I'm going through Section 3.3 of The Ruby on Rails Tutorial by Michael Hartl and we just started the section on testing. In this section, we're grouping static pages in a controller (StaticPagesController) and are trying manually to add an "about" action to the controller. Because we are practicing TDD, we are writing a failing test first. However, the outputted error message is extremely long (I don't know if this is standard), and I want to know if there is a way to shorten the output. Thanks in advance!

test/controllers/static_pages_controller_test.rb: we write the following code (two previous and passing tests omitted for brevity):

require "test_helper"

class StaticPagesControllerTest < ActionDispatch::IntegrationTest
  test "should get about" do
    get static_pages_about_url
    assert_response :success
  end
end

I then run the following command in the terminal to run the tests:

% rails test

As expected, the output to the terminal shows 1 error. However, the error is extremely long (so long that it does not fit in the VS Code terminal -- I have to view it in the system terminal) and I have to scroll up hundreds of lines to see the start of the offending error.

Sample of Error:

Minitest::UnexpectedError: NameError: undefined local variable or method `static_pages_about_url' for #<StaticPagesControllerTest:0x00007fefbd442320 @_routes=nil, @NAME="test_should_get_about", @failures=[#<Minitest::UnexpectedError: Unexpected exception>], @assertions=0, @integration_session=#<#<Class:0x00007fefbd441c40>:0x00007fefbd4414c0 @_routes=nil, @app=#<SampleApp::Application:0x00007fefbd2fc308 @_all_autoload_paths=["/Users/christophermarchant/Documents/odin-project/full-stack-ruby/rails-course/hartl_rails_tutorial/sample_app/environment/sample_app/app/channels", "/Users/christophermarchant/Documents/odin-project/full-stack-ruby/rails-course/hartl_rails_tutorial/sample_app/environment/sample_app/app/controllers", ... @stubs=#<Concurrent::Map:0x00007fefbcd08550 entries=0 default_proc=#<Proc:0x00007fefbcd084b0 /Users/christophermarchant/.rbenv/versions/3.0.3/lib/ruby/gems/3.0.0/gems/activesupport-6.1.5/lib/active_support/testing/time_helpers.rb:14>>>, @time=0.12419799994677305>

The entire error is much longer.

It appears that Rails is inspecting and printing the entire StaticPagesControllerTest object with all of its attributes.

MAIN QUESTION: Is there a way to change some configuration so the NameError is shorter, like the following?

NameError: undefined local variable or method `static_pages_about_url' for #<StaticPagesControllerTest:0x00007fefbd442320>

OTHER INFO

Gemfile:

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '3.0.3'
gem 'rails', '~> 6.1.5'
gem 'puma', '~> 5.0'
gem 'sass-rails', '>= 6'
gem 'webpacker', '~> 5.0'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.7'

gem 'bootsnap', '>= 1.4.4', require: false

group :development, :test do
  gem 'sqlite3', '~> 1.4'
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
  gem 'web-console', '>= 4.1.0'
  gem 'rack-mini-profiler', '~> 2.0'
  gem 'listen', '~> 3.3'
  gem 'spring'
end

group :test do
  gem 'capybara', '>= 3.26'
  gem 'selenium-webdriver', '>= 4.0.0.rc1'
  gem 'webdrivers', '~> 5.0'
  gem 'rails-controller-testing', '~> 1.0', '>= 1.0.5'
  gem 'minitest', '~> 5.15'
  gem 'minitest-reporters', '~> 1.5'
  gem 'guard', '~> 2.18'
  gem 'guard-minitest', '~> 2.4', '>= 2.4.6'
end

group :production do
  gem 'pg', '~> 1.3', '>= 1.3.4'
end

gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

test/test_helper.rb file:

ENV['RAILS_ENV'] ||= 'test'
require_relative "../config/environment"
require "rails/test_help"
require "minitest/reporters"

class ActiveSupport::TestCase
  # Run tests in parallel with specified workers
  parallelize(workers: :number_of_processors)

  # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
  fixtures :all

  # Add more helper methods to be used by all tests here...
end

Minitest::Reporters.use!(
  Minitest::Reporters::SpecReporter.new(:color => true),
  ENV,
  Minitest.backtrace_filter
)

System and Versions:

Ruby on Rails 6.1.5

Ruby 3.0.3p157

macOS Big Sur Version 11.6.4