require 'spec_helper'

describe Immutable::List do
  describe '#all?' do
    context 'on a really big list' do
      let(:list) { BigList }

      it "doesn't run out of stack" do
        -> { list.all? }.should_not raise_error
      end
    end

    context 'when empty' do
      it 'with a block returns true' do
        L.empty.all? {}.should == true
      end

      it 'with no block returns true' do
        L.empty.all?.should == true
      end
    end

    context 'when not empty' do
      context 'with a block' do
        let(:list) { L['A', 'B', 'C'] }

        context 'if the block always returns true' do
          it 'returns true' do
            list.all? { |item| true }.should == true
          end
        end

        context 'if the block ever returns false' do
          it 'returns false' do
            list.all? { |item| item == 'D' }.should == false
          end
        end
      end

      context 'with no block' do
        context 'if all values are truthy' do
          it 'returns true' do
            L[true, 'A'].all?.should == true
          end
        end

        [nil, false].each do |value|
          context "if any value is #{value.inspect}" do
            it 'returns false' do
              L[value, true, 'A'].all?.should == false
            end
          end
        end
      end
    end
  end
end