Fix size option for ldap.search method

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Author: dzaporozhets

lib/net/ldap.rb

@@ -678,7 +678,18 @@ def search(args = {})
       end
 
       if return_result_set
-        (!@result.nil? && @result.result_code == 0) ? result_set : nil
+        unless @result.nil?
+          case @result.result_code
+          when 0
+            # everything good
+            result_set
+          when 4
+            # LDAP: Size limit exceeded
+            # This happens when we use size option and results are truncated
+            # Still we need to return user results
+            result_set
+          end
+        end
       else
         @result.success?
       end

test/test_ldap.rb

@@ -40,4 +40,20 @@ def test_instrument_search
     assert_equal [entry], payload[:result]
     assert_equal "(uid=user1)", payload[:filter]
   end
+
+  def test_instrument_search_with_size
+    events = @service.subscribe "search.net_ldap"
+
+    flexmock(@connection).should_receive(:bind).and_return(flexmock(:bind_result, :result_code => 0))
+    flexmock(@connection).should_receive(:search).with(Hash, Proc).
+                yields(entry = Net::LDAP::Entry.new("uid=user1,ou=users,dc=example,dc=com")).
+                and_return(flexmock(:search_result, :success? => true, :result_code => 4))
+
+    refute_nil @subject.search(:filter => "(uid=user1)", :size => 1)
+
+    payload, result = events.pop
+    assert_equal [entry], result
+    assert_equal [entry], payload[:result]
+    assert_equal "(uid=user1)", payload[:filter]
+  end
 end