require 'spec_helper'

describe '#msetnx(key, value [, key, value, ...])' do
  before do
    @key1 = 'mock-redis-test:msetnx1'
    @key2 = 'mock-redis-test:msetnx2'
  end

  it "responds with 1 if any keys were set" do
    @redises.msetnx(@key1, 1).should be_true
  end

  it "sets the values" do
    @redises.msetnx(@key1, 'value1', @key2, 'value2')
    @redises.mget(@key1, @key2).should == %w[value1 value2]
  end

  it "does nothing if any value is already set" do
    @redises.set(@key1, "old1")
    @redises.msetnx(@key1, 'value1', @key2, 'value2')
    @redises.mget(@key1, @key2).should == ["old1", nil]
  end

  it "responds with 0 if any value is already set" do
    @redises.set(@key1, "old1")
    @redises.msetnx(@key1, 'value1', @key2, 'value2').should be_false
  end

  it "raises an error if given an odd number of arguments" do
    lambda do
      @redises.msetnx(@key1, 'value1', @key2)
    end.should raise_error(RuntimeError)
  end

  it "raises an error if given 0 arguments" do
    lambda do
      @redises.msetnx()
    end.should raise_error(RuntimeError)
  end
end