Add partition key hash baseline tests for Cosmos DB Python SDK #45136
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Validates MurmurHash3 V1/V2 partition key hashing against baseline XML data covering singletons (undefined, null, true, false), numbers (zero, negative zero, epsilon, NaN, infinity, int64 extremes), strings (empty through 2KB), and hierarchical partition key lists. Uses the production code path (PartitionKey._write_for_hashing / _write_for_hashing_v2) including string suffix bytes. Baselines can be regenerated with UPDATE_BASELINE=1.
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I built this as part of developing Azure/azure-sdk-for-go#26007 and thought it would be really good if our various SDKs had one set of common tests for computing EPKs. The .NET SDK has baseline tests like this, and this is a slight iteration on those (which I plan to roll in to other SDKs too). |
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Summary
Adds baseline tests validating MurmurHash3 V1/V2 partition key hashing against known-good values.
Test coverage (58 tests)
Design
PartitionKey._write_for_hashing/_write_for_hashing_v2) including string suffix bytes, so tests validate the actual SDK behavior end-to-end.UPDATE_BASELINE=1 pytest tests/test_partition_key_hash_baseline.py.PartitionKeyHashBaselineTest, with expected hash values regenerated from the Python SDK's production serialization path.