Ruby 3 · Errors and files

Write a test

A Minitest test, which ships with Ruby.

require "minitest/autorun"

class MathTest < Minitest::Test
  def test_addition
    assert_equal 4, 2 + 2
  end
end

Official Ruby 3 documentation

More errors and files commands

All errors and files commands · Ruby 3 cheatsheet

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