transferred Code Ocean from original repository to GitHub

db/migrate/20140625134118_create_exercises.rb

@@ -0,0 +1,11 @@
+class CreateExercises < ActiveRecord::Migration
+  def change
+    create_table :exercises do |t|
+      t.text :description
+      t.belongs_to :execution_environment
+      t.text :template_code
+      t.string :title
+      t.timestamps
+    end
+  end
+end

db/migrate/20140626143132_create_execution_environments.rb

@@ -0,0 +1,11 @@
+class CreateExecutionEnvironments < ActiveRecord::Migration
+  def change
+    create_table :execution_environments do |t|
+      t.string :docker_image
+      t.string :editor_mode
+      t.string :file_extension
+      t.string :name
+      t.timestamps
+    end
+  end
+end

db/migrate/20140626144036_create_submissions.rb

@@ -0,0 +1,11 @@
+class CreateSubmissions < ActiveRecord::Migration
+  def change
+    create_table :submissions do |t|
+      t.text :code
+      t.belongs_to :exercise
+      t.float :score
+      t.belongs_to :user
+      t.timestamps
+    end
+  end
+end

db/migrate/20140630093736_add_reference_implementation_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddReferenceImplementationToExercises < ActiveRecord::Migration
+  def change
+    add_column :exercises, :reference_implementation, :text
+  end
+end

db/migrate/20140630111215_add_indent_size_to_execution_environments.rb

@@ -0,0 +1,5 @@
+class AddIndentSizeToExecutionEnvironments < ActiveRecord::Migration
+  def change
+    add_column :execution_environments, :indent_size, :integer
+  end
+end

db/migrate/20140701120126_create_consumers.rb

@@ -0,0 +1,8 @@
+class CreateConsumers < ActiveRecord::Migration
+  def change
+    create_table :consumers do |t|
+      t.string :name
+      t.timestamps
+    end
+  end
+end

db/migrate/20140701122345_create_users.rb

@@ -0,0 +1,11 @@
+class CreateUsers < ActiveRecord::Migration
+  def change
+    create_table :users do |t|
+      t.belongs_to :consumer
+      t.string :email
+      t.string :external_id
+      t.string :name
+      t.timestamps
+    end
+  end
+end

db/migrate/20140702100130_add_oauth_key_to_consumers.rb

@@ -0,0 +1,5 @@
+class AddOauthKeyToConsumers < ActiveRecord::Migration
+  def change
+    add_column :consumers, :oauth_key, :string
+  end
+end

db/migrate/20140703070749_add_oauth_secret_to_consumers.rb

@@ -0,0 +1,5 @@
+class AddOauthSecretToConsumers < ActiveRecord::Migration
+  def change
+    add_column :consumers, :oauth_secret, :string
+  end
+end

db/migrate/20140716153147_add_role_to_users.rb

@@ -0,0 +1,5 @@
+class AddRoleToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :role, :string
+  end
+end

db/migrate/20140717074902_add_user_id_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddUserIdToExercises < ActiveRecord::Migration
+  def change
+    add_reference :exercises, :user
+  end
+end

db/migrate/20140722125431_add_run_command_to_execution_environments.rb

@@ -0,0 +1,5 @@
+class AddRunCommandToExecutionEnvironments < ActiveRecord::Migration
+  def change
+    add_column :execution_environments, :run_command, :string
+  end
+end

db/migrate/20140723135530_add_test_command_to_execution_environments.rb

@@ -0,0 +1,5 @@
+class AddTestCommandToExecutionEnvironments < ActiveRecord::Migration
+  def change
+    add_column :execution_environments, :test_command, :string
+  end
+end

db/migrate/20140723135747_add_test_code_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddTestCodeToExercises < ActiveRecord::Migration
+  def change
+    add_column :exercises, :test_code, :text
+  end
+end

db/migrate/20140724155359_add_cause_to_submissions.rb

@@ -0,0 +1,5 @@
+class AddCauseToSubmissions < ActiveRecord::Migration
+  def change
+    add_column :submissions, :cause, :string
+  end
+end

