require 'spec_helper' module Arel describe Attribute do before do @relation = Table.new(:users) @attribute = @relation[:id] end describe 'Attribute::Transformations' do describe '#as' do it "manufactures an aliased attributed" do @attribute.as(:alias).should == Attribute.new(@relation, @attribute.name, :alias => :alias, :ancestor => @attribute) end end describe '#bind' do it "manufactures an attribute with the relation bound and self as an ancestor" do derived_relation = @relation.where(@relation[:id].eq(1)) @attribute.bind(derived_relation).should == Attribute.new(derived_relation, @attribute.name, :ancestor => @attribute) end it "returns self if the substituting to the same relation" do @attribute.bind(@relation).should == @attribute end end describe '#to_attribute' do describe 'when the given relation is the same as the attributes relation' do it "returns self" do @attribute.to_attribute(@relation).should == @attribute end end describe 'when the given relation differs from the attributes relation' do it 'binds to the new relation' do @attribute.to_attribute(new_relation = @relation.alias).should == @attribute.bind(new_relation) end end end end describe '#column' do it "returns the corresponding column in the relation" do @attribute.column.should == @relation.column_for(@attribute) end end describe '#engine' do it "delegates to its relation" do Attribute.new(@relation, :id).engine.should == @relation.engine end end describe Attribute::Congruence do describe '/' do before do @aliased_relation = @relation.alias @doubly_aliased_relation = @aliased_relation.alias end describe 'when dividing two unrelated attributes' do it "returns 0.0" do (@relation[:id] / @relation[:name]).should == 0.0 end end describe 'when dividing two matching attributes' do it 'returns a the highest score for the most similar attributes' do check((@aliased_relation[:id] / @relation[:id]).should == (@aliased_relation[:id] / @relation[:id])) (@aliased_relation[:id] / @relation[:id]).should < (@aliased_relation[:id] / @aliased_relation[:id]) end end end end describe 'Attribute::Predications' do before do @attribute = Attribute.new(@relation, :name) end describe '#eq' do it "manufactures an equality predicate" do @attribute.eq('name').should == Predicates::Equality.new(@attribute, 'name') end end describe '#lt' do it "manufactures a less-than predicate" do @attribute.lt(10).should == Predicates::LessThan.new(@attribute, 10) end end describe '#lteq' do it "manufactures a less-than or equal-to predicate" do @attribute.lteq(10).should == Predicates::LessThanOrEqualTo.new(@attribute, 10) end end describe '#gt' do it "manufactures a greater-than predicate" do @attribute.gt(10).should == Predicates::GreaterThan.new(@attribute, 10) end end describe '#gteq' do it "manufactures a greater-than or equal-to predicate" do @attribute.gteq(10).should == Predicates::GreaterThanOrEqualTo.new(@attribute, 10) end end describe '#matches' do it "manufactures a match predicate" do @attribute.matches(/.*/).should == Predicates::Match.new(@attribute, /.*/) end end describe '#in' do it "manufactures an in predicate" do @attribute.in(1..30).should == Predicates::In.new(@attribute, (1..30)) end end end describe Attribute::Expressions do before do @attribute = Attribute.new(@relation, :name) end describe '#count' do it "manufactures a count Expression" do @attribute.count.should == Count.new(@attribute) end end describe '#sum' do it "manufactures a sum Expression" do @attribute.sum.should == Sum.new(@attribute) end end describe '#maximum' do it "manufactures a maximum Expression" do @attribute.maximum.should == Maximum.new(@attribute) end end describe '#minimum' do it "manufactures a minimum Expression" do @attribute.minimum.should == Minimum.new(@attribute) end end describe '#average' do it "manufactures an average Expression" do @attribute.average.should == Average.new(@attribute) end end end describe Attribute::Orderings do describe '#asc' do it 'manufactures an ascending ordering' do @attribute.asc.should == Ascending.new(@attribute) end end describe '#desc' do it 'manufactures a descending ordering' do @attribute.desc.should == Descending.new(@attribute) end end end end end