CDK: test catalog helpers (#3271)

* test catalog helpers

* Format.

Co-authored-by: Davin Chia <davinchia@gmail.com>

airbyte-cdk/python/unit_tests/base_python/test_catalog_helpers.py

@@ -0,0 +1,48 @@
+# MIT License
+#
+# Copyright (c) 2020 Airbyte
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+
+from airbyte_cdk import AirbyteCatalog, AirbyteStream, SyncMode
+from airbyte_cdk.base_python import CatalogHelper
+
+
+def test_coerce_catalog_as_full_refresh():
+    incremental = AirbyteStream(
+        name="1",
+        json_schema={"k": "v"},
+        supported_sync_modes=[SyncMode.incremental, SyncMode.full_refresh],
+        source_defined_cursor=True,
+        default_cursor_field=["cursor"],
+    )
+    full_refresh = AirbyteStream(
+        name="2", json_schema={"k": "v"}, supported_sync_modes=[SyncMode.full_refresh], source_defined_cursor=False
+    )
+    input = AirbyteCatalog(streams=[incremental, full_refresh])
+
+    expected = AirbyteCatalog(
+        streams=[
+            AirbyteStream(name="1", json_schema={"k": "v"}, supported_sync_modes=[SyncMode.full_refresh], source_defined_cursor=False),
+            full_refresh,
+        ]
+    )
+
+    assert expected == CatalogHelper.coerce_catalog_as_full_refresh(input)