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# encoding: utf-8
require 'spec_helper'
require File.expand_path('../../../fixtures/classes', __FILE__)
describe Memoizable::MethodBuilder, '.new' do
subject { described_class.new(descendant, method_name, freezer) }
let(:descendant) { Fixture::Object }
let(:freezer) { lambda { |object| object.freeze } }
context 'with a zero arity method' do
let(:method_name) { :zero_arity }
it { should be_instance_of(described_class) }
it 'sets the original method' do
# original method is not memoized
method = subject.original_method.bind(descendant.new)
expect(method.call).to_not be(method.call)
end
end
context 'with a one arity method' do
let(:method_name) { :one_arity }
it 'raises an exception' do
expect { subject }.to raise_error(
described_class::InvalidArityError,
'Cannot memoize Fixture::Object#one_arity, its arity is 1'
)
end
end
end
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