Rails: accessing controller instance variables in rpec test

Question

In an Rspec controller test I want to check the values of instance variables in my the controller that I am testing.

For example,

controller:

class ThingsController < ApplicationController
  def index
    @things = Thing.all
  end
end

spec:

RSpec.describe UsersController, type: :controller do
  describe 'GET #index' do 
    expect(@things).to_not be_nil
  end
end

How do I access @things in the above example?

Michael Kohl · Accepted Answer · 2017-09-05 07:42:36Z

2

This should do the trick:

expect(assigns(:things)).to_not be_nil

More likely you'll want something like:

let(:thing) { ... }
...
expect(assigns(:things)).to eq([thing])

answered Sep 5, 2017 at 7:42

Michael Kohl

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