fixes #145: add test function for janitor trials

app/logical/janitor_trial_tester.rb

@@ -0,0 +1,21 @@
+class JanitorTrialTester
+  attr_reader :user
+  
+  def initialize(user_name)
+    @user = User.find_by_name(user_name)
+  end
+  
+  def test
+    if user.nil?
+      "User not found"
+    elsif user.created_at > 1.month.ago
+      "User signed up within the past month"
+    elsif user.favorites.count < 100
+      "User has fewer than 100 favorites"
+    elsif user.feedback.negative.count > 0
+      "User has negative feedback"
+    else
+      "No issues found"
+    end
+  end
+end