Refer to the following documents for help with setting up your tests.

Document Description
Configuration Reference run Step section Write a job to run your tests.
Browser Testing Common methods for running and debugging browser tests in CircleCI.
Collecting Test Metadata How to set up various common test runners in your CircleCI configuration.
Testing iOS Applications on macOS How to set up and customize testing for an iOS application with CircleCI.
Running Tests in Parallel How to glob and splitting tests inside a job.
Configuring Databases Configuring a database container using Postgres and Rails.
Code Signing  
Setting Up Code Signing for iOS Projects Describes the guidelines for setting up code signing for your iOS or Mac project on CircleCI 2.0.

We’re thrilled to have you here. Happy building!

The CircleCI Team