11 files changed, 469 insertions, 0 deletions
diff --git a/guides/bug_report_templates/action_controller_gem.rb b/guides/bug_report_templates/action_controller_gem.rb
new file mode 100644
index 0000000000..6c74200761
--- /dev/null
+++ b/guides/bug_report_templates/action_controller_gem.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  # Activate the gem you are reporting the issue against.
+  gem "rails", "5.2.0"
+end
+
+require "rack/test"
+require "action_controller/railtie"
+
+class TestApp < Rails::Application
+  config.root = __dir__
+  config.session_store :cookie_store, key: "cookie_store_key"
+  secrets.secret_key_base = "secret_key_base"
+
+  config.logger = Logger.new($stdout)
+  Rails.logger  = config.logger
+
+  routes.draw do
+    get "/" => "test#index"
+  end
+end
+
+class TestController < ActionController::Base
+  include Rails.application.routes.url_helpers
+
+  def index
+    render plain: "Home"
+  end
+end
+
+require "minitest/autorun"
+
+class BugTest < Minitest::Test
+  include Rack::Test::Methods
+
+  def test_returns_success
+    get "/"
+    assert last_response.ok?
+  end
+
+  private
+    def app
+      Rails.application
+    end
+end
diff --git a/guides/bug_report_templates/action_controller_master.rb b/guides/bug_report_templates/action_controller_master.rb
new file mode 100644
index 0000000000..6d53e957d9
--- /dev/null
+++ b/guides/bug_report_templates/action_controller_master.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  gem "rails", github: "rails/rails"
+end
+
+require "action_controller/railtie"
+
+class TestApp < Rails::Application
+  config.root = __dir__
+  secrets.secret_key_base = "secret_key_base"
+
+  config.logger = Logger.new($stdout)
+  Rails.logger  = config.logger
+
+  routes.draw do
+    get "/" => "test#index"
+  end
+end
+
+class TestController < ActionController::Base
+  include Rails.application.routes.url_helpers
+
+  def index
+    render plain: "Home"
+  end
+end
+
+require "minitest/autorun"
+require "rack/test"
+
+class BugTest < Minitest::Test
+  include Rack::Test::Methods
+
+  def test_returns_success
+    get "/"
+    assert last_response.ok?
+  end
+
+  private
+    def app
+      Rails.application
+    end
+end
diff --git a/guides/bug_report_templates/active_job_gem.rb b/guides/bug_report_templates/active_job_gem.rb
new file mode 100644
index 0000000000..eb9d1316e9
--- /dev/null
+++ b/guides/bug_report_templates/active_job_gem.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  # Activate the gem you are reporting the issue against.
+  gem "activejob", "5.2.0"
+end
+
+require "minitest/autorun"
+require "active_job"
+
+class BuggyJob < ActiveJob::Base
+  def perform
+    puts "performed"
+  end
+end
+
+class BuggyJobTest < ActiveJob::TestCase
+  def test_stuff
+    assert_enqueued_with(job: BuggyJob) do
+      BuggyJob.perform_later
+    end
+  end
+end
diff --git a/guides/bug_report_templates/active_job_master.rb b/guides/bug_report_templates/active_job_master.rb
new file mode 100644
index 0000000000..ae3ef7752f
--- /dev/null
+++ b/guides/bug_report_templates/active_job_master.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  gem "rails", github: "rails/rails"
+end
+
+require "active_job"
+require "minitest/autorun"
+
+class BuggyJob < ActiveJob::Base
+  def perform
+    puts "performed"
+  end
+end
+
+class BuggyJobTest < ActiveJob::TestCase
+  def test_stuff
+    assert_enqueued_with(job: BuggyJob) do
+      BuggyJob.perform_later
+    end
+  end
+end
diff --git a/guides/bug_report_templates/active_record_gem.rb b/guides/bug_report_templates/active_record_gem.rb
new file mode 100644
index 0000000000..d88304a219
--- /dev/null
+++ b/guides/bug_report_templates/active_record_gem.rb
@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  # Activate the gem you are reporting the issue against.
