extract database_cleaner-mongo adapter.

Gemfile

@@ -4,4 +4,5 @@ path "./adapters" do
   gem "database_cleaner-active_record"
   gem "database_cleaner-couch_potato"
   gem "database_cleaner-data_mapper"
+  gem "database_cleaner-mongo"
 end

Gemfile.lock

@@ -15,6 +15,9 @@ PATH
     database_cleaner-data_mapper (1.8.0)
       database_cleaner (~> 1.8.0)
       datamapper
+    database_cleaner-mongo (1.8.0)
+      database_cleaner (~> 1.8.0)
+      mongo
 
 GEM
   remote: https://rubygems.org/
@@ -263,6 +266,7 @@ DEPENDENCIES
   database_cleaner-active_record!
   database_cleaner-couch_potato!
   database_cleaner-data_mapper!
+  database_cleaner-mongo!
   datamapper
   dm-migrations
   dm-sqlite-adapter

adapters/database_cleaner-mongo/.gitignore

@@ -0,0 +1,11 @@
+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+
+# rspec failure tracking
+.rspec_status

adapters/database_cleaner-mongo/.rspec

@@ -0,0 +1,3 @@
+--format documentation
+--color
+--require spec_helper

adapters/database_cleaner-mongo/.travis.yml

@@ -0,0 +1,5 @@
+sudo: false
+language: ruby
+rvm:
+  - 2.2.9
+before_install: gem install bundler -v 1.16.1

adapters/database_cleaner-mongo/Gemfile

@@ -0,0 +1,8 @@
+source "https://rubygems.org"
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+# Specify your gem's dependencies in database_cleaner-mongo.gemspec
+gemspec
+
+gem "database_cleaner", path: "../.."

adapters/database_cleaner-mongo/Gemfile.lock

@@ -0,0 +1,46 @@
+PATH
+  remote: ../..
+  specs:
+    database_cleaner (1.8.0)
+
+PATH
+  remote: .
+  specs:
+    database_cleaner-mongo (1.8.0)
+      database_cleaner (~> 1.8.0)
+      mongo
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    bson (1.12.5)
+    diff-lcs (1.3)
+    mongo (1.12.5)
+      bson (= 1.12.5)
+    rake (10.4.2)
+    rspec (3.7.0)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+    rspec-core (3.7.1)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  bundler (~> 1.16)
+  database_cleaner!
+  database_cleaner-mongo!
+  rake (~> 10.0)
+  rspec (~> 3.0)
+
+BUNDLED WITH
+   1.16.1

adapters/database_cleaner-mongo/LICENSE.txt

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2009 Ben Mabey
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

adapters/database_cleaner-mongo/README.md

@@ -0,0 +1,39 @@
+# DatabaseCleaner::Mongo
+
+Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/database_cleaner/mongo`. To experiment with that code, run `bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'database_cleaner-mongo'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install database_cleaner-mongo
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/database_cleaner-mongo.
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

adapters/database_cleaner-mongo/Rakefile

@@ -0,0 +1,6 @@
+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+task :default => :spec

adapters/database_cleaner-mongo/bin/console

@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "database_cleaner/mongo"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start(__FILE__)

adapters/database_cleaner-mongo/bin/setup

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here

adapters/database_cleaner-mongo/database_cleaner-mongo.gemspec

@@ -0,0 +1,30 @@
+
+lib = File.expand_path("../lib", __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require "database_cleaner/mongo/version"
+
+Gem::Specification.new do |spec|
+  spec.name          = "database_cleaner-mongo"
+  spec.version       = DatabaseCleaner::Mongo::VERSION
+  spec.authors       = ["Ernesto Tagwerker"]
+  spec.email         = ["ernesto@ombulabs.com"]
+
+  spec.summary       = "Strategies for cleaning databases using Mongo. Can be used to ensure a clean state for testing."
+  spec.description   = "Strategies for cleaning databases using Mongo. Can be used to ensure a clean state for testing."
+  spec.homepage      = "https://github.com/DatabaseCleaner/database_cleaner-mongo"
+  spec.license       = "MIT"
+
+  spec.files         = `git ls-files -z`.split("\x0").reject do |f|
+    f.match(%r{^(test|spec|features)/})
+  end
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "database_cleaner", "~> 1.8.0"
+  spec.add_dependency "mongo"
+
+  spec.add_development_dependency "bundler", "~> 1.16"
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rspec", "~> 3.0"
+end

adapters/database_cleaner-mongo/lib/database_cleaner-mongo.rb

@@ -0,0 +1 @@
+require "database_cleaner/mongo"

adapters/database_cleaner-mongo/lib/database_cleaner/mongo.rb

@@ -0,0 +1,3 @@
+require 'database_cleaner/mongo/version'
+require 'database_cleaner'
+require 'database_cleaner/mongo/truncation'

adapters/database_cleaner-mongo/lib/database_cleaner/mongo/base.rb

@@ -0,0 +1,16 @@
+module DatabaseCleaner
+  module Mongo
+    def self.available_strategies
+      %w[truncation]
+    end
+    module Base
+      def db=(desired_db)
+        @db = desired_db
+      end
+
+      def db
+        @db || raise("You have not specified a database.  (see Mongo::Database)")
+      end
+    end
+  end
+end

