feat: implement SensorReference.to_json()

raillabel/format/sensor_reference.py

@@ -6,7 +6,7 @@
 from dataclasses import dataclass
 from decimal import Decimal
 
-from raillabel.json_format import JSONStreamSync
+from raillabel.json_format import JSONStreamSync, JSONStreamSyncProperties, JSONStreamSyncTimestamp
 
 
 @dataclass
@@ -27,3 +27,12 @@ def from_json(cls, json: JSONStreamSync) -> SensorReference:
             timestamp=Decimal(json.stream_properties.sync.timestamp),
             uri=json.uri,
         )
+
+    def to_json(self) -> JSONStreamSync:
+        """Export this object into the RailLabel JSON format."""
+        return JSONStreamSync(
+            stream_properties=JSONStreamSyncProperties(
+                sync=JSONStreamSyncTimestamp(timestamp=str(self.timestamp)),
+            ),
+            uri=self.uri,
+        )

tests/test_raillabel/format/test_sensor_reference.py

@@ -50,10 +50,20 @@ def test_from_json(sensor_reference, sensor_reference_json):
     assert actual == sensor_reference
 
 
-def test_from_json(another_sensor_reference, another_sensor_reference_json):
+def test_from_json__another(another_sensor_reference, another_sensor_reference_json):
     actual = SensorReference.from_json(another_sensor_reference_json)
     assert actual == another_sensor_reference
 
 
+def test_to_json(sensor_reference, sensor_reference_json):
+    actual = sensor_reference.to_json()
+    assert actual == sensor_reference_json
+
+
+def test_to_json__another(another_sensor_reference, another_sensor_reference_json):
+    actual = another_sensor_reference.to_json()
+    assert actual == another_sensor_reference_json
+
+
 if __name__ == "__main__":
     pytest.main([__file__, "-v"])