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@ellemouton ellemouton commented Jul 14, 2025

Here we add a new unit tests for the graph SQL migration that uses the rapid library to test the migration against randomly generated nodes/channels/policies.

Part of #9795

@ellemouton ellemouton self-assigned this Jul 14, 2025
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Summary of Changes

Hello @ellemouton, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the testing suite for the graph SQL migration by introducing a property-based test. This new test uses the rapid library to generate random graph data, ensuring the migration process is robust and handles a wide array of valid and unexpected inputs, thereby increasing confidence in the migration's correctness.

Highlights

  • New Property-Based Test: I've added a new unit test, TestMigrateGraphToSQLRapid, which leverages the rapid library to perform property-based testing on the graph SQL migration. This test generates a wide variety of random nodes, channels, and policies, then verifies that the migration from the KV store to the SQL store preserves the graph state correctly.
  • Random Data Generation Helpers: New helper functions (genRandomNode, genRandomChannel, genRandomPolicy) have been introduced to facilitate the generation of diverse, randomly structured graph data (nodes, channels, and policies) for the property-based tests, ensuring comprehensive coverage of edge cases.
  • Standardized Test Database Setup: The test database setup functions across KV, Postgres, and SQLite backends (NewTestDB, NewTestDBFixture, NewTestDBWithFixture) have been refactored to provide a more consistent and flexible way to initialize test databases, especially when dealing with database fixtures for SQL-backed tests.
  • Improved Node Alias Generation: The RandNodeAlias function in lnwire/test_utils.go has been updated to use a defined character set for generating random node aliases, making the generation more robust and ensuring valid UTF-8 characters are used.
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Code Review

This pull request introduces a property-based test for the graph SQL migration using the rapid library, which is a valuable addition for ensuring the migration's correctness against a wide range of inputs. The changes also include refactoring test database setup to reuse fixtures, which is a good performance improvement for the test suite. I've identified a few areas for improvement, mainly concerning test determinism and a misleading comment. Overall, the changes are well-implemented and enhance the project's test coverage.

@ellemouton ellemouton force-pushed the graphMigUnitTestsRapid branch from ae06927 to e0416d8 Compare July 15, 2025 05:09
@ellemouton ellemouton requested review from bhandras and guggero July 15, 2025 09:06
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Very nice, LGTM 🎉

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Awesome! LGTM !!

In preparation for tests where we will want to spin up SQL DBs many
times, we do some refactoring so that it is easy to re-use postgres
fixtures since those are expensive to spin up.
To ensure that the RandNodeAlias helper can be used elsewhere to
generate random aliases, we adjust it in this test to only produce valid
UTF-8 strings as required by the spec.
@ellemouton ellemouton force-pushed the graphMigUnitTestsRapid branch from e0416d8 to d7b8259 Compare July 15, 2025 16:17
@guggero guggero merged commit e72e414 into lightningnetwork:master Jul 15, 2025
38 of 39 checks passed
@ellemouton ellemouton deleted the graphMigUnitTestsRapid branch July 16, 2025 04:05
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3 participants