+  gem "activerecord", "5.2.0"
+  gem "sqlite3"
+end
+
+require "active_record"
+require "minitest/autorun"
+require "logger"
+
+# This connection will do for database-independent bug reports.
+ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
+ActiveRecord::Base.logger = Logger.new(STDOUT)
+
+ActiveRecord::Schema.define do
+  create_table :posts, force: true do |t|
+  end
+
+  create_table :comments, force: true do |t|
+    t.integer :post_id
+  end
+end
+
+class Post < ActiveRecord::Base
+  has_many :comments
+end
+
+class Comment < ActiveRecord::Base
+  belongs_to :post
+end
+
+class BugTest < Minitest::Test
+  def test_association_stuff
+    post = Post.create!
+    post.comments << Comment.create!
+
+    assert_equal 1, post.comments.count
+    assert_equal 1, Comment.count
+    assert_equal post.id, Comment.first.post.id
+  end
+end
diff --git a/guides/bug_report_templates/active_record_master.rb b/guides/bug_report_templates/active_record_master.rb
new file mode 100644
index 0000000000..780456b7b6
--- /dev/null
+++ b/guides/bug_report_templates/active_record_master.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  gem "rails", github: "rails/rails"
+  gem "sqlite3"
+end
+
+require "active_record"
+require "minitest/autorun"
+require "logger"
+
+# This connection will do for database-independent bug reports.
+ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
+ActiveRecord::Base.logger = Logger.new(STDOUT)
+
+ActiveRecord::Schema.define do
+  create_table :posts, force: true do |t|
+  end
+
+  create_table :comments, force: true do |t|
+    t.integer :post_id
+  end
+end
+
+class Post < ActiveRecord::Base
+  has_many :comments
+end
+
+class Comment < ActiveRecord::Base
+  belongs_to :post
+end
+
+class BugTest < Minitest::Test
+  def test_association_stuff
+    post = Post.create!
+    post.comments << Comment.create!
+
+    assert_equal 1, post.comments.count
+    assert_equal 1, Comment.count
+    assert_equal post.id, Comment.first.post.id
+  end
+end
diff --git a/guides/bug_report_templates/active_record_migrations_gem.rb b/guides/bug_report_templates/active_record_migrations_gem.rb
new file mode 100644
index 0000000000..5dfd49fb38
--- /dev/null
+++ b/guides/bug_report_templates/active_record_migrations_gem.rb
@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  # Activate the gem you are reporting the issue against.
+  gem "activerecord", "5.2.0"
+  gem "sqlite3"
+end
+
+require "active_record"
+require "minitest/autorun"
+require "logger"
+
+# This connection will do for database-independent bug reports.
+ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
+ActiveRecord::Base.logger = Logger.new(STDOUT)
+
+ActiveRecord::Schema.define do
+  create_table :payments, force: true do |t|
+    t.decimal :amount, precision: 10, scale: 0, default: 0, null: false
+  end
+end
+
+class Payment < ActiveRecord::Base
+end
+
+class ChangeAmountToAddScale < ActiveRecord::Migration[5.2]
+  def change
+    reversible do |dir|
+      dir.up do
+        change_column :payments, :amount, :decimal, precision: 10, scale: 2, default: 0, null: false
+      end
+
+      dir.down do
+        change_column :payments, :amount, :decimal, precision: 10, scale: 0, default: 0, null: false
+      end
+    end
+  end
+end
+
+class BugTest < Minitest::Test
+  def test_migration_up
+    ChangeAmountToAddScale.migrate(:up)
+    Payment.reset_column_information
+
+    assert_equal "decimal(10,2)", Payment.columns.last.sql_type
+  end
+
+  def test_migration_down
+    ChangeAmountToAddScale.migrate(:down)
+    Payment.reset_column_information
+
+    assert_equal "decimal(10,0)", Payment.columns.last.sql_type
+  end
+end
diff --git a/guides/bug_report_templates/active_record_migrations_master.rb b/guides/bug_report_templates/active_record_migrations_master.rb
new file mode 100644
index 0000000000..b0fe3bc660
--- /dev/null
+++ b/guides/bug_report_templates/active_record_migrations_master.rb
@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  gem "rails", github: "rails/rails"
+  gem "sqlite3"
+end
+
+require "active_record"
+require "minitest/autorun"
+require "logger"
+
+# This connection will do for database-independent bug reports.
+ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
+ActiveRecord::Base.logger = Logger.new(STDOUT)
+
+ActiveRecord::Schema.define do
+  create_table :payments, force: true do |t|
+    t.decimal :amount, precision: 10, scale: 0, default: 0, null: false
+  end
+end
+
+class Payment < ActiveRecord::Base
+end
+
+class ChangeAmountToAddScale < ActiveRecord::Migration[6.0]
+  def change
+    reversible do |dir|
+      dir.up do
+        change_column :payments, :amount, :decimal, precision: 10, scale: 2, default: 0, null: false
+      end
+
+      dir.down do
+        change_column :payments, :amount, :decimal, precision: 10, scale: 0, default: 0, null: false
+      end
+    end
+  end
+end
+
+class BugTest < Minitest::Test
+  def test_migration_up
+    ChangeAmountToAddScale.migrate(:up)
+    Payment.reset_column_information
+
+    assert_equal "decimal(10,2)", Payment.columns.last.sql_type
+  end
+
+  def test_migration_down
+    ChangeAmountToAddScale.migrate(:down)
+    Payment.reset_column_information
+
+    assert_equal "decimal(10,0)", Payment.columns.last.sql_type
+  end
+end
diff --git a/guides/bug_report_templates/benchmark.rb b/guides/bug_report_templates/benchmark.rb
new file mode 100644
index 0000000000..4a8ce787c7
--- /dev/null
+++ b/guides/bug_report_templates/benchmark.rb
@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  gem "rails", github: "rails/rails"
+  gem "benchmark-ips"
+end
+
+require "active_support"
+require "active_support/core_ext/object/blank"
+
+# Your patch goes here.
+class String
+  def fast_blank?
+    true
+  end
+end
+
+# Enumerate some representative scenarios here.
+#
+# It is very easy to make an optimization that improves performance for a
+# specific scenario you care about but regresses on other common cases.
+# Therefore, you should test your change against a list of representative
+# scenarios. Ideally, they should be based on real-world scenarios extracted
+# from production applications.
+SCENARIOS = {
+  "Empty"            => "",
+  "Single Space"     => " ",
+  "Two Spaces"       => "  ",
+  "Mixed Whitspaces" => " \t\r\n",
+  "Very Long String" => " " * 100
+}
+
+SCENARIOS.each_pair do |name, value|
+  puts
+  puts " #{name} ".center(80, "=")
+  puts
+
+  Benchmark.ips do |x|
+    x.report("blank?")      { value.blank? }
+    x.report("fast_blank?") { value.fast_blank? }
+    x.compare!
+  end
+end
diff --git a/guides/bug_report_templates/generic_gem.rb b/guides/bug_report_templates/generic_gem.rb
new file mode 100644
index 0000000000..3fd54437f7
--- /dev/null
+++ b/guides/bug_report_templates/generic_gem.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  # Activate the gem you are reporting the issue against.
+  gem "activesupport", "5.2.0"
+end
+
+require "active_support"
+require "active_support/core_ext/object/blank"
+require "minitest/autorun"
+
+class BugTest < Minitest::Test
+  def test_stuff
+    assert "zomg".present?
+    refute "".present?
+  end
+end
diff --git a/guides/bug_report_templates/generic_master.rb b/guides/bug_report_templates/generic_master.rb
new file mode 100644
index 0000000000..ec65fee292
--- /dev/null
+++ b/guides/bug_report_templates/generic_master.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  gem "rails", github: "rails/rails"
+end
+
+require "active_support"
+require "active_support/core_ext/object/blank"
+require "minitest/autorun"
+
+class BugTest < Minitest::Test
+  def test_stuff
+    assert "zomg".present?
+    refute "".present?
+  end
+end