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# encoding: utf-8 require 'spec_helper' describe Algebra::Difference, '#delete' do subject { object.delete(other) } let(:object) { described_class.new(left, right) } let(:left) { Relation.new(header, [ [ 1 ], [ 2 ], [ 3 ] ]) } let(:right) { Relation.new(header, [ [ 1 ] ]) } let(:other_relation) { Relation.new(header, [ [ 2 ] ]) } let(:header) { [ [ :id, Integer ] ] } shared_examples_for 'Algebra::Difference#delete' do it { should be_instance_of(described_class) } its(:left) { should eql(left.delete(other_relation.difference(right))) } its(:right) { should eql(right) } its(:header) { should == header } it 'deletes the tuples' do should == [ [ 3 ] ] end end context 'with a relation' do let(:other) { other_relation } it_should_behave_like 'Algebra::Difference#delete' end context 'with an array of tuples' do let(:other) { other_relation.to_a } it_should_behave_like 'Algebra::Difference#delete' end context 'with an array of arrays' do let(:other) { other_relation.map(&:to_ary) } it_should_behave_like 'Algebra::Difference#delete' end end
Version data entries
1 entries across 1 versions & 1 rubygems
Version | Path |
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axiom-0.1.0 | spec/unit/axiom/algebra/difference/delete_spec.rb |