Dependency Injection causing both Rspec failure and IRB failure - ruby

Question

Note: I am a Ruby and programming novice.
I have a class called JourneyLog I am trying to get a method called start to instantiate a new instance of another class, called Journey
class JourneyLog
attr_reader :journey_class
def initialize(journey_class: Journey)
#journey_class = journey_class
#journeys = []
end
def start(station)
journey_class.new(entry_station: station)
end
end
When I go into irbi get the following issue
2.2.3 :001 > require './lib/journeylog'
=> true
2.2.3 :002 > journeylog = JourneyLog.new
NameError: uninitialized constant JourneyLog::Journey
from /Users/BartJudge/Desktop/Makers_2018/oystercard-challenge/lib/journeylog.rb:4:in `initialize'
from (irb):2:in `new'
from (irb):2
from /Users/BartJudge/.rvm/rubies/ruby-2.2.3/bin/irb:15:in `<main>'
2.2.3 :003 >
I also have the following Rspec test
require 'journeylog'
describe JourneyLog do
let(:journey) { double :journey, entry_station: nil, complete?: false, fare: 1}
let(:station) { double :station }
let(:journey_class) { double :journey_class, new: journey }
describe '#start' do
it 'starts a journey' do
expect(journey_class).to receive(:new).with(entry_station: station)
subject.start(station)
end
end
end
I get the following Rspec failure;
1) JourneyLog#start starts a journey
Failure/Error: expect(journey_class).to receive(:new).with(entry_station: station)
(Double :journey_class).new({:entry_station=>#<Double :station>})
expected: 1 time with arguments: ({:entry_station=>#<Double :station>})
received: 0 times
# ./spec/jorneylog_spec.rb:9:in `block (3 levels) in <top (required)>'
I am at a total loss on what the problem is, or where to look for some answers.
I'm assuming I'm not injecting the Journey class properly, but thats as far as I can get myself.
Could someone provide some assistance?

Answer 1

In the journeylog.rb file you need to load the Journey class:
require 'journey' # I guess the Journey class is defined in lib/journey.rb
In the spec file you need to pass journey_class to the JourneyLog constructor:
describe JourneyLog do
subject { described_class.new(journey_class: journey_class) }
# ...