add support for user name changes

test/unit/user_name_change_request_test.rb

@@ -0,0 +1,89 @@
+require 'test_helper'
+
+class UserNameChangeRequestTest < ActiveSupport::TestCase
+  context "in all cases" do
+    setup do
+      @admin = FactoryGirl.create(:admin_user)
+      @requester = FactoryGirl.create(:user)
+      CurrentUser.user = @requester
+    end
+    
+    context "approving a request" do
+      setup do
+        @change_request = UserNameChangeRequest.create(
+          :user_id => @requester.id,
+          :original_name => @requester.name,
+          :status => "pending",
+          :desired_name => "abc"
+        )
+        CurrentUser.user = @admin
+      end
+      
+      should "create a dmail" do
+        assert_difference("Dmail.count", 2) do
+          @change_request.approve!
+        end
+      end
+      
+      should "change the user's name" do
+        @change_request.approve!
+        @requester.reload
+        assert_equal("abc", @requester.name)
+      end
+      
+      should "clear the user name cache" do
+        @change_request.approve!
+        assert_equal("abc", Cache.get("uin:#{@requester.id}"))
+      end
+    end
+    
+    context "rejecting a request" do
+      setup do
+        @change_request = UserNameChangeRequest.create(
+          :user_id => @requester.id,
+          :original_name => @requester.name,
+          :status => "pending",
+          :desired_name => "abc"
+        )
+        CurrentUser.user = @admin
+      end
+      
+      should "create a dmail" do
+        assert_difference("Dmail.count", 2) do
+          @change_request.reject!("msg")
+        end
+      end
+      
+      should "preserve the username" do
+        @change_request.reject!("msg")
+        @requester.reload
+        assert_not_equal("abc", @requester.name)
+      end
+    end
+    
+    context "creating a new request" do
+      should "send dmails to the admin" do
+        assert_difference("Dmail.count", 2) do
+          UserNameChangeRequest.create(
+            :user_id => @requester.id,
+            :original_name => @requester.name,
+            :status => "pending",
+            :desired_name => "abc"
+          )
+        end
+      end
+      
+      should "not validate if the desired name already exists" do
+        assert_difference("UserNameChangeRequest.count", 0) do
+          req = UserNameChangeRequest.create(
+            :user_id => @requester.id,
+            :original_name => @requester.name,
+            :status => "pending",
+            :desired_name => @requester.name
+          )
+          assert_equal(["Desired name already exists"], req.errors.full_messages)
+        end
+      end
+    end
+  end
+end