ActiveModel::Lint tests for MiniTest 5

shared_examples_for_active_model.rb

shared_examples_for "ActiveModel" do
  require 'minitest/assertions'
  require 'active_model/lint'
  include MiniTest::Assertions
  include ActiveModel::Lint::Tests

  # This is the main difference between MiniTest 4 and 5.
  # We must keep a counter of assertions.
  attr_accessor :assertions

  before do
    @model = subject
    @assertions = 0
  end

  ActiveModel::Lint::Tests.public_instance_methods.map { |method|
    method.to_s
  }.grep(/^test/).each do |method|
    example(method.gsub('_', ' ')) { send method }
  end
end