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Contents
require 'spec_helper'
module Alf
module Operator::Relational
describe Project do
let(:operator_class){ Project }
it_should_behave_like("An operator class")
let(:input) {[
{:a => "a", :b => "b"},
{:a => "a", :b => "b"},
]}
subject{ operator.to_a }
context "--no-allbut" do
let(:expected){[{:a => "a"}]}
context "with Lispy" do
let(:operator){ Lispy.project(input, [:a]) }
it { should eq(expected) }
end
end # --no-allbut
context "--allbut" do
let(:expected){[{:b => "b"}]}
context "and factored with Lispy#project" do
let(:operator){ Lispy.project(input, [:a], :allbut => true) }
it { should eq(expected) }
end
context "and factored with Lispy#allbut" do
let(:operator){ Lispy.allbut(input, [:a]) }
it { should eq(expected) }
end
end # --allbut
context "when all is projected" do
let(:expected){[{}]}
context "with empty attributes" do
let(:operator){ Lispy.project(input, []) }
it { should eq(expected) }
end
context "when empty attributes and input" do
let(:operator){ Lispy.project([], []) }
it { should == [] }
end
context "--allbut" do
let(:operator){ Lispy.project(input, [:a, :b], :allbut => true) }
it { should eq(expected) }
end
end # all attributes projected
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems