Simplify rake test vs rake test:all

Renames `rake test:all` to `rake test` by changing old `rake test:run` to previous version of `rake test:all`.  Removes old definition of `rake test`. Also renames `rake test:all:db` to `rake test:db` and deprecates `rake test:all` & `rake test:all:db`

guides/source/testing.md

@@ -792,7 +792,7 @@ when you initiate a Rails project.
 
 | Tasks                   | Description |
 | ----------------------- | ----------- |
-| `rake test`             | Runs all unit, functional and integration tests. You can also simply run `rake` as Rails will run all the tests by default |
+| `rake test`             | Runs all tests in the test folder. You can also simply run `rake` as Rails will run all the tests by default |
 | `rake test:controllers` | Runs all the controller tests from `test/controllers` |
 | `rake test:functionals` | Runs all the functional tests from `test/controllers`, `test/mailers`, and `test/functional` |
 | `rake test:helpers`     | Runs all the helper tests from `test/helpers` |
@@ -801,8 +801,7 @@ when you initiate a Rails project.
 | `rake test:mailers`     | Runs all the mailer tests from `test/mailers` |
 | `rake test:models`      | Runs all the model tests from `test/models` |
 | `rake test:units`       | Runs all the unit tests from `test/models`, `test/helpers`, and `test/unit` |
-| `rake test:all`         | Runs all tests quickly by merging all types and not resetting db |
-| `rake test:all:db`      | Runs all tests quickly by merging all types and resetting db |
+| `rake test:db`          | Runs all tests and resets the db |
 
 
 Brief Note About `Minitest`

railties/CHANGELOG.md

@@ -181,4 +181,10 @@
 
     *Yves Senn*, *Carlos Antonio da Silva*, *Robin Dupret*
 
+*   Make `rake test` run all tests in test folder.
+
+    Deprecate `rake test:all` and replace `rake test:all:db` with `rake test:db`
+
+    *David Geukers*
+
 Please check [4-1-stable](https://github.com/rails/rails/blob/4-1-stable/railties/CHANGELOG.md) for previous changes.

railties/lib/rails/test_unit/testing.rake

@@ -3,7 +3,7 @@ require 'rails/test_unit/sub_test_task'
 
 task default: :test
 
-desc 'Runs test:units, test:functionals, test:generators, test:integration, test:jobs together'
+desc "Runs all tests in test folder"
 task :test do
   Rails::TestTask.test_creator(Rake.application.top_level_tasks).invoke_rake_task
 end
@@ -13,17 +13,34 @@ namespace :test do
     # Placeholder task for other Railtie and plugins to enhance. See Active Record for an example.
   end
 
-  task :run => ['test:units', 'test:functionals', 'test:generators', 'test:integration', 'test:jobs']
+  Rails::TestTask.new(:run) do |t|
+    t.pattern = "test/**/*_test.rb"
+  end
+
+  desc "Run tests quickly, but also reset db"
+  task :db => %w[db:test:prepare test]
 
-  # Inspired by: http://ngauthier.com/2012/02/quick-tests-with-bash.html
   desc "Run tests quickly by merging all types and not resetting db"
   Rails::TestTask.new(:all) do |t|
     t.pattern = "test/**/*_test.rb"
   end
 
+  Rake::Task["test:all"].enhance do
+    Rake::Task["test:deprecate_all"].invoke
+  end
+
+  task :deprecate_all do
+    ActiveSupport::Deprecation.warn "rake test:all is deprecated and will be removed in Rails 5. " \
+    "Use rake test to run all tests in test directory."
+  end
+
   namespace :all do
     desc "Run tests quickly, but also reset db"
     task :db => %w[db:test:prepare test:all]
+
+    Rake::Task["test:all:db"].enhance do
+      Rake::Task["test:deprecate_all"].invoke
+    end
   end
 
   Rails::TestTask.new(single: "test:prepare")