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Testing Build Strategy Implementation in factory_bot

This test suite evaluates the Build strategy implementation in FactoryBot, focusing on core factory creation behaviors. It verifies association handling, callback execution, and build strategy consistency through shared example groups.

Test Coverage Overview

The test coverage focuses on three critical aspects of the FactoryBot Build strategy implementation. It validates association support with create strategy, ensures proper execution of after_build callbacks, and verifies build strategy consistency.

Association creation behavior validation
Callback execution verification
Build strategy implementation testing

Implementation Analysis

The testing approach utilizes RSpec shared examples to maintain consistent behavior verification across different strategy implementations. The code demonstrates elegant use of RSpec’s shared example groups to reduce duplication and ensure consistent testing patterns across strategy variants.

Shared example implementation for reusable test cases
Strategy-specific behavior verification
Consistent testing patterns across components

Technical Details

Testing Framework: RSpec
Test Type: Unit Test
Key Components:

FactoryBot::Strategy::Build class testing
RSpec shared example groups
Factory association handling
Callback execution verification

Best Practices Demonstrated

The test suite exemplifies excellent testing practices through its use of shared examples for consistent behavior verification. It demonstrates proper test isolation, clear behavior specification, and efficient test organization.

DRY testing through shared examples
Clear behavior specifications
Modular test organization
Comprehensive strategy verification

thoughtbot/factory_bot

spec/factory_bot/strategy/build_spec.rb

            
describe FactoryBot::Strategy::Build do
  it_should_behave_like "strategy with association support", :create
  it_should_behave_like "strategy with callbacks", :after_build
  it_should_behave_like "strategy with strategy: :build", :build
end