db/migrate/20140730114343_add_template_test_code_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddTemplateTestCodeToExercises < ActiveRecord::Migration
+  def change
+    add_column :exercises, :template_test_code, :text
+  end
+end

db/migrate/20140730115010_add_supports_user_defined_tests_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddSupportsUserDefinedTestsToExercises < ActiveRecord::Migration
+  def change
+    add_column :exercises, :supports_user_defined_tests, :boolean
+  end
+end

db/migrate/20140805161431_add_testing_framework_to_execution_environments.rb

@@ -0,0 +1,5 @@
+class AddTestingFrameworkToExecutionEnvironments < ActiveRecord::Migration
+  def change
+    add_column :execution_environments, :testing_framework, :string
+  end
+end

db/migrate/20140812102114_create_file_types.rb

@@ -0,0 +1,12 @@
+class CreateFileTypes < ActiveRecord::Migration
+  def change
+    create_table :file_types do |t|
+      t.string :editor_mode
+      t.string :file_extension
+      t.integer :indent_size
+      t.string :name
+      t.belongs_to :user
+      t.timestamps
+    end
+  end
+end

db/migrate/20140812144733_create_files.rb

@@ -0,0 +1,14 @@
+class CreateFiles < ActiveRecord::Migration
+  def change
+    create_table :files do |t|
+      t.text :content
+      t.belongs_to :context, polymorphic: true
+      t.belongs_to :file
+      t.belongs_to :file_type
+      t.boolean :hidden
+      t.string :name
+      t.boolean :read_only
+      t.timestamps
+    end
+  end
+end

db/migrate/20140812150607_remove_file_type_related_columns_from_execution_environments.rb

@@ -0,0 +1,7 @@
+class RemoveFileTypeRelatedColumnsFromExecutionEnvironments < ActiveRecord::Migration
+  def change
+    remove_column :execution_environments, :editor_mode, :string
+    remove_column :execution_environments, :file_extension, :string
+    remove_column :execution_environments, :indent_size, :integer
+  end
+end

db/migrate/20140812150925_remove_file_related_columns_from_exercises.rb

@@ -0,0 +1,9 @@
+class RemoveFileRelatedColumnsFromExercises < ActiveRecord::Migration
+  def change
+    remove_column :exercises, :reference_implementation, :text
+    remove_column :exercises, :supports_user_defined_tests, :boolean
+    remove_column :exercises, :template_code, :text
+    remove_column :exercises, :template_test_code, :text
+    remove_column :exercises, :test_code, :text
+  end
+end

db/migrate/20140813091722_remove_code_from_submissions.rb

@@ -0,0 +1,5 @@
+class RemoveCodeFromSubmissions < ActiveRecord::Migration
+  def change
+    remove_column :submissions, :code, :text
+  end
+end

db/migrate/20140820170039_add_instructions_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddInstructionsToExercises < ActiveRecord::Migration
+  def change
+    add_column :exercises, :instructions, :text
+  end
+end

db/migrate/20140821064318_add_published_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddPublishedToExercises < ActiveRecord::Migration
+  def change
+    add_column :exercises, :published, :boolean
+  end
+end

db/migrate/20140823172643_add_executable_to_file_types.rb

@@ -0,0 +1,5 @@
+class AddExecutableToFileTypes < ActiveRecord::Migration
+  def change
+    add_column :file_types, :executable, :boolean
+  end
+end

db/migrate/20140823173923_add_renderable_to_file_types.rb

@@ -0,0 +1,5 @@
+class AddRenderableToFileTypes < ActiveRecord::Migration
+  def change
+    add_column :file_types, :renderable, :boolean
+  end
+end

db/migrate/20140825121336_create_external_users.rb

@@ -0,0 +1,11 @@
+class CreateExternalUsers < ActiveRecord::Migration
+  def change
+    create_table :external_users do |t|
+      t.belongs_to :consumer
+      t.string :email
+      t.string :external_id
+      t.string :name
+      t.timestamps
+    end
+  end
+end

