require 'spec_helper'

describe '#lpop(key)' do
  before { @key = 'mock-redis-test:65374' }

  it "returns and removes the first element of a list" do
    @redises.lpush(@key, 1)
    @redises.lpush(@key, 2)

    @redises.lpop(@key).should == "2"

    @redises.llen(@key).should == 1
  end

  it "returns nil if the list is empty" do
    @redises.lpush(@key, 'foo')
    @redises.lpop(@key)

    @redises.lpop(@key).should be_nil
  end

  it "returns nil for nonexistent values" do
    @redises.lpop(@key).should be_nil
  end

  it "removes empty lists" do
    @redises.lpush(@key, 'foo')
    @redises.lpop(@key)

    @redises.get(@key).should be_nil
  end

  it_should_behave_like "a list-only command"
end