extract-test-set_skill

Overview

This skill extracts a raw price dataframe for an isolated unit test from an uncleaned price database and generates a runnable pytest module plus a matching Parquet file. It automates slicing price data for a single vault (chain id and address) and embeds metadata into the generated test. The result is a reproducible, self-contained test that validates downstream logic against historical prices.

How this skill works

Provide a chain id and contract address (as a chain-explorer link) plus a test case name. The script reads DEFAULT_UNCLEANED_PRICE_DATABASE, filters the time series for the specified vault, writes a compact Parquet file containing only price data, and emits a test_xxx.py file with one test function and inline metadata pointing to the Parquet. Run pytest on the generated module to execute the isolated test.

When to use it

• Creating deterministic unit tests that depend on historical price series for a single vault.
• Isolating a failing integration test into a small, reproducible example.
• Capturing a snapshot of raw prices for regression testing after data wrangling changes.
• Sharing minimal test data with collaborators or CI without shipping the entire database.

Best practices

• Limit each generated test to a single test function to keep failures focused and easy to debug.
• Include chain id and an explorer link in the test metadata so the vault source is clear.
• Store only the price columns needed by the logic under test to minimize file size and noise.
• Version-control the generated test and Parquet together so test inputs stay synchronized.
• Run pytest immediately after generation to confirm the test and Parquet are correct.

Example use cases

• Extract prices for a PancakeSwap vault on BSC to isolate a price-normalization bug.
• Generate a regression test after changing a price-wrangling transform to ensure no drift.
• Produce a compact dataset to run in CI where the full price database is unavailable.
• Create a reproducible failing test to share with a teammate when debugging DeFi integration.