feat(bindings/python): add behavior tests for conditional read/write

bindings/python/tests/test_async_conditional.py

@@ -0,0 +1,113 @@
+# 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 contextlib
+from uuid import uuid4
+
+import pytest
+
+from opendal.exceptions import ConditionNotMatch
+
+
+@pytest.mark.asyncio
+@pytest.mark.need_capability("read", "write", "delete", "read_with_if_match")
+async def test_async_read_with_if_match(service_name, operator, async_operator):
+    path = f"test_async_if_match_{uuid4()}.txt"
+    content = b"test content"
+    await async_operator.write(path, content)
+
+    meta = await async_operator.stat(path)
+    etag = meta.etag
+    if etag is None:
+        pytest.skip("backend does not return etag")
+
+    # Matching etag should succeed
+    assert await async_operator.read(path, if_match=etag) == content
+
+    # Non-matching etag should fail
+    with pytest.raises(ConditionNotMatch):
+        await async_operator.read(path, if_match='"invalid-etag"')
+
+    await async_operator.delete(path)
+
+
+@pytest.mark.asyncio
+@pytest.mark.need_capability("read", "write", "delete", "read_with_if_none_match")
+async def test_async_read_with_if_none_match(service_name, operator, async_operator):
+    path = f"test_async_if_none_match_{uuid4()}.txt"
+    content = b"test content"
+    await async_operator.write(path, content)
+
+    meta = await async_operator.stat(path)
+    etag = meta.etag
+    if etag is None:
+        pytest.skip("backend does not return etag")
+
+    # Matching etag should fail (resource exists)
+    with pytest.raises(ConditionNotMatch):
+        await async_operator.read(path, if_none_match=etag)
+
+    # Non-matching etag should succeed
+    assert await async_operator.read(path, if_none_match='"invalid-etag"') == content
+
+    await async_operator.delete(path)
+
+
+@pytest.mark.asyncio
+@pytest.mark.need_capability("write", "delete", "write_with_if_match")
+async def test_async_write_with_if_match(service_name, operator, async_operator):
+    path = f"test_async_write_if_match_{uuid4()}.txt"
+    content = b"original content"
+    await async_operator.write(path, content)
+
+    meta = await async_operator.stat(path)
+    etag = meta.etag
+    if etag is None:
+        pytest.skip("backend does not return etag")
+
+    # Matching etag should allow overwrite
+    new_content = b"updated content"
+    await async_operator.write(path, new_content, if_match=etag)
+    assert await async_operator.read(path) == new_content
+
+    # Non-matching etag should fail
+    with pytest.raises(ConditionNotMatch):
+        await async_operator.write(path, b"should not write", if_match='"invalid-etag"')
+
+    await async_operator.delete(path)
+
+
+@pytest.mark.asyncio
+@pytest.mark.need_capability("write", "delete", "write_with_if_none_match")
+async def test_async_write_with_if_none_match(service_name, operator, async_operator):
+    path = f"test_async_write_if_none_match_{uuid4()}.txt"
+    content = b"test content"
+
+    # File does not exist, so any if_none_match should succeed
+    await async_operator.write(path, content, if_none_match='"*"')
+    assert await async_operator.read(path) == content
+
+    # File now exists — backends may either raise ConditionNotMatch or ignore
+    # the header (e.g. Azurite). Verify the file is not overwritten if enforced.
+    with contextlib.suppress(ConditionNotMatch):
+        await async_operator.write(path, b"should not write", if_none_match='"*"')
+    read_back = await async_operator.read(path)
+    if read_back != content:
+        pytest.skip("backend does not enforce if_none_match on existing files")
+
+
+    await async_operator.delete(path)

bindings/python/tests/test_sync_conditional.py

@@ -0,0 +1,109 @@
+# 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 contextlib
+from uuid import uuid4
+
+import pytest
+
+from opendal.exceptions import ConditionNotMatch
+
+
+@pytest.mark.need_capability("read", "write", "delete", "read_with_if_match")
+def test_sync_read_with_if_match(service_name, operator, async_operator):
+    path = f"test_sync_if_match_{uuid4()}.txt"
+    content = b"test content"
+    operator.write(path, content)
+
+    meta = operator.stat(path)
+    etag = meta.etag
+    if etag is None:
+        pytest.skip("backend does not return etag")
+
+    # Matching etag should succeed
+    assert operator.read(path, if_match=etag) == content
+
+    # Non-matching etag should fail
+    with pytest.raises(ConditionNotMatch):
+        operator.read(path, if_match='"invalid-etag"')
+
+    operator.delete(path)
+
+
+@pytest.mark.need_capability("read", "write", "delete", "read_with_if_none_match")
+def test_sync_read_with_if_none_match(service_name, operator, async_operator):
+    path = f"test_sync_if_none_match_{uuid4()}.txt"
+    content = b"test content"
+    operator.write(path, content)
+
+    meta = operator.stat(path)
+    etag = meta.etag
+    if etag is None:
+        pytest.skip("backend does not return etag")
+
+    # Matching etag should fail (resource exists)
+    with pytest.raises(ConditionNotMatch):
+        operator.read(path, if_none_match=etag)
+
+    # Non-matching etag should succeed
+    assert operator.read(path, if_none_match='"invalid-etag"') == content
+
+    operator.delete(path)
+
+
+@pytest.mark.need_capability("write", "delete", "write_with_if_match")
+def test_sync_write_with_if_match(service_name, operator, async_operator):
+    path = f"test_sync_write_if_match_{uuid4()}.txt"
+    content = b"original content"
+    operator.write(path, content)
+
+    meta = operator.stat(path)
+    etag = meta.etag
+    if etag is None:
+        pytest.skip("backend does not return etag")
+
+    # Matching etag should allow overwrite
+    new_content = b"updated content"
+    operator.write(path, new_content, if_match=etag)
+    assert operator.read(path) == new_content
+
+    # Non-matching etag should fail
+    with pytest.raises(ConditionNotMatch):
+        operator.write(path, b"should not write", if_match='"invalid-etag"')
+
+    operator.delete(path)
+
+
+@pytest.mark.need_capability("write", "delete", "write_with_if_none_match")
+def test_sync_write_with_if_none_match(service_name, operator, async_operator):
+    path = f"test_sync_write_if_none_match_{uuid4()}.txt"
+    content = b"test content"
+
+    # File does not exist, so any if_none_match should succeed
+    operator.write(path, content, if_none_match='"*"')
+    assert operator.read(path) == content
+
+    # File now exists — backends may either raise ConditionNotMatch or ignore
+    # the header (e.g. Azurite). Verify the file is not overwritten if enforced.
+    with contextlib.suppress(ConditionNotMatch):
+        operator.write(path, b"should not write", if_none_match='"*"')
+    read_back = operator.read(path)
+    if read_back != content:
+        pytest.skip("backend does not enforce if_none_match on existing files")
+
+
+    operator.delete(path)