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Some Quick Tips for Tips for Testing Your Rails App

RSpec Mocks

by Leo Liang

Environment Variables

There might be times when you need to mock a certain value for ENV without overriding other values. This can be easily achieved as follows:

    before do
      allow(ENV).to receive(:[]).and_call_original
      allow(ENV).to receive(:[]).with('REPORT_ID').and_return('5707702298738688')

This will only stub ENV[‘REPORT_ID’] and return value for all the other env vars.

Normally we use Timecop to set dates. But you need to remember to run Timecop.return afterwards to avoid any unexpected behaviour:

    describe "some set of tests to mock" do
        before do

        after do

        it "should do blah blah blah" do

Using Faker for Factories

by Sameera Gayan

Faker for Factories makes it easier when trying to create multiple records with uniq validations.


Lets say we have a User model with uniq email.

#without using Faker
FactoryGirl.define do
  factory :user do
    email ""

FactoryGirl.create_list(:user, 25) # this will fail as the email us not uniq

#with faker 
FactoryGirl.define do
  factory :user do
    email { }

FactoryGirl.create_list(:user, 25) # ✅ 💵

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