#! /usr/bin/env ruby

require File.dirname(__FILE__) + '/../../../spec_helper'

describe "the fqdn_rand function" do

    before :each do
        @scope = Puppet::Parser::Scope.new()
    end

    it "should exist" do
        Puppet::Parser::Functions.function("fqdn_rand").should == "function_fqdn_rand"
    end

    it "should handle 0 arguments" do
        @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1")
        lambda { @scope.function_fqdn_rand([]) }.should_not raise_error(Puppet::ParseError)
    end

    it "should handle 1 argument'}" do
        @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1")
        lambda { @scope.function_fqdn_rand([3]) }.should_not raise_error(Puppet::ParseError)
    end


    (1..10).each { |n|
        it "should handle #{n} additional arguments" do
            @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1")
            lambda { @scope.function_fqdn_rand([3,1,2,3,4,5,6,7,8,9,10][0..n]) }.should_not raise_error(Puppet::ParseError)
        end
        it "should handle #{n} additional string arguments" do
            @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1")
            lambda { @scope.function_fqdn_rand([3,%w{ 1 2 3 4 5 6 7 8 9 10}].flatten[0..n]) }.should_not raise_error(Puppet::ParseError)
        end
    }

    it "should return a value less than max" do
        @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1")
        @scope.function_fqdn_rand([3]).should satisfy {|n| n.to_i < 3 }
    end

    it "should return the same values on subsequent invocations for the same host" do
        @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1").twice
        @scope.function_fqdn_rand([3,4]).should eql(@scope.function_fqdn_rand([3, 4]))
    end

    it "should return different sequences of value for different hosts" do
        @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1")
        val1 = @scope.function_fqdn_rand([10000000,4])
        @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.2")
        val2 = @scope.function_fqdn_rand([10000000,4])
        val1.should_not eql(val2)
    end

    it "should return different values for the same hosts with different seeds" do
        @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1")
        val1 = @scope.function_fqdn_rand([10000000,4])
        @scope.expects(:lookupvar).with("fqdn").returns("127.0.0.1")
        val2 = @scope.function_fqdn_rand([10000000,42])
        val1.should_not eql(val2)
    end
end