Update domain regex to fix last two tests

lib/swot.rb

@@ -191,17 +191,16 @@ module Swot
     #
     # Returns a string with the FQDN; nil if there's an error.
     def get_domain(text)
-      text.strip!
-      return false if text.nil?
-      text.downcase!
-      text = text.split("@")[1] if text.include? "@"
+      PublicSuffix.parse text.downcase.match(domain_regex).captures.first
+    rescue
+      return nil
+    end
 
-      begin
-        domain = PublicSuffix.parse(text)
-        return domain
-      rescue
-        return nil
-      end
+    private
+
+    # http://rubular.com/r/uW2GqSxvqD
+    def domain_regex
+      /([^@\/:]+)[:\d]*$/
     end
   end
 end

test/test_swot.rb

@@ -21,8 +21,8 @@ class TestEmail < Test::Unit::TestCase
     assert_equal Swot::is_academic?('stanford.edu'),                  true
     assert_equal Swot::is_academic?('slac.stanford.edu'),             true
     assert_equal Swot::is_academic?('www.stanford.edu'),              true
-    #assert_equal Swot::is_academic?('http://www.stanford.edu'),       true
-    #assert_equal Swot::is_academic?('http://www.stanford.edu:9393'), true
+    assert_equal Swot::is_academic?('http://www.stanford.edu'),       true
+    assert_equal Swot::is_academic?('http://www.stanford.edu:9393'),  true
     assert_equal Swot::is_academic?('strath.ac.uk'),                  true
     assert_equal Swot::is_academic?('soft-eng.strath.ac.uk'),         true
     assert_equal Swot::is_academic?('ugr.es'),                        true