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Testing Rails Performance Metrics for Homepage Loading in brakeman

This performance test suite evaluates the browsing functionality of a Rails 3.1 application, focusing specifically on homepage response metrics. The test implements ActionDispatch::PerformanceTest to measure critical performance indicators like load time and memory usage.

Test Coverage Overview

The test suite provides baseline performance testing coverage for the application’s homepage endpoint.

Homepage GET request response testing
Basic routing verification
Performance metrics collection capability
Configurable test run parameters

Implementation Analysis

The implementation utilizes Rails’ built-in performance testing framework through ActionDispatch::PerformanceTest. The test structure follows Ruby on Rails conventions for performance testing, with configurable profile options for customizing test execution parameters and output formats.

Inherits from ActionDispatch::PerformanceTest
Configurable profile options for runs and metrics
Supports multiple output formats

Technical Details

Uses rails/performance_test_help library
Supports wall time and memory metrics tracking
Configurable output directory (tmp/performance)
Supports multiple format outputs including flat format
Customizable test runs count

Best Practices Demonstrated

The test implementation showcases several performance testing best practices in Rails applications. It demonstrates proper test isolation, clear metric configuration, and flexible output formatting.

Isolated test scope
Configurable performance metrics
Documentation-driven configuration
Standard Rails testing conventions

presidentbeef/brakeman

test/apps/rails3.1/test/performance/browsing_test.rb

            
require 'test_helper'
require 'rails/performance_test_help'

class BrowsingTest < ActionDispatch::PerformanceTest
  # Refer to the documentation for all available options
  # self.profile_options = { :runs => 5, :metrics => [:wall_time, :memory]
  #                          :output => 'tmp/performance', :formats => [:flat] }

  def test_homepage
    get '/'
  end
end