remove duplicates

Author: matthewstyler

lib/suppressions_populator.rb

@@ -19,6 +19,8 @@ def initialize(tokens)
   end
 
   def populate
-    "#{HEADER}\n#{@tokens.map(&:to_suppression).join("\n")}\n\n#{FOOTER}"
+    "#{HEADER}\n#{@tokens.uniq do |token|
+                    [token.file_name, token.offense]
+                  end.map(&:to_suppression).join("\n")}\n\n#{FOOTER}"
   end
 end

test/checkstyle_output_token_test.rb

@@ -10,6 +10,6 @@ def test_initialize
     assert_equal 'WARNING', token.severity
     assert_equal 'file.java', token.file_name
     assert_equal 'WhitespaceAround', token.offense
-    assert_equal "  <suppress checks=\"WhitespaceAround\" files=\"file.java\"/>", token.to_suppression
+    assert_equal '  <suppress checks="WhitespaceAround" files="file.java"/>', token.to_suppression
   end
 end

test/suppressions_populator_test.rb

@@ -5,6 +5,7 @@
 class SuppressionsPopulatorTest < Minitest::Test
   def setup
     @tokens = [
+      CheckstyleOutputToken.new(['', 'WARNING', 'file1.java', 'Offense1']),
       CheckstyleOutputToken.new