Refactoring Legacy for Tests | Dataford Interview Questions

How would you refactor this specific block of legacy code to make it more testable and maintainable?

Given a Python source string, return the single best refactoring recommendation. Focus on separating pure logic from side effects, extracting small testable functions, or injecting dependencies when needed.

Function

def refactor_legacy_code(source_code):

Input

source_code: a Python source string containing a small legacy function.

Output

A short string describing the most appropriate refactor.

Constraints

1 <= len(source_code) <= 500
source_code is a valid Python function snippet
Return exactly one concise recommendation string

Function Signature

def refactor_legacy_code(source_code):

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Problem