db/migrate/20140825125801_create_internal_users.rb

@@ -0,0 +1,11 @@
+class CreateInternalUsers < ActiveRecord::Migration
+  def change
+    create_table :internal_users do |t|
+      t.belongs_to :consumer
+      t.string :email
+      t.string :name
+      t.string :role
+      t.timestamps
+    end
+  end
+end

db/migrate/20140825154202_drop_users.rb

@@ -0,0 +1,5 @@
+class DropUsers < ActiveRecord::Migration
+  def change
+    drop_table :users
+  end
+end

db/migrate/20140825161350_add_user_type_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddUserTypeToExercises < ActiveRecord::Migration
+  def change
+    add_column :exercises, :user_type, :string
+  end
+end

db/migrate/20140825161358_add_user_type_to_file_types.rb

@@ -0,0 +1,5 @@
+class AddUserTypeToFileTypes < ActiveRecord::Migration
+  def change
+    add_column :file_types, :user_type, :string
+  end
+end

db/migrate/20140825161406_add_user_type_to_submissions.rb

@@ -0,0 +1,5 @@
+class AddUserTypeToSubmissions < ActiveRecord::Migration
+  def change
+    add_column :submissions, :user_type, :string
+  end
+end

db/migrate/20140826073318_sorcery_core.rb

@@ -0,0 +1,8 @@
+class SorceryCore < ActiveRecord::Migration
+  def change
+    InternalUser.delete_all
+    add_column :internal_users, :crypted_password, :string, null: false
+    add_column :internal_users, :salt, :string, null: false
+    add_index :internal_users, :email, unique: true
+  end
+end

db/migrate/20140826073319_sorcery_brute_force_protection.rb

@@ -0,0 +1,7 @@
+class SorceryBruteForceProtection < ActiveRecord::Migration
+  def change
+    add_column :internal_users, :failed_logins_count, :integer, default: 0
+    add_column :internal_users, :lock_expires_at, :datetime, default: nil
+    add_column :internal_users, :unlock_token, :string, default: nil
+  end
+end

db/migrate/20140826073320_sorcery_remember_me.rb

@@ -0,0 +1,7 @@
+class SorceryRememberMe < ActiveRecord::Migration
+  def change
+    add_column :internal_users, :remember_me_token, :string, default: nil
+    add_column :internal_users, :remember_me_token_expires_at, :datetime, default: nil
+    add_index :internal_users, :remember_me_token
+  end
+end

db/migrate/20140826073321_sorcery_reset_password.rb

@@ -0,0 +1,8 @@
+class SorceryResetPassword < ActiveRecord::Migration
+  def change
+    add_column :internal_users, :reset_password_token, :string, default: nil
+    add_column :internal_users, :reset_password_token_expires_at, :datetime, default: nil
+    add_column :internal_users, :reset_password_email_sent_at, :datetime, default: nil
+    add_index :internal_users, :reset_password_token
+  end
+end

db/migrate/20140826073322_sorcery_user_activation.rb

@@ -0,0 +1,8 @@
+class SorceryUserActivation < ActiveRecord::Migration
+  def change
+    add_column :internal_users, :activation_state, :string, default: nil
+    add_column :internal_users, :activation_token, :string, default: nil
+    add_column :internal_users, :activation_token_expires_at, :datetime, default: nil
+    add_index :internal_users, :activation_token
+  end
+end

db/migrate/20140827065359_add_binary_to_file_types.rb

@@ -0,0 +1,5 @@
+class AddBinaryToFileTypes < ActiveRecord::Migration
+  def change
+    add_column :file_types, :binary, :boolean
+  end
+end

db/migrate/20140827083957_add_native_file_to_files.rb

@@ -0,0 +1,5 @@
+class AddNativeFileToFiles < ActiveRecord::Migration
+  def change
+    add_column :files, :native_file, :string
+  end
+end

db/migrate/20140829141913_create_hints.rb

@@ -0,0 +1,12 @@
+class CreateHints < ActiveRecord::Migration
+  def change
+    create_table :hints do |t|
+      t.belongs_to :execution_environment
+      t.string :locale
+      t.text :message
+      t.string :name
+      t.string :regular_expression
+      t.timestamps
+    end
+  end
+end

