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Contents
require 'spec_helper'
module Alf
describe Viewpoint, "parse" do
subject{ viewpoint.parse(&expr) }
context 'on predicate expressions' do
let(:viewpoint){ Viewpoint }
let(:expr){ ->{ eq(:x, 2) } }
it{ should be_a(Predicate) }
end
context 'on relational expressions' do
let(:viewpoint){ Viewpoint }
let(:expr){ ->{ restrict(:suppliers, ->{ sid == 'S1' }) } }
it{ should be_a(Algebra::Restrict) }
end
context 'on a sub-viewpoint' do
let(:viewpoint){
Module.new{
include Alf::Viewpoint
def hello; "world"; end
}
}
let(:expr){ ->{ hello } }
it 'uses the expected binding' do
subject.should eq("world")
end
end
end
end
Version data entries
4 entries across 4 versions & 1 rubygems