ruby--ruby/spec/ruby/core/struct/select_spec.rb

require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/accessor'
require_relative '../enumerable/shared/enumeratorized'

describe "Struct#select" do
  it "raises an ArgumentError if given any non-block arguments" do
    lambda { StructClasses::Car.new.select(1) { } }.should raise_error(ArgumentError)
  end

  it "returns a new array of elements for which block is true" do
    struct = StructClasses::Car.new("Toyota", "Tercel", "2000")
    struct.select { |i| i == "2000" }.should == [ "2000" ]
  end

  it "returns an instance of Array" do
    struct = StructClasses::Car.new("Ford", "Escort", "1995")
    struct.select { true }.should be_an_instance_of(Array)
  end

  describe "without block" do
    it "returns an instance of Enumerator" do
      struct = Struct.new(:foo).new
      struct.select.should be_an_instance_of(Enumerator)
    end
  end

  it_behaves_like :struct_accessor, :select
  it_behaves_like :enumeratorized_with_origin_size, :select, Struct.new(:foo).new
end