# Inputs, data, and configuration — TDD & BDD

Source: https://www.geekswithgeeks.com/en/tdd-bdd/tdd-bdd-06

> Apply foundations 2 in TDD & BDD.

## Understand Inputs, data, and configuration

In **TDD & BDD**, use foundations 2 to connect the problem, constraints, and measurable outcome before selecting an approach.

## Practise the workflow

Start small, verify one result, and record what the evidence changes.

![A four-stage learning workflow.](assets/figures/tdd-bdd/section-2-map.svg) — Figure 2.1 — Understand, act, verify, improve.

## A useful comparison

Think of this as a route plan: each step should lead to a checked destination.

Check your reasoning.

**Quiz:** What should come before choosing an approach?

- [x] A clear goal and constraints.
- [ ] An unverified copy.
- [ ] No measurement.

*Answer:* A clear goal and constraints.. Evidence makes a decision reviewable.