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Testing Unused Eager Loading Notifications in Bullet

This test suite examines the UnusedEagerLoading notification functionality in the Bullet gem, focusing on detecting and reporting unnecessary eager loading in Rails applications. The tests verify proper formatting and content of notification messages when unused eager loading is detected.

Test Coverage Overview

The test suite provides coverage for the UnusedEagerLoading notification class, specifically validating message formatting and content structure.

Tests notification body format for eager loading warnings
Verifies correct title generation for notification messages
Validates handling of model associations (comments and votes)
Ensures proper path inclusion in notifications

Implementation Analysis

The testing approach utilizes RSpec’s describe and subject blocks to organize test cases efficiently.

Implementation leverages RSpec expectations with string matching to verify notification formatting. The tests demonstrate proper usage of subject blocks and string comparison for validation of notification messages.

Technical Details

Testing tools and configuration:

RSpec testing framework
Bullet gem integration
Mock Post model with comments and votes associations
String comparison for message validation
Subject block pattern for test organization

Best Practices Demonstrated

The test suite exemplifies several testing best practices in Ruby and RSpec.

Clear test organization using describe blocks
Efficient use of subject blocks for DRY testing
Explicit expectation matching
Focused test cases with single responsibility
Proper module and class scoping

flyerhzm/bullet

spec/bullet/notification/unused_eager_loading_spec.rb

            
# frozen_string_literal: true

require 'spec_helper'

module Bullet
  module Notification
    describe UnusedEagerLoading do
      subject { UnusedEagerLoading.new([''], Post, %i[comments votes], 'path') }

      it do
        expect(subject.body).to eq(
          "  Post => [:comments, :votes]
  Remove from your query: .includes([:comments, :votes])"
        )
      end
      it { expect(subject.title).to eq('AVOID eager loading in path') }
    end
  end
end