add tests for user promotion/demotion admin interface

test/functional/admin/users_controller_test.rb

@@ -1,8 +1,50 @@
 require 'test_helper'
 
 class Admin::UsersControllerTest < ActionController::TestCase
-  # Replace this with your real tests.
-  test "the truth" do
-    assert true
+  context "Admin::UsersController" do
+    setup do
+      @mod = FactoryGirl.create(:moderator_user)
+      CurrentUser.user = @mod
+      CurrentUser.ip_addr = "127.0.0.1"
+      @user = FactoryGirl.create(:user)
+      @admin = FactoryGirl.create(:admin_user)
+    end
+
+    context "#edit" do
+      should "render" do
+        get :edit, {:id => @user.id}
+        assert_response :success
+      end
+    end
+
+    context "#update" do
+      context "on a basic user" do
+        should "succeed" do
+          put :update, {:id => @user.id, :user => {:level => "30"}}
+          assert_redirected_to(edit_admin_user_path(@user))
+          @user.reload
+          assert_equal(30, @user.level)
+          assert_equal(@mod.id, @user.inviter_id)
+        end
+
+        context "promoted to an admin" do
+          should "fail" do
+            put :update, {:id => @user.id, :user => {:level => "50"}}
+            assert_redirected_to(new_session_path)
+            @user.reload
+            assert_equal(20, @user.level)
+          end
+        end
+      end
+
+      context "on an admin user" do
+        should "fail" do
+          put :update, {:id => @admin.id, :user => {:level => "30"}}
+          assert_redirected_to new_session_path
+          @admin.reload
+          assert_equal(50, @admin.level)
+        end
+      end
+    end
   end
 end