Business Logic Checklist for OrderProcessingService

This document outlines the key business logic scenarios tested in OrderProcessingServiceTest.

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Checklist

General Order Processing

• Ensure orders are fetched for the given user ID.
• Process each order based on its type (A, B, C, or unknown).
• Return false immediately if any order fails to export (export_failed status).
• Update the database safely for each order.
• Handle exceptions gracefully and return false if any error occurs.

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Type A Orders

• Export orders to a CSV file.
• Set status to exported if the file is created successfully.
• Set status to export_failed if the file creation fails.
• Add a note for high-value orders (amount > 150).
• Skip database updates for orders with export_failed status.

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Type B Orders

• Call an external API for processing.
• Set status to:
  • processed if apiData >= 50 and amount < 100.
  • pending if apiData < 50 or the flag is true.
  • error if none of the conditions are met.
• Handle API errors gracefully by setting status to api_failure.
• Skip database updates for orders with api_failure status.

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Type C Orders

• Set status to:
  • completed if the flag is true.
  • in_progress if the flag is false.
• Ensure database updates are performed for valid statuses.

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Unknown Order Types

• Set status to unknown_type for unsupported order types.
• Ensure database updates are performed for unknown_type orders.

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Database Updates

• Update the database with the order's status and priority.
• Skip database updates for orders with export_failed or api_failure statuses.
• Handle database exceptions gracefully by setting status to db_error.

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Edge Cases

• Handle empty orders gracefully by returning an empty array.
• Ensure the method returns false if any exception occurs during processing.
• Ensure priority is set to high for orders with amount > 200 and low otherwise.
• Ensure all orders are processed even if some fail.

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Notes

• This checklist is based on the test cases implemented in OrderProcessingServiceTest.
• Ensure all scenarios are covered when modifying or extending the OrderProcessingService.
• Regularly update this checklist to reflect changes in business logic or new requirements.