Lesson 16 / 25

Refactoring safely

Apply Refactoring safely with clear evidence.

Understand Refactoring safely

For Refactoring safely, begin with the problem it solves. Identify the inputs, constraints, and observable outcome before choosing an implementation.

See the workflow

Use this path while practising Refactoring safely: understand, act, verify, and improve.

Workflow for Refactoring safely.
Figure 4.1 — A repeatable workflow.

A useful comparison

Refactoring safely is like a route plan: it keeps each step connected to a destination.

Check your reasoning.

Quick check: What is the best first step for Refactoring safely?

  • Define the goal and constraints.
  • Copy an unverified example.
  • Skip measurement.
Answer

Define the goal and constraints. — A clear goal and constraints make decisions reviewable.