FIX: Don't allow invalid email to be saved.

spec/components/validators/email_validator_spec.rb

@@ -32,4 +32,16 @@ describe EmailValidator do
     end
   end
 
+  context '.email_regex' do
+    it 'should match valid emails' do
+      expect(!!('test@discourse.org' =~ EmailValidator.email_regex)).to eq(true)
+    end
+
+    it 'should not match invalid emails' do
+      ['testdiscourse.org', 'test@discourse.org; a@discourse.org', 'random'].each do |email|
+        expect(!!(email =~ EmailValidator.email_regex)).to eq(false)
+      end
+    end
+  end
+
 end