Add unit tests for extra fields in PerPartitionCursor and GlobalSubstreamCursor

Author: tolik0

unit_tests/sources/declarative/incremental/test_per_partition_cursor.py

@@ -8,6 +8,9 @@
 import pytest
 
 from airbyte_cdk.sources.declarative.incremental.declarative_cursor import DeclarativeCursor
+from airbyte_cdk.sources.declarative.incremental.global_substream_cursor import (
+    GlobalSubstreamCursor,
+)
 from airbyte_cdk.sources.declarative.incremental.per_partition_cursor import (
     PerPartitionCursor,
     PerPartitionKeySerializer,
@@ -715,3 +718,63 @@ def test_per_partition_state_when_set_initial_global_state(
         },
     ]
     assert cursor.get_stream_state()["states"] == expected_state
+
+
+def test_per_partition_cursor_partition_router_extra_fields(
+    mocked_cursor_factory, mocked_partition_router
+):
+    first_partition = {"first_partition_key": "first_partition_value"}
+    mocked_partition_router.stream_slices.return_value = [
+        StreamSlice(
+            partition=first_partition, cursor_slice={}, extra_fields={"extra_field": "extra_value"}
+        ),
+    ]
+    cursor = (
+        MockedCursorBuilder()
+        .with_stream_slices([{CURSOR_SLICE_FIELD: "first slice cursor value"}])
+        .build()
+    )
+
+    mocked_cursor_factory.create.return_value = cursor
+    cursor = PerPartitionCursor(mocked_cursor_factory, mocked_partition_router)
+
+    cursor.set_initial_state({"states": [{"partition": first_partition, "cursor": CURSOR_STATE}]})
+    slices = list(cursor.stream_slices())
+
+    assert slices[0].extra_fields == {"extra_field": "extra_value"}
+    assert slices == [
+        StreamSlice(
+            partition={"first_partition_key": "first_partition_value"},
+            cursor_slice={CURSOR_SLICE_FIELD: "first slice cursor value"},
+            extra_fields={"extra_field": "extra_value"},
+        )
+    ]
+
+
+def test_global_cursor_partition_router_extra_fields(
+    mocked_cursor_factory, mocked_partition_router
+):
+    first_partition = {"first_partition_key": "first_partition_value"}
+    mocked_partition_router.stream_slices.return_value = [
+        StreamSlice(
+            partition=first_partition, cursor_slice={}, extra_fields={"extra_field": "extra_value"}
+        ),
+    ]
+    cursor = (
+        MockedCursorBuilder()
+        .with_stream_slices([{CURSOR_SLICE_FIELD: "first slice cursor value"}])
+        .build()
+    )
+
+    global_cursor = GlobalSubstreamCursor(cursor, mocked_partition_router)
+
+    slices = list(global_cursor.stream_slices())
+
+    assert slices[0].extra_fields == {"extra_field": "extra_value"}
+    assert slices == [
+        StreamSlice(
+            partition=first_partition,
+            cursor_slice={CURSOR_SLICE_FIELD: "first slice cursor value"},
+            extra_fields={"extra_field": "extra_value"},
+        )
+    ]