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Dependency Injection w/ Mocks
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RSpec.describe SongService do | |
require 'spec_helper' | |
subject { SongService.new(gateway_service: gateway_service) } | |
let(:song) { Song.new(name: 'Seek Up', artist: 'Dave Matthews Band', genre: 'Rock') } | |
context 'create_song using mocks' do | |
class MockSongGatewayService < SongGatewayService | |
def create_song(song) | |
song = song.clone | |
song.id = 'abc' | |
song.to_json | |
end | |
end | |
let(:gateway_service) { MockSongGatewayService.new } | |
it 'creates a valid song' do | |
new_song = subject.create_song(song) | |
expect(new_song.name).to eq song.name | |
expect(new_song.artist).to eq song.artist | |
expect(new_song.genre).to eq song.genre | |
expect(new_song.id).to_not be_nil | |
expect(new_song.id).to_not eq song.id | |
end | |
it 'raises a validation exception on required name field' do | |
song.name = nil | |
expect { subject.create_song(song) }.to raise_error | |
end | |
end | |
end |
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