Intelligent OmniAuth strategy loader

test/omniauth/config_test.rb

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+require 'test_helper'
+
+class OmniAuthConfigTest < ActiveSupport::TestCase
+  def self.context(name, &block)
+    instance_eval(&block)
+  end
+
+  setup do
+    $: << File.dirname(__FILE__)
+  end
+
+  context 'Devise::OmniAuth::Config#strategy_name' do
+    test 'returns provider if no options given' do
+      config = Devise::OmniAuth::Config.new :facebook, [{}]
+      assert_equal :facebook, config.strategy_name
+    end
+    test 'returns provider if no name option given' do
+      config = Devise::OmniAuth::Config.new :facebook, [{ :other => :option }]
+      assert_equal :facebook, config.strategy_name
+    end
+    test 'returns name option' do
+      config = Devise::OmniAuth::Config.new :facebook, [{ :name => :github }]
+      assert_equal :github, config.strategy_name
+    end
+  end
+
+  context 'Devise::OmniAuth::Config#strategy_class' do
+    test "finds contrib strategies" do
+      config = Devise::OmniAuth::Config.new :facebook, [{}]
+      assert_equal OmniAuth::Strategies::Facebook, config.strategy_class
+    end
+    test "finds the strategy in OmniAuth's list by name" do
+      NamedTestStrategy = Class.new
+      NamedTestStrategy.send :include, OmniAuth::Strategy
+      NamedTestStrategy.option :name, :the_one
+
+      config = Devise::OmniAuth::Config.new :the_one, [{}]
+      assert_equal NamedTestStrategy, config.strategy_class
+    end
+    test "finds the strategy in OmniAuth's list by class name" do
+      UnNamedTestStrategy = Class.new
+      UnNamedTestStrategy.send :include, OmniAuth::Strategy
+
+      config = Devise::OmniAuth::Config.new :un_named_test_strategy, [{}]
+      assert_equal UnNamedTestStrategy, config.strategy_class
+    end
+    test 'attempts to load an as-yet not loaded plugin' do
+      config = Devise::OmniAuth::Config.new :my_strategy, [{}]
+      config_class = config.strategy_class
+      assert_equal MyStrategy, config_class
+    end
+    test 'allows the user to define a custom require path' do
+      config = Devise::OmniAuth::Config.new :my_other_strategy, [{:require => 'my_other_strategy'}]
+      config_class = config.strategy_class
+      assert_equal MyOtherStrategy, config_class
+    end
+  end
+end

test/omniauth/my_other_strategy.rb

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+require 'omniauth'
+
+class MyOtherStrategy
+  include OmniAuth::Strategy
+end

test/omniauth/omniauth-my_strategy.rb

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+require 'omniauth'
+
+class MyStrategy
+  include OmniAuth::Strategy
+end