Test case sensitivity

lib/swot.rb

@@ -101,17 +101,28 @@ module Swot
     # Returns true if the domain name belongs to an academic institution;
     #  false oterwise.
     def is_academic?(text)
+      return false if text.nil?
+
+      text.downcase!
       text = text.split("@")[1] if text.include? "@"
-      domain = PublicSuffix.parse(text)
 
-      if ACADEMIC_TLDS.include?(domain.tld)
+      begin
-        true
+        domain = PublicSuffix.parse(text)
-      elsif match_academic_domain?(domain)
+
-        true
+        if ACADEMIC_TLDS.include?(domain.tld)
-      else
+          true
-        false
+        elsif match_academic_domain?(domain)
+          true
+        else
+          false
+        end
+
+      rescue PublicSuffix::DomainInvalid => di
+        return false
+
+      rescue PublicSuffix::DomainNotAllowed => dna
+        return false
       end
-
     end
 
     # Figure out if a domain name is a know academic institution.

test/test_email.rb

@@ -1,8 +1,10 @@
 require 'helper'
 
 class TestEmail < Test::Unit::TestCase
-  should "work with all the things" do
+  should "recognizes academic email addresses and domains" do
     assert_equal Swot::is_academic?('lreilly@stanford.edu'),          true
+    assert_equal Swot::is_academic?('LREILLY@STANFORD.EDU'),          true
+    assert_equal Swot::is_academic?('Lreilly@Stanford.Edu'),          true
     assert_equal Swot::is_academic?('lreilly@slac.stanford.edu'),     true
     assert_equal Swot::is_academic?('lreilly@strath.ac.uk'),          true
     assert_equal Swot::is_academic?('lreilly@soft-eng.strath.ac.uk'), true
@@ -33,5 +35,9 @@ class TestEmail < Test::Unit::TestCase
     assert_equal Swot::is_academic?('stanford.edu.com'),              false
     assert_equal Swot::is_academic?('strath.ac.uk.com'),              false
 
+    assert_equal Swot::is_academic?(nil),                             false
+    assert_equal Swot::is_academic?(''),                              false
+    assert_equal Swot::is_academic?('the'),                           false
+
   end
 end