require 'dry/logic/predicates' RSpec.describe Dry::Logic::Predicates, '#is?' do let(:predicate_name) { :is? } let(:one) { Object.new } let(:two) { Object.new } context 'when value is equal to the arg' do let(:arguments_list) do [[one, one], [:one, :one]] end it_behaves_like 'a passing predicate' end context 'with value is not equal to the arg' do let(:arguments_list) do # Strings are not equal. Yet [[one, two], ['one', 'one']] end it_behaves_like 'a failing predicate' end end