Fixed exception on parsing pseudo-classes.

lib/mail_style/inline_styles.rb

@@ -14,6 +14,7 @@ def create_mail_with_inline_styles
 
       protected
 
+      # Flatten nested parts
       def collect_parts(parts)
         nested = !parts.empty? ? parts.map { |p| collect_parts(p.parts) }.flatten : []
         [parts, nested].flatten
@@ -41,6 +42,7 @@ def parse_html(html)
         element_styles = {}
 
         css_parser.each_selector do |selector, declaration, specificity|
+          next if selector.include?(':')
           html_document.css(selector).each do |element|
             declaration.to_s.split(';').each do |style|
               # Split style in attribute and value

spec/inline_styles_spec.rb

@@ -15,7 +15,7 @@ class TestMailer < ActionMailer::Base
   def test_multipart(css_file = nil)
     setup_email(css_file)
     content_type 'multipart/alternative'
-    part :content_type => 'text/html', :body => '<p class="text">Hello World</p>'
+    part :content_type => 'text/html', :body => '<p class="text">Hello <a href="htt://example.com/">World</a></p>'
     part :content_type => 'text/plain', :body => 'Hello World'
   end
 
@@ -98,6 +98,13 @@ def setup_email(css_file = nil)
   it "should add both styles to paragraph" do
     should match(/<p class="text" style="color: #0f0;font-size: 14px;line-height: 1.5">/)
   end
+
+  it "should not crash on :pseudo-classes" do
+    css_rules("a:link { color: #f00 }")
+    expect do
+      subject
+    end.to_not raise_error(StandardError)
+  end
 end
 
 describe 'Inline styles' do