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Contents
require 'spec_helper'
module Alf
describe Relation do
let(:tuples_by_sid){[
{:sid => 'S1', :name => 'Smith', :status => 20, :city => 'London'},
{:sid => 'S2', :name => 'Jones', :status => 10, :city => 'Paris'},
{:sid => 'S3', :name => 'Blake', :status => 30, :city => 'Paris'}
]}
let(:rel){ Relation.new tuples_by_sid.to_set }
let(:tuples_by_name){ tuples_by_sid.sort{|t1,t2| t1[:name] <=> t2[:name]} }
describe "coerce" do
subject{ Relation.coerce(arg) }
describe "with a Relation" do
let(:arg){ rel }
it{ should be_a(Relation) }
it{ should == rel }
end
describe "with a set of tuples" do
let(:arg){ tuples_by_name.to_set }
it{ should be_a(Relation) }
it{ should == rel }
end
describe "with an array of tuples" do
let(:arg){ tuples_by_name }
it{ should be_a(Relation) }
it{ should == rel }
end
describe "with an iterator" do
let(:arg){ Lispy.restrict(tuples_by_name, lambda{ true }) }
it{ should be_a(Relation) }
it{ should == rel }
end
describe "with unrecognized arg" do
let(:arg){ nil }
specify{ lambda{ subject }.should raise_error(ArgumentError) }
end
it "should be semi-aliased as []" do
Alf::Relation[*tuples_by_name].should == rel
end
end # coerce
end
end
Version data entries
10 entries across 10 versions & 1 rubygems