common_assertions

✅ Using Common Assertions

Minitest provides a rich set of assertion methods to verify behavior. Use assert_equal for value comparison, assert_nil to check for nil, and assert_includes to verify a collection contains an element. Applying the right assertion makes failures easier to understand.

require 'minitest/autorun'

class AssertionTest < Minitest::Test
  def test_collection
    list = [1, 2, 3]
    assert_includes list, 2
    assert_equal 3, list.size
    assert_nil nil
  end
end