add missing file

Author: NoureldinYosri

test/cirq_compatibility.py

@@ -0,0 +1,43 @@
+# Copyright 2025 The TUnits Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import pytest
+import tunits as tu
+import cirq
+
+
+@pytest.mark.cirq
+def test_to_json() -> None:
+    assert (
+        cirq.to_json(tu.ns * 3)
+        == """{
+  "cirq_type": "tunits.Value",
+  "value": 3,
+  "unit": "ns"
+}"""
+    )
+
+    assert (
+        cirq.to_json(tu.GHz * [1, 2, 3, -1])
+        == """{
+  "cirq_type": "tunits.ValueArray",
+  "value": [
+    1.0,
+    2.0,
+    3.0,
+    -1.0
+  ],
+  "unit": "GHz"
+}"""
+    )