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Basic Factory Creation

Learn to create a factory and run the factory.

We'll cover the following...

The factory_bot provides four ways of turning a factory into a Ruby object. For the project factory we were looking at, the four ways are as follows:

The build(:project) method returns a model instance that has not been saved to the database.
The create(:project) method returns a model instance and saves it to the database.
The attributes_for(:project) returns a hash of all the factory attributes that are suitable for passing to ActiveRecord#new or ActiveRecord#create. This method is most often useful for creating a hash sent as params to a controller test.
The build_stubbed(:project) is almost magical. Like build, it returns an unsaved model object. Unlike build, it assigns a fake ActiveRecord ID to the model and stubs out database-interaction methods (like save) such that the test raises an exception if they are called.

The existing project_spec uses basic Project and Task instances. We can ...

Introduction

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Test-Driven Development Basics

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Use RSpec to Write Efficient Test Cases in the Rails Application

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Testing Models

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Using Test Doubles as Mocks and Stubs

Integration Testing with Capybara and Cucumber

Testing JavaScript: Integration Testing

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Testing Rails Display Elements

Minitest

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Running Tests Faster and Running Faster Tests

Testing Legacy Code

Basic Factory Creation