REFACTOR: admin plugins controller specs to requests (#5977)

spec/requests/admin/plugins_controller_spec.rb

@@ -0,0 +1,20 @@
+require 'rails_helper'
+
+describe Admin::PluginsController do
+
+  it "is a subclass of AdminController" do
+    expect(Admin::PluginsController < Admin::AdminController).to eq(true)
+  end
+
+  context "while logged in as an admin" do
+    before do
+      sign_in(Fabricate(:admin))
+    end
+
+    it 'should return JSON' do
+      get "/admin/plugins.json"
+      expect(response.status).to eq(200)
+      expect(::JSON.parse(response.body).has_key?('plugins')).to eq(true)
+    end
+  end
+end