require 'dry/logic/predicates' RSpec.describe Dry::Logic::Predicates do describe '#excluded_from?' do let(:predicate_name) { :excluded_from? } context 'when value is not present in list' do let(:arguments_list) do [ [['Jill', 'John'], 'Jack'], [1..2, 0], [1..2, 3], [[nil, false], true] ] end it_behaves_like 'a passing predicate' end context 'with value is present in list' do let(:arguments_list) do [ [['Jill', 'John'], 'Jill'], [['Jill', 'John'], 'John'], [1..2, 1], [1..2, 2], [[nil, false], nil], [[nil, false], false] ] end it_behaves_like 'a failing predicate' end end end