Exercise 076: Assertions and Refutations #56

Exercise 076: Assertions and Refutations

Topic: Mix & Testing
Level: 18
Difficulty: 2

Prerequisites

• Exercise 075: ExUnit Basics
• Boolean logic

Learning Objectives

Students will learn to:

• Use various assertion functions
• Use refute for negative assertions
• Test equality, membership, and exceptions

Key Concepts

• assert vs refute
• assert_receive, assert_raise
• Testing different conditions

Exercise Structure

• Explain different assertion types
• Show examples: assert, refute, assert_raise
• Task: Write tests using multiple assertion types
• Expected output: Comprehensive test coverage

Hints

refute is for asserting something is false or nil

References

• Elixir docs: https://hexdocs.pm/ex_unit/ExUnit.Assertions.html