db/migrate/20140903093436_remove_not_null_constraints_from_internal_users.rb

@@ -0,0 +1,6 @@
+class RemoveNotNullConstraintsFromInternalUsers < ActiveRecord::Migration
+  def change
+    change_column_null(:internal_users, :crypted_password, true)
+    change_column_null(:internal_users, :salt, true)
+  end
+end

db/migrate/20140903165113_create_errors.rb

@@ -0,0 +1,9 @@
+class CreateErrors < ActiveRecord::Migration
+  def change
+    create_table :errors do |t|
+      t.belongs_to :execution_environment
+      t.text :message
+      t.timestamps
+    end
+  end
+end

db/migrate/20140904082810_add_token_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddTokenToExercises < ActiveRecord::Migration
+  def change
+    add_column :exercises, :token, :string
+  end
+end

db/migrate/20140909115430_add_file_id_to_exercises.rb

@@ -0,0 +1,5 @@
+class AddFileIdToExercises < ActiveRecord::Migration
+  def change
+    add_reference :exercises, :file
+  end
+end

db/migrate/20140915095420_add_role_to_files.rb

@@ -0,0 +1,5 @@
+class AddRoleToFiles < ActiveRecord::Migration
+  def change
+    add_column :files, :role, :string
+  end
+end

db/migrate/20140915122846_remove_file_id_from_exercises.rb

@@ -0,0 +1,5 @@
+class RemoveFileIdFromExercises < ActiveRecord::Migration
+  def change
+    remove_reference :exercises, :file
+  end
+end

db/migrate/20140918063522_add_hashed_content_to_files.rb

@@ -0,0 +1,11 @@
+class AddHashedContentToFiles < ActiveRecord::Migration
+  def change
+    add_column :files, :hashed_content, :string
+
+    reversible do |direction|
+      direction.up do
+        CodeOcean::File.all.each(&:save)
+      end
+    end
+  end
+end

db/migrate/20140922161120_add_feedback_message_to_files.rb

@@ -0,0 +1,5 @@
+class AddFeedbackMessageToFiles < ActiveRecord::Migration
+  def change
+    add_column :files, :feedback_message, :string
+  end
+end

db/migrate/20140922161226_add_weight_to_files.rb

@@ -0,0 +1,5 @@
+class AddWeightToFiles < ActiveRecord::Migration
+  def change
+    add_column :files, :weight, :float
+  end
+end

db/migrate/20141003072729_add_help_to_execution_environments.rb

@@ -0,0 +1,5 @@
+class AddHelpToExecutionEnvironments < ActiveRecord::Migration
+  def change
+    add_column :execution_environments, :help, :text
+  end
+end

db/migrate/20141004114747_add_exposed_ports_to_execution_environments.rb

@@ -0,0 +1,5 @@
+class AddExposedPortsToExecutionEnvironments < ActiveRecord::Migration
+  def change
+    add_column :execution_environments, :exposed_ports, :string
+  end
+end

db/migrate/20141009110434_add_permitted_execution_time_to_execution_environments.rb

@@ -0,0 +1,5 @@
+class AddPermittedExecutionTimeToExecutionEnvironments < ActiveRecord::Migration
+  def change
+    add_column :execution_environments, :permitted_execution_time, :integer
+  end
+end

db/migrate/20141011145303_add_user_id_and_user_type_to_execution_environments.rb

@@ -0,0 +1,6 @@
+class AddUserIdAndUserTypeToExecutionEnvironments < ActiveRecord::Migration
+  def change
+    add_reference :execution_environments, :user
+    add_column :execution_environments, :user_type, :string
+  end
+end

db/migrate/20141017110211_rename_published_to_public.rb

@@ -0,0 +1,5 @@
+class RenamePublishedToPublic < ActiveRecord::Migration
+  def change
+    rename_column :exercises, :published, :public
+  end
+end

db/migrate/20141031161603_add_path_to_files.rb

@@ -0,0 +1,5 @@
+class AddPathToFiles < ActiveRecord::Migration
+  def change
+    add_column :files, :path, :string
+  end
+end

