Add tests for optimistic concurrency

tests/integration/test_writes/test_optimistic_concurrency.py

@@ -0,0 +1,89 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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 pyarrow as pa
+import pytest
+from pyspark.sql import SparkSession
+
+from pyiceberg.catalog import Catalog
+from pyiceberg.exceptions import CommitFailedException
+from utils import _create_table
+
+
+@pytest.mark.integration
+@pytest.mark.parametrize("format_version", [1, 2])
+def test_conflict_delete_delete(
+    spark: SparkSession, session_catalog: Catalog, arrow_table_with_null: pa.Table, format_version: int
+) -> None:
+    identifier = "default.test_conflict"
+    tbl1 = _create_table(session_catalog, identifier, {"format-version": format_version}, [arrow_table_with_null])
+    tbl2 = session_catalog.load_table(identifier)
+
+    tbl1.delete("string == 'z'")
+
+    with pytest.raises(CommitFailedException, match="(branch main has changed: expected id ).*"):
+        # tbl2 isn't aware of the commit by tbl1
+        tbl2.delete("string == 'z'")
+
+
+@pytest.mark.integration
+@pytest.mark.parametrize("format_version", [1, 2])
+def test_conflict_delete_append(
+    spark: SparkSession, session_catalog: Catalog, arrow_table_with_null: pa.Table, format_version: int
+) -> None:
+    identifier = "default.test_conflict"
+    tbl1 = _create_table(session_catalog, identifier, {"format-version": format_version}, [arrow_table_with_null])
+    tbl2 = session_catalog.load_table(identifier)
+
+    # This is allowed
+    tbl1.delete("string == 'z'")
+
+    with pytest.raises(CommitFailedException, match="(branch main has changed: expected id ).*"):
+        # tbl2 isn't aware of the commit by tbl1
+        tbl2.append(arrow_table_with_null)
+
+
+@pytest.mark.integration
+@pytest.mark.parametrize("format_version", [1, 2])
+def test_conflict_append_delete(
+    spark: SparkSession, session_catalog: Catalog, arrow_table_with_null: pa.Table, format_version: int
+) -> None:
+    identifier = "default.test_conflict"
+    tbl1 = _create_table(session_catalog, identifier, {"format-version": format_version}, [arrow_table_with_null])
+    tbl2 = session_catalog.load_table(identifier)
+
+    tbl1.append(arrow_table_with_null)
+
+    with pytest.raises(CommitFailedException, match="(branch main has changed: expected id ).*"):
+        # tbl2 isn't aware of the commit by tbl1
+        tbl2.delete("string == 'z'")
+
+
+@pytest.mark.integration
+@pytest.mark.parametrize("format_version", [1, 2])
+def test_conflict_append_append(
+    spark: SparkSession, session_catalog: Catalog, arrow_table_with_null: pa.Table, format_version: int
+) -> None:
+    identifier = "default.test_conflict"
+    tbl1 = _create_table(session_catalog, identifier, {"format-version": format_version}, [arrow_table_with_null])
+    tbl2 = session_catalog.load_table(identifier)
+
+    tbl1.append(arrow_table_with_null)
+
+    with pytest.raises(CommitFailedException, match="(branch main has changed: expected id ).*"):
+        # tbl2 isn't aware of the commit by tbl1
+        tbl2.append(arrow_table_with_null)