# encoding: utf-8 require 'spec_helper' describe Function::Predicate::Exclusion, '.call' do subject { object.call(left, right) } let(:object) { described_class } context 'when left is excluded from right' do let(:left) { 1 } let(:right) { [ 0 ] } it { should be(true) } end context 'when left is not excluded from right' do let(:left) { 1 } let(:right) { [ 1 ] } it { should be(false) } end end