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Contents
require 'spec_helper'
module Alf
module Engine
describe Join::Hash do
let(:suppliers) {[
{:sid => 'S1', :city => 'London'},
{:sid => 'S2', :city => 'Paris'},
{:sid => 'S3', :city => 'Paris'}
]}
let(:statuses) {[
{:sid => 'S1', :status => 20},
{:sid => 'S2', :status => 10},
{:sid => 'S3', :status => 30}
]}
let(:countries) {[
{:city => 'London', :country => 'England'},
{:city => 'Paris', :country => 'France'},
{:city => 'Bruxelles', :country => 'Belgium'}
]}
context "when applied on candidate keys on both sides" do
subject{ Join::Hash.new(suppliers, statuses).to_a }
let(:expected){[
{:sid => 'S1', :city => 'London', :status => 20},
{:sid => 'S2', :city => 'Paris', :status => 10},
{:sid => 'S3', :city => 'Paris', :status => 30}
]}
it { should == expected }
end
context "when applied on a typical foreign key" do
subject{ Join::Hash.new(suppliers, countries).to_a }
let(:expected){[
{:sid => 'S1', :city => 'London', :country => 'England'},
{:sid => 'S2', :city => 'Paris', :country => 'France'},
{:sid => 'S3', :city => 'Paris', :country => 'France'}
]}
it { should == expected }
end
context "when applied with no attributes in common" do
subject{ Join::Hash.new(statuses, countries).to_a }
let(:expected){
statuses.collect{|s| countries.collect{|c| c.merge(s)}}.flatten
}
it { should == expected }
end
end
end # module Engine
end # module Alf
Version data entries
9 entries across 9 versions & 2 rubygems