fixed broken specs

spec/models/at_user_observer_spec.rb

+require 'spec_helper'
+
+describe AtUserObserver do
+  before :each do
+    @text =
+"""
+hi @tom, I have a question from @pi314 about the following code:
+```
+class A
+  def set_some_variable
+    @some_variable = 1
+  end
+end
+```
+and also the following code
+    class A
+      def get_some_variable
+        @some_variable
+      end
+    end
+what is the 'at' symbol doing there? @dementrock
+"""
+    User.delete_all
+    User.create!(external_id: "1", username: "tom", email: "tom@test.com")
+    User.create!(external_id: "2", username: "pi314", email: "pi314@test.com")
+  end
+
+  describe "#get_marked_text(text)" do
+    it "returns marked at text" do
+      converted = AtUserObserver.send :get_marked_text, @text
+      converted.should include "@tom_0"
+      converted.should include "@pi314_1"
+      converted.should include "@some_variable_2"
+      converted.should include "@some_variable_3"
+      converted.should include "@dementrock_4"
+    end
+  end
+
+  describe "#get_valid_at_position_list(text)" do
+    it "returns the list of positions for the valid @ notifications, filtering out the ones in code blocks" do
+      list = AtUserObserver.send :get_valid_at_position_list, @text
+      list.should include({ position: 0, username: "tom", user_id: "1" })
+      list.should include({ position: 1, username: "pi314", user_id: "2" })
+      list.length.should == 2
+    end
+  end
+end