db/schema.rb

@@ -0,0 +1,151 @@
+# encoding: UTF-8
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20141031161603) do
+
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
+
+  create_table "consumers", force: true do |t|
+    t.string   "name"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.string   "oauth_key"
+    t.string   "oauth_secret"
+  end
+
+  create_table "errors", force: true do |t|
+    t.integer  "execution_environment_id"
+    t.text     "message"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  create_table "execution_environments", force: true do |t|
+    t.string   "docker_image"
+    t.string   "name"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.string   "run_command"
+    t.string   "test_command"
+    t.string   "testing_framework"
+    t.text     "help"
+    t.string   "exposed_ports"
+    t.integer  "permitted_execution_time"
+    t.integer  "user_id"
+    t.string   "user_type"
+  end
+
+  create_table "exercises", force: true do |t|
+    t.text     "description"
+    t.integer  "execution_environment_id"
+    t.string   "title"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.integer  "user_id"
+    t.text     "instructions"
+    t.boolean  "public"
+    t.string   "user_type"
+    t.string   "token"
+  end
+
+  create_table "external_users", force: true do |t|
+    t.integer  "consumer_id"
+    t.string   "email"
+    t.string   "external_id"
+    t.string   "name"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  create_table "file_types", force: true do |t|
+    t.string   "editor_mode"
+    t.string   "file_extension"
+    t.integer  "indent_size"
+    t.string   "name"
+    t.integer  "user_id"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.boolean  "executable"
+    t.boolean  "renderable"
+    t.string   "user_type"
+    t.boolean  "binary"
+  end
+
+  create_table "files", force: true do |t|
+    t.text     "content"
+    t.integer  "context_id"
+    t.string   "context_type"
+    t.integer  "file_id"
+    t.integer  "file_type_id"
+    t.boolean  "hidden"
+    t.string   "name"
+    t.boolean  "read_only"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.string   "native_file"
+    t.string   "role"
+    t.string   "hashed_content"
+    t.string   "feedback_message"
+    t.float    "weight"
+    t.string   "path"
+  end
+
+  create_table "hints", force: true do |t|
+    t.integer  "execution_environment_id"
+    t.string   "locale"
+    t.text     "message"
+    t.string   "name"
+    t.string   "regular_expression"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  create_table "internal_users", force: true do |t|
+    t.integer  "consumer_id"
+    t.string   "email"
+    t.string   "name"
+    t.string   "role"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.string   "crypted_password"
+    t.string   "salt"
+    t.integer  "failed_logins_count",             default: 0
+    t.datetime "lock_expires_at"
+    t.string   "unlock_token"
+    t.string   "remember_me_token"
+    t.datetime "remember_me_token_expires_at"
+    t.string   "reset_password_token"
+    t.datetime "reset_password_token_expires_at"
+    t.datetime "reset_password_email_sent_at"
+    t.string   "activation_state"
+    t.string   "activation_token"
+    t.datetime "activation_token_expires_at"
+  end
+
+  add_index "internal_users", ["activation_token"], name: "index_internal_users_on_activation_token", using: :btree
+  add_index "internal_users", ["email"], name: "index_internal_users_on_email", unique: true, using: :btree
+  add_index "internal_users", ["remember_me_token"], name: "index_internal_users_on_remember_me_token", using: :btree
+  add_index "internal_users", ["reset_password_token"], name: "index_internal_users_on_reset_password_token", using: :btree
+
+  create_table "submissions", force: true do |t|
+    t.integer  "exercise_id"
+    t.float    "score"
+    t.integer  "user_id"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.string   "cause"
+    t.string   "user_type"
+  end
+
+end

