Testing Patterns with testthat

What problem does it solve?

This Skill provides a comprehensive guide to writing robust and effective tests for R packages using the testthat framework, ensuring code quality and reliability.

Core Features & Use Cases

• Test Structure: Learn best practices for organizing test files and individual tests.
• Expectations: Master various expect_ functions for asserting conditions, including equality, identity, errors, and warnings.
• Snapshot Testing: Capture and compare output to ensure stability.
• Test Isolation: Utilize withr for clean and reproducible test environments.
• Use Case: You've written a new R function and need to ensure it behaves correctly under various conditions, including edge cases and invalid inputs. This Skill guides you through creating a testthat suite to verify your function's logic and error handling.

Quick Start

Use the testing patterns skill to learn how to set up testthat 3rd edition in your R package.