Add e2e test for deletion with pg log-based replication

Currently, deleting a record when using Postgres with log-based replication
will overwrite all non-PK and non-metadata columns in Snowflake with `null`.

This is an integration test for the fix in
transferwise/pipelinewise-target-snowflake#276

setup.py

@@ -46,6 +46,7 @@
       extras_require={
           'test': [
               'pre-commit==2.18.1',
+              'python-dateutil==2.8.2',
               'flake8==4.0.1',
               'pytest==7.1.1',
               'pytest-dependency==0.4.0',

tests/end_to_end/target_snowflake/tap_postgres/test_replicate_pg_to_sf_without_delete_in_target.py

@@ -0,0 +1,61 @@
+from datetime import datetime
+import dateutil.parser
+
+from pipelinewise.fastsync import postgres_to_snowflake
+from tests.end_to_end.helpers import assertions
+from tests.end_to_end.target_snowflake.tap_postgres import TapPostgres
+
+TAP_ID = 'postgres_to_sf_without_delete_in_target'
+TARGET_ID = 'snowflake'
+
+
+class TestReplicatePGToSFWithoutDeleteInTarget(TapPostgres):
+    """
+    Resync tables from Postgres to Snowflake without replicating deletes
+    """
+
+    # pylint: disable=arguments-differ
+    def setUp(self):
+        super().setUp(tap_id=TAP_ID, target_id=TARGET_ID)
+
+    def test_replicate_pg_to_sf_without_delete_in_target(self):
+        assertions.assert_run_tap_success(
+            self.tap_id, self.target_id, ['fastsync', 'singer']
+        )
+
+        result = self.e2e_env.run_query_target_snowflake(
+            f'SELECT _SDC_DELETED_AT FROM '
+            f'ppw_e2e_tap_postgres{self.e2e_env.sf_schema_postfix}."TABLE_WITH_SPACE AND UPPERCASE"'
+            f" where cvarchar='A';"
+        )[0][0]
+
+        self.assertIsNone(result)
+
+        # Delete row in source
+        self.e2e_env.run_query_tap_postgres(
+            'DELETE FROM public."table_with_space and UPPERCase" WHERE cvarchar = \'A\';'
+        )
+
+        # Run tap second time
+        assertions.assert_run_tap_success(
+            self.tap_id, self.target_id, ['singer'], profiling=True
+        )
+
+        deleted_row = self.e2e_env.run_query_target_snowflake(
+            f'SELECT _SDC_DELETED_AT FROM '
+            f'ppw_e2e_tap_postgres{self.e2e_env.sf_schema_postfix}."TABLE_WITH_SPACE AND UPPERCASE"'
+            f" where cvarchar='A';"
+        )[0]
+
+        # Validate that the entire row data is still in the target
+        for column in deleted_row:
+            self.assertIsNotNone(column)
+
+        deleted_at = self.e2e_env.run_query_target_snowflake(
+            f'SELECT _SDC_DELETED_AT FROM '
+            f'ppw_e2e_tap_postgres{self.e2e_env.sf_schema_postfix}."TABLE_WITH_SPACE AND UPPERCASE"'
+            f" where cvarchar='A';"
+        )[0][0]
+
+        # Validate that _sdc_deleted_at column exists and has been set
+        self.assertIsNotNone(deleted_at)

tests/end_to_end/test-project/tap_postgres_to_sf_without_delete_in_target.yml.template

@@ -0,0 +1,47 @@
+---
+
+# ------------------------------------------------------------------------------
+# General Properties
+# ------------------------------------------------------------------------------
+id: "postgres_to_sf_without_delete_in_target"
+name: "PostgreSQL source test database"
+type: "tap-postgres"
+owner: "test-runner"
+
+
+# ------------------------------------------------------------------------------
+# Source (Tap) - PostgreSQL connection details
+# ------------------------------------------------------------------------------
+db_conn:
+  host: "${TAP_POSTGRES_HOST}"          # PostgreSQL host
+  logical_poll_total_seconds: 30        # Time out if no LOG_BASED changes received for 3 seconds
+  port: ${TAP_POSTGRES_PORT}            # PostgreSQL port
+  user: "${TAP_POSTGRES_USER}"          # PostgreSQL user
+  password: "${TAP_POSTGRES_PASSWORD}"  # Plain string or vault encrypted
+  dbname: "${TAP_POSTGRES_DB}"          # PostgreSQL database name
+
+hard_delete: false
+add_metadata_columns: true
+
+# ------------------------------------------------------------------------------
+# Destination (Target) - Target properties
+# Connection details should be in the relevant target YAML file
+# ------------------------------------------------------------------------------
+target: "snowflake"                    # ID of the target connector where the data will be loaded
+batch_size_rows: 1000                  # Batch size for the stream to optimise load performance
+stream_buffer_size: 0                  # In-memory buffer size (MB) between taps and targets for asynchronous data pipes
+
+
+# ------------------------------------------------------------------------------
+# Source to target Schema mapping
+# ------------------------------------------------------------------------------
+schemas:
+
+  ### SOURCE SCHEMA 1: public
+  - source_schema: "public"
+    target_schema: "ppw_e2e_tap_postgres${TARGET_SNOWFLAKE_SCHEMA_POSTFIX}"
+
+    tables:
+      ### Table with space and mixed upper and lowercase characters
+      - table_name: "table_with_space and UPPERCase"
+        replication_method: "LOG_BASED"