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Testing Factory Registration Without Implementation Blocks in factory_bot

This test suite examines the core functionality of FactoryBot’s factory definition system without explicit blocks. It specifically validates the registration and instantiation of basic model factories, demonstrating the framework’s ability to handle minimal factory definitions.

Test Coverage Overview

The test coverage focuses on validating the fundamental factory registration process in FactoryBot. Key functionality includes:

Basic factory definition without implementation blocks
Factory registration in FactoryBot’s internal registry
Verification of factory object instantiation

Implementation Analysis

The testing approach utilizes RSpec’s describe/it blocks to validate factory registration. The implementation leverages FactoryBot’s internal API to verify proper factory object creation and registration, using define_model helper for test setup and expectation matching for verification.

Technical Details

Testing tools and configuration:

RSpec testing framework
FactoryBot’s Internal API access
Custom model definition helpers
Factory registration verification

Best Practices Demonstrated

The test exemplifies several testing best practices:

Isolated test setup using before blocks
Clear separation of arrangement and assertion
Direct verification of internal state
Focused test scope with single responsibility

thoughtbot/factory_bot

spec/acceptance/definition_without_block_spec.rb

            
describe "an instance generated by a factory" do
  before do
    define_model("User")

    FactoryBot.define do
      factory :user
    end
  end

  it "registers the user factory" do
    expect(FactoryBot::Internal.factory_by_name(:user))
      .to be_a(FactoryBot::Factory)
  end
end