Question

I’m having an issue with using the let function provided by rspec:

In app/spec/class_spec.rb:

require 'spec_helper'
module App
   describe Class do
      let(:instance) {Class.new('param')}

      describe "#method" do
         it "does something" do
            instance.method(...)
            # clever test code
         end
      .
      .
      .
end

I’ve been following the RSpec book, and according to its examples (which worked through!) let should give me access to the variable instance for the rest of the ‘describe Class’ block. But I get the error:

Uninitialized constant App::instance

I also tried adding this code to no avail:

before :all do
    instance
end

What am I doing wrong?

Answer 1

Instead of

module App
   describe Class do

just use:

describe App::Class

and everything should be fine
hint: instead let(:instance) {Class.new('param')} you could write let(:instance) {described_class.new('param')}. It’s more clever.