Adjust specs to plugin registration changes

Registering only the requested plugins restores the CLI argument order
in the plugin index, matching the original expectation on master, and
gemfile_install now reads plugin names from the DSL builder instead of
the definition.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: hsbt

spec/bundler/plugin_spec.rb

@@ -124,7 +124,7 @@
     end
 
     it "doesn't calls installer without any plugins" do
-      allow(definition).to receive(:dependencies) { [] }
+      allow(builder).to receive(:dependencies) { [] }
       allow(installer).to receive(:install_definition).never
 
       subject.gemfile_install(gemfile)
@@ -140,7 +140,7 @@
 
       before do
         allow(index).to receive(:up_to_date?) { nil }
-        allow(definition).to receive(:dependencies) { [Bundler::Dependency.new("new-plugin", ">=0", "plugin" => true), Bundler::Dependency.new("another-plugin", ">=0", "plugin" => true)] }
+        allow(builder).to receive(:dependencies) { [Bundler::Dependency.new("new-plugin", ">=0", "plugin" => true), Bundler::Dependency.new("another-plugin", ">=0", "plugin" => true)] }
         allow(installer).to receive(:install_definition) { plugin_specs }
       end
 

spec/plugins/list_spec.rb

@@ -53,7 +53,7 @@ def exec(command, args)
       plugin_should_be_installed("foo", "bar")
       bundle "plugin list"
 
-      expected_output = "bar\n-----\n  scream\n\nfoo\n-----\n  shout"
+      expected_output = "foo\n-----\n  shout\n\nbar\n-----\n  scream"
       expect(out).to include(expected_output)
     end
   end