Do not store rake tasks in lib/tasks.

This path is auto-loaded by Rails for all the gems in the app. This is
not the wanted behaviour here, as these tasks are only to test webpacker-react

Fixes #33

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Fixed
+- Move test Rake tasks out of `lib/tasks` (fixes #33)
+
 ## [0.3.0] - 2017-05-27
 
 ### Added

Rakefile

@@ -1,5 +1,6 @@
 require "bundler/gem_tasks"
 require "rake/testtask"
+require "English"
 
 Rake::TestTask.new(:test) do |t|
   t.libs << "test"
@@ -10,4 +11,24 @@ end
 
 task default: :test
 
-Dir["lib/tasks/*.rake"].each { |f| load f }
+# webpacker:check_webpack_binstubs is looking for binstubs
+# in the gem root directory. We need to disable it for our
+# tests, as it tries to check they exist when loading the
+# example app
+
+task "webpacker:check_webpack_binstubs"
+Rake::Task["webpacker:check_webpack_binstubs"].clear
+
+namespace :example_app do
+  desc "Runs yarn in test/example_app"
+  task :yarn do
+    sh "cd test/example_app && yarn"
+  end
+
+  desc "Runs webpack in test/example_app"
+  task webpack: :yarn do
+    sh "cd test/example_app && NODE_ENV=test ./bin/webpack"
+  end
+end
+
+Rake::Task["test"].enhance ["example_app:webpack"]