db/seeds.rb

@@ -0,0 +1,25 @@
+def find_factories_by_class(klass)
+  FactoryGirl.factories.select do |factory|
+    factory.instance_variable_get(:@class_name) == klass || factory.instance_variable_get(:@name) == klass.model_name.singular.to_sym
+  end
+end
+
+class ActiveRecord::Base
+  [:build, :create].each do |strategy|
+    define_singleton_method("#{strategy}_factories") do |attributes = {}|
+      find_factories_by_class(self).map(&:name).map do |factory_name|
+        FactoryGirl.send(strategy, factory_name, attributes)
+      end
+    end
+  end
+end
+
+# delete all present records
+Rails.application.eager_load!
+(ActiveRecord::Base.descendants - [ActiveRecord::SchemaMigration]).each(&:delete_all)
+
+# delete file uploads
+FileUtils.rm_rf(Rails.root.join('public', 'uploads'))
+
+# load environment-dependent seeds
+load(Rails.root.join('db', 'seeds', "#{Rails.env}.rb"))

db/seeds/audio_video/index.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
+    <script src="index.js"></script>
+  </head>
+  <body>
+    <h1>HTML5 Audio & Video</h1>
+  </body>
+</html>

db/seeds/audio_video/index.html_spec.rb

@@ -0,0 +1,27 @@
+require 'rack/file'
+require 'capybara/rspec'
+
+AUDIO_FILENAME = 'chai.ogg'
+VIDEO_FILENAME = 'devstories.mp4'
+
+Capybara.app = Rack::File.new(File.dirname(__FILE__))
+
+describe 'index.html', type: :feature do
+  before(:each) { visit('index.html') }
+
+  it 'contains an audio element' do
+    expect(page).to have_css('audio')
+  end
+
+  it 'plays the correct audio file' do
+    expect(page).to have_css("audio[src='#{AUDIO_FILENAME}']")
+  end
+
+  it 'contains a video element' do
+    expect(page).to have_css('video')
+  end
+
+  it 'plays the correct video file' do
+    expect(page).to have_css("video[src='#{VIDEO_FILENAME}']")
+  end
+end

db/seeds/audio_video/index.js

@@ -0,0 +1,3 @@
+$(function() {
+  //
+});

db/seeds/development.rb

@@ -0,0 +1,24 @@
+# consumers
+FactoryGirl.create(:consumer)
+FactoryGirl.create(:consumer, name: 'openSAP')
+
+# users
+%w[admin external_user teacher].each { |factory_name| FactoryGirl.create(factory_name) }
+
+# execution environments
+ExecutionEnvironment.create_factories
+
+# errors
+Error.create_factories
+
+# exercises
+@exercises = find_factories_by_class(Exercise).map(&:name).map { |factory_name| [factory_name, FactoryGirl.create(factory_name)] }.to_h
+
+# file types
+FileType.create_factories
+
+# hints
+Hint.create_factories
+
+# submissions
+FactoryGirl.create(:submission, exercise: @exercises[:fibonacci])

db/seeds/even_odd/exercise.py

@@ -0,0 +1,5 @@
+def even(x):
+    pass
+
+def odd(x):
+    pass

db/seeds/even_odd/exercise_tests.py

@@ -0,0 +1,15 @@
+from exercise import *
+import unittest
+
+class ExerciseTests(unittest.TestCase):
+    def test_even(self):
+        for x in [1, 3, 5, 7, 9]:
+            self.assertFalse(even(x))
+        for x in [2, 4, 6, 8, 10]:
+            self.assertTrue(even(x))
+
+    def test_odd(self):
+        for x in [1, 3, 5, 7, 9]:
+            self.assertTrue(odd(x))
+        for x in [2, 4, 6, 8, 10]:
+            self.assertFalse(odd(x))

db/seeds/even_odd/reference.py

@@ -0,0 +1,5 @@
+def even(x):
+    return x % 2 == 0
+
+def odd(x):
+    return not even(x)

db/seeds/fibonacci/exercise.rb

@@ -0,0 +1,2 @@
+def fibonacci(n)
+end

db/seeds/fibonacci/exercise_spec_1.rb

@@ -0,0 +1,15 @@
+require './exercise'
+
+describe '#fibonacci' do
+  it 'is defined' do
+    expect { method(:fibonacci) }.not_to raise_error
+  end
+
+  it 'has the correct arity' do
+    expect(method(:fibonacci).arity).to eq(1)
+  end
+
+  it 'returns a number' do
+    expect(fibonacci(1)).to be_an(Integer)
+  end
+end

db/seeds/fibonacci/exercise_spec_2.rb

@@ -0,0 +1,9 @@
+require './exercise'
+
+describe '#fibonacci' do
+  it 'works recursively' do
+    @n = 16
+    expect(self).to receive(:fibonacci).and_call_original.at_least(@n ** 2).times
+    fibonacci(@n)
+  end
+end

db/seeds/fibonacci/exercise_spec_3.rb

@@ -0,0 +1,16 @@
+require './exercise'
+require './reference'
+
+describe '#fibonacci' do
+  SAMPLE_COUNT = 32
+
+  let(:reference) { Class.new.extend(Reference) }
+
+  SAMPLE_COUNT.times do |i|
+    instance_eval do
+      it "obtains the correct result for input #{i}" do
+        expect(fibonacci(i)).to eq(reference.fibonacci(i))
+      end
+    end
+  end
+end

db/seeds/fibonacci/reference.rb

@@ -0,0 +1,5 @@
+module Reference
+  def fibonacci(n)
+    n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2)
+  end
+end

db/seeds/files/data.txt

@@ -0,0 +1,2 @@
+Foo
+Bar

db/seeds/files/exercise.rb

@@ -0,0 +1,6 @@
+SOURCE_FILENAME = 'data.txt'
+TARGET_FILENAME = 'copy.txt'
+
+def copy_file
+  # Implement this method.
+end

db/seeds/files/exercise_spec.rb

@@ -0,0 +1,21 @@
+require './exercise'
+
+describe '#write_to_file' do
+  before(:each) do
+    @file_content = File.new(SOURCE_FILENAME, 'r').read
+    write_to_file
+  end
+
+  it 'preserves the source file' do
+    expect(File.exist?(SOURCE_FILENAME)).to be true
+    expect(File.new(SOURCE_FILENAME, 'r').read).to eq(@file_content)
+  end
+
+  it 'creates the target file' do
+    expect(File.exist?(TARGET_FILENAME)).to be true
+  end
+
+  it 'copies the file content' do
+    expect(File.new(TARGET_FILENAME, 'r').read).to eq(@file_content)
+  end
+end

db/seeds/geolocation/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
+    <script src="index.js"></script>
+  </head>
+  <body>
+    <h1>HTML5 Geolocation</h1>
+    <button id="locate">Locate me</button>
+  </body>
+</html>

db/seeds/geolocation/index.js

@@ -0,0 +1,3 @@
+$(function() {
+  var button = $('#locate');
+});

db/seeds/hello_world/exercise_spec.rb

@@ -0,0 +1,6 @@
+describe 'Exercise' do
+  it "outputs 'Hello World" do
+    expect(STDOUT).to receive(:puts).with('Hello World')
+    require './exercise'
+  end
+end

db/seeds/math/Makefile

@@ -0,0 +1,7 @@
+run:
+	javac org/example/RecursiveMath.java
+	java org/example/RecursiveMath
+
+test:
+	javac -cp .:/usr/java/lib/hamcrest-core-1.3.jar:/usr/java/lib/junit-4.11.jar org/example/${FILENAME}
+	java -cp .:/usr/java/lib/hamcrest-core-1.3.jar:/usr/java/lib/junit-4.11.jar org.junit.runner.JUnitCore org.example.${CLASS_NAME}

db/seeds/math/org/example/RecursiveMath.java

@@ -0,0 +1,12 @@
+package org.example;
+
+public class RecursiveMath {
+
+    public static void main(String[] args) {
+        //
+    }
+
+    public static double power(int base, int exponent) {
+        return 42;
+    }
+}

db/seeds/math/org/example/RecursiveMathTest1.java

@@ -0,0 +1,26 @@
+package org.example;
+
+import java.lang.Math.*;
+import org.example.RecursiveMath;
+import org.junit.*;
+
+public class RecursiveMathTest1 {
+
+    @Test
+    public void methodIsDefined() {
+        boolean methodIsDefined = false;
+        try {
+             RecursiveMath.power(1, 1);
+             methodIsDefined = true;
+        } catch (NoSuchMethodError error) {
+            //
+        }
+        org.junit.Assert.assertTrue("RecursiveMath does not define 'power'.", methodIsDefined);
+    }
+
+    @Test
+    public void methodReturnsDouble() {
+        Object result = RecursiveMath.power(1, 1);
+        org.junit.Assert.assertTrue("Your method has the wrong return type.", result instanceof Double);
+    }
+}

db/seeds/math/org/example/RecursiveMathTest2.java

@@ -0,0 +1,23 @@
+package org.example;
+
+import java.lang.Math.*;
+import org.example.RecursiveMath;
+import org.junit.*;
+
+public class RecursiveMathTest2 {
+
+    @Test
+    public void exponentZero() {
+        org.junit.Assert.assertEquals("Incorrect result for exponent 0.", 1, RecursiveMath.power(42, 0), 0);
+    }
+
+    @Test
+    public void negativeExponent() {
+        org.junit.Assert.assertEquals("Incorrect result for exponent -1.", Math.pow(2, -1), RecursiveMath.power(2, -1), 0);
+    }
+
+    @Test
+    public void positiveExponent() {
+        org.junit.Assert.assertEquals("Incorrect result for exponent 4.", Math.pow(2, 4), RecursiveMath.power(2, 4), 0);
+    }
+}

db/seeds/primes/exercise.js

@@ -0,0 +1,9 @@
+var isPrime = function(number) {
+    return true;
+};
+
+var printPrimes = function(count) {
+
+};
+
+printPrimes();

db/seeds/production.rb

@@ -0,0 +1,37 @@
+require 'highline/import'
+
+# consumers
+FactoryGirl.create(:consumer)
+
+# users
+email = ask('Enter admin email: ')
+
+passwords = ['password', 'password confirmation'].map do |attribute|
+  ask("Enter admin #{attribute}: ") { |question| question.echo = false }
+end
+
+if passwords.uniq.length == 1
+  FactoryGirl.create(:admin, email: email, name: 'Administrator', password: passwords.first)
+else
+  abort('Passwords do not match!')
+end
+
+# execution environments
+ExecutionEnvironment.create_factories
+
+# exercises
+Exercise.create_factories
+
+# file types
+FileType.create_factories
+
+# hints
+Hint.create_factories
+
+# change all resources' author
+[ExecutionEnvironment, Exercise, FileType].each do |model|
+  model.update_all(user_id: InternalUser.first.id)
+end
+
+# delete temporary users
+InternalUser.where.not(id: InternalUser.first.id).delete_all

db/seeds/sql_select/comparator.rb

@@ -0,0 +1,12 @@
+require 'sqlite3'
+
+REFERENCE_QUERY = File.new('reference.sql', 'r').read
+STUDENT_QUERY = File.new('exercise.sql', 'r').read
+
+database = SQLite3::Database.new('/database.db')
+
+missing_tuples = database.execute(REFERENCE_QUERY) - database.execute(STUDENT_QUERY)
+unexpected_tuples = database.execute(STUDENT_QUERY) - database.execute(REFERENCE_QUERY)
+
+puts("Missing tuples: #{missing_tuples}")
+puts("Unexpected tuples: #{unexpected_tuples}")

db/seeds/sql_select/reference.sql

@@ -0,0 +1 @@
+SELECT * FROM people WHERE name LIKE '% Doe';

db/seeds/tdd/exercise_spec.rb

@@ -0,0 +1,5 @@
+describe 'Exercise' do
+  it 'includes a successful example' do
+    expect(true).to be true
+  end
+end

db/seeds/tdd/instructions.md

@@ -0,0 +1,11 @@
+Write a method `palindrome?` that outputs whether a given input is a palindromic word.
+
+Write tests to verify that your method works correctly for normal words, empty inputs, and malformed inputs.
+
+#### Expected Behavior:
+
+`palindrome?('noon') => true`
+
+`palindrome?('hello') => false`
+
+`palindrome?(42) => false`

db/seeds/web_app/app.rb

@@ -0,0 +1,7 @@
+require 'sinatra'
+
+set :bind, '0.0.0.0'
+
+get '/' do
+  'Hello, World!'
+end