adapters/database_cleaner-mongo/lib/database_cleaner/mongo/truncation.rb

@@ -0,0 +1,62 @@
+require 'database_cleaner/mongo/base'
+require 'database_cleaner/generic/truncation'
+require 'database_cleaner/mongo/truncation_mixin'
+module DatabaseCleaner
+  module Mongo
+    class Truncation
+      include ::DatabaseCleaner::Generic::Truncation
+      include TruncationMixin
+      include Base
+      private
+
+      def database
+        db
+      end
+
+      def collections_cache
+        @@collections_cache ||= {}
+      end
+
+      def mongoid_collection_names
+        @@mongoid_collection_names ||= Hash.new{|h,k| h[k]=[]}.tap do |names|
+          ObjectSpace.each_object(Class) do |klass|
+            (names[klass.db.name] << klass.collection_name) if valid_collection_name?(klass)
+          end
+        end
+      end
+
+      def not_caching(db_name, list)
+        @@not_caching ||= {}
+
+        unless @@not_caching.has_key?(db_name)
+          @@not_caching[db_name] = true
+
+          puts "Not caching collection names for db #{db_name}. Missing these from models: #{list}"
+        end
+      end
+
+      def collections
+        return collections_cache[database.name] if collections_cache.has_key?(database.name)
+        db_collections = database.collections.select { |c| c.name !~ /^system\./ }
+
+        missing_collections = mongoid_collection_names[database.name] - db_collections.map(&:name)
+
+        if missing_collections.empty?
+          collections_cache[database.name] = db_collections
+        else
+          not_caching(database.name, missing_collections)
+        end
+
+        db_collections
+      end
+
+      private
+
+      def valid_collection_name?(klass)
+        klass.ancestors.map(&:to_s).include?('Mongoid::Document') &&
+        !klass.embedded &&
+        !klass.collection_name.empty?
+      end
+    end
+  end
+end

adapters/database_cleaner-mongo/lib/database_cleaner/mongo/truncation_mixin.rb

@@ -0,0 +1,26 @@
+module DatabaseCleaner
+  module Mongo
+    module TruncationMixin
+
+      def clean
+        if @only
+          collections.each { |c| c.send(truncate_method_name) if @only.include?(c.name) }
+        else
+          collections.each { |c| c.send(truncate_method_name) unless @tables_to_exclude.include?(c.name) }
+        end
+        true
+      end
+
+      private
+
+      def collections
+        database.collections.select { |c| c.name !~ /^system\./ }
+      end
+
+      def truncate_method_name
+        # This constant only exists in the 2.x series.
+        defined?(::Mongo::VERSION) ? :delete_many : :remove
+      end
+    end
+  end
+end

adapters/database_cleaner-mongo/lib/database_cleaner/mongo/version.rb

@@ -0,0 +1,5 @@
+module DatabaseCleaner
+  module Mongo
+    VERSION = "1.8.0"
+  end
+end

adapters/database_cleaner-mongo/spec/database_cleaner/mongo/mongo_examples.rb

@@ -0,0 +1,26 @@
+module MongoTest
+  class Base
+    def self.collection
+      @connection ||= Mongo::Connection.new('127.0.0.1')
+      @db ||= @connection.db('database_cleaner_specs')
+      @collection ||= @db.collection(name) || @db.create_collection(name)
+    end
+
+    def self.count
+      @collection.count
+    end
+
+    def initialize(attrs={})
+      @attrs = attrs
+    end
+
+    def save!
+      self.class.collection.insert(@attrs)
+    end
+  end
+
+  class Widget < Base
+  end
+  class Gadget < Base
+  end
+end

adapters/database_cleaner-mongo/spec/database_cleaner/mongo/truncation_spec.rb

@@ -0,0 +1,50 @@
+require 'mongo'
+require 'database_cleaner/mongo/truncation'
+require File.dirname(__FILE__) + '/mongo_examples'
+
+RSpec.describe DatabaseCleaner::Mongo::Truncation do
+  around do |example|
+    connection = Mongo::Connection.new('127.0.0.1')
+    db_name = 'database_cleaner_specs'
+    db = connection.db(db_name)
+    subject.db = db
+
+    example.run
+
+    connection.drop_database(db_name)
+  end
+
+  before do
+    MongoTest::Widget.new(name: 'some widget').save!
+    MongoTest::Gadget.new(name: 'some gadget').save!
+  end
+
+  context "by default" do
+    it "truncates all collections" do
+      expect { subject.clean }.to change {
+        [MongoTest::Widget.count, MongoTest::Gadget.count]
+      }.from([1,1]).to([0,0])
+    end
+  end
+
+  context "when collections are provided to the :only option" do
+    subject { described_class.new(only: ['MongoTest::Widget']) }
+
+    it "only truncates the specified collections" do
+      expect { subject.clean }.to change {
+        [MongoTest::Widget.count, MongoTest::Gadget.count]
+      }.from([1,1]).to([0,1])
+    end
+  end
+
+  context "when collections are provided to the :except option" do
+    subject { described_class.new(except: ['MongoTest::Widget']) }
+
+    it "truncates all but the specified collections" do
+      expect { subject.clean }.to change {
+        [MongoTest::Widget.count, MongoTest::Gadget.count]
+      }.from([1,1]).to([1,0])
+    end
+  end
+end
+

adapters/database_cleaner-mongo/spec/spec_helper.rb

@@ -0,0 +1,14 @@
+require "bundler/setup"
+require "database_cleaner/mongo"
+
+RSpec.configure do |config|
+  # Enable flags like --only-failures and --next-failure
+  config.example_status_persistence_file_path = ".rspec_status"
+
+  # Disable RSpec exposing methods globally on `Module` and `main`
+  config.disable_monkey_patching!
+
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+end