Contents

# encoding: utf-8

require 'spec_helper'

describe Relation::Operation::Offset, '#each' do
  subject { object.each { |tuple| yields << tuple } }

  let(:object)   { described_class.new(order, 1)                   }
  let(:relation) { Relation.new([[:id, Integer]], [[1], [2], [3]]) }
  let(:order)    { relation.sort_by { |r| r.id }                   }
  let(:yields)   { []                                              }

  it_should_behave_like 'an #each method'

  it 'yields only tuples' do
    subject
    yields.each { |tuple| tuple.should be_instance_of(Tuple) }
  end

  it 'yields only tuples with the expected header' do
    subject
    yields.each { |tuple| tuple.header.should be(object.header) }
  end

  it 'yields only tuples with the expected data' do
    expect { subject }.to change { yields.dup }
      .from([])
      .to([[2], [3]])
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
axiom-0.1.1	spec/unit/axiom/relation/operation/offset/each_spec.rb