Skip to content

Instantly share code, notes, and snippets.

Show Gist options
  • Save amed/0054e6631eea64d9f3511d91acc989da to your computer and use it in GitHub Desktop.
Save amed/0054e6631eea64d9f3511d91acc989da to your computer and use it in GitHub Desktop.
RSpec Cheatsheet
require 'rails_helper'
RSpec.describe TodosController, :type => :controller do
context "GET index" do
#context "POST create" do
#context "GET show" do
#context "PATCH update" do (or PUT update)
#context "DELETE destroy" do
#context "GET new" do
#context "GET edit" do
# NORMALLY, you DO NOT want render_views, or you only want to call it in
# a single context.
# More on render_views:
# https://www.relishapp.com/rspec/rspec-rails/v/3-1/docs/controller-specs/render-views
render_views # ONLY have this if you're certain you need it
it "reads like a sentence (almost)" do
get :index
params = { id: 123 }
get :edit, params
params = { widget: { description: 'Hello World' } }
params.merge!(format: :js) # Specify format for AJAX/JS responses (e.g. create.js.erb view)
post :create, params
# Testing 404s in controllers (assuming default Rails handling of RecordNotFound)
expect { delete :destroy, { id: 'unknown' } }.to raise_error(ActiveRecord::RecordNotFound)
# Rails `:symbolized` status codes at end of each status code page at http://httpstatus.es/
expect(response).to have_http_status(:success) # 200
expect(response).to have_http_status(:forbidden) # 403
expect(response).to redirect_to foo_path
expect(response).to render_template(:template_filename_without_extension)
expect(response).to render_template(:destroy)
# Need response.body? Requires render_views call outside "it" block (see above & read given URL)
expect(response.body).to match /Bestsellers/
expect(response.body).to include "Bestsellers"
expect(response.headers["Content-Type"]).to eq "text/html; charset=utf-8"
expect(response.headers["Content-Type"]).to eq "text/javascript; charset=utf-8"
# assigns(:foobar) accesses the @foobar instance variable
# the controller method made available to the view
# Think of assigns(:widgets) as @widgets in the controller method
expect(assigns(:widgets)).to eq([widget1, widget2, widget3])
# Think of assigns(:product) as @product in the controller method
expect(assigns(:product)).to eq(bestseller)
expect(assigns(:cat)).to be_cool # cat.cool is a boolean, google "rspec predicate matchers"
expect(assigns(:employee)).to be_a_new(Employee)
# Asserting flash messages
expect(flash[:notice]).to eq "Congratulations on buying our stuff!"
expect(flash[:error]).to eq "Buying our stuff failed :-("
expect(flash[:alert]).to eq "You didn't buy any of our stuff!!!"
# Oi Eliot - TODO: add cookies and session examples here
# Query the db to assert changes persisted
expect(Invoice.count).to eq(1)
# Reload from db an object fetched in test setup when its record in db
# is updated by controller method, otherwise you're testing stale data
employee.reload
invoice.reload
product.reload
widget.reload
end
end
end
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment