Support configuring the version for test plugins.

test/unit/support/shared/base_context.rb

@@ -18,6 +18,7 @@ shared_context "unit" do
     # Unregister each of the plugins we have may have temporarily
     # registered for the duration of this test.
     @_plugins.each do |plugin|
+      Vagrant.plugin("1").manager.unregister(plugin)
       Vagrant.plugin("2").manager.unregister(plugin)
     end
   end
@@ -40,8 +41,9 @@ shared_context "unit" do
   #
   # @yield [plugin] Yields the plugin class for you to call the public
   #   API that you need to.
-  def register_plugin
-    plugin = Class.new(Vagrant.plugin("2"))
+  def register_plugin(version=nil)
+    version ||= Vagrant::Config::CURRENT_VERSION
+    plugin = Class.new(Vagrant.plugin(version))
     plugin.name("Test Plugin #{plugin.inspect}")
     yield plugin if block_given?
     @_plugins << plugin

test/unit/vagrant/config/v1/loader_test.rb

@@ -21,7 +21,7 @@ describe Vagrant::Config::V1::Loader do
       stub_const("Vagrant::Config::CURRENT_VERSION", "1")
 
       # Register some config classes.
-      register_plugin do |p|
+      register_plugin("1") do |p|
         p.config("foo") { OpenStruct }
         p.config("bar", true) { OpenStruct }
       end
@@ -37,7 +37,7 @@ describe Vagrant::Config::V1::Loader do
       stub_const("Vagrant::Config::CURRENT_VERSION", "2")
 
       # Register some config classes.
-      register_plugin do |p|
+      register_plugin("1") do |p|
         p.config("foo") { OpenStruct }
         p.config("bar", true) { OpenStruct }
       end
@@ -52,7 +52,7 @@ describe Vagrant::Config::V1::Loader do
   describe "finalizing" do
     it "should call `#finalize` on the configuration object" do
       # Register a plugin for our test
-      register_plugin do |plugin|
+      register_plugin("1") do |plugin|
         plugin.config "foo" do
           Class.new do
             attr_accessor :bar
@@ -82,7 +82,7 @@ describe Vagrant::Config::V1::Loader do
   describe "loading" do
     it "should configure with all plugin config keys loaded" do
       # Register a plugin for our test
-      register_plugin do |plugin|
+      register_plugin("1") do |plugin|
         plugin.config("foo") { OpenStruct }
       end