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Contents
require 'spec_helper'
module Alf
module Operator::Relational
describe Join do
let(:suppliers){Relation.coerce [
{:sid => 'S1', :city => 'London'},
{:sid => 'S2', :city => 'Paris'},
{:sid => 'S3', :city => 'Paris'},
{:sid => 'S4', :city => 'London'},
{:sid => 'S5', :city => 'Athens'},
]}
describe "when applied to sub-relations" do
let(:suppliers_by_city){Relation.coerce(
Lispy.group(suppliers, [:sid], :suppliers)
)}
let(:s2_s3){Relation.coerce([
{:sid => 'S3'},
{:sid => 'S2'}
])}
let(:right){Relation.coerce([
{:suppliers => s2_s3, :hello => "world"}
])}
let(:expected){Relation.coerce([
{:suppliers => s2_s3, :hello => "world", :city => 'Paris'}
])}
subject{Relation.coerce(
Lispy.join(suppliers_by_city, right)
)}
it{ should == expected }
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems