tag(sync=True)
+    b = Tuple(Bool(), Bool(), Bool(), default_value=(False, False, False)).tag(sync=True)
+    c = List(Bool()).tag(sync=True)
+
+def test_empty_send_state():
+    w = SimpleWidget()
+    w.send_state([])
+    assert w.comm.messages == []
+
+def test_empty_hold_sync():
+    w = SimpleWidget()
+    with w.hold_sync():
+        pass
+    assert w.comm.messages == []