runtimequestion 394 Software Architecture · easy
Integration tests for the ratings report
write_report(in_path, out_path) reads a ratings CSV, averages each product's ratings and writes product_id,average lines. Write integration tests (test_… functions with assert) that run it on files in a temporary folder. They must pass for the real function and fail for three versions with wiring bugs.
Target
write_report(in_path, out_path): input product_id,rating with a header; output one product_id,average line per product, sorted by ID, averages rounded to 2 decimals; returns the number of productsDefects to catchthe header read as data; averages not rounded; products in input order instead of sorted