Contents

# encoding: utf-8

require 'spec_helper'

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

  let(:object) { described_class.new(header, body)   }
  let(:header) { [[:id, Integer]]                    }
  let(:body)   { LazyEnumerable.new([[1], [2], [2]]) }
  let(:yields) { []                                  }

  before do
    object.should be_instance_of(described_class)
  end

  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([[1], [2]])
  end
end

describe Relation do
  subject { object.new(header, body) }

  let(:header) { [[:id, Integer]]          }
  let(:body)   { LazyEnumerable.new([[1]]) }
  let(:object) { described_class           }

  before do
    subject.should be_instance_of(object)
  end

  it { should be_kind_of(Enumerable) }

  it 'case matches Enumerable' do
    (Enumerable === subject).should be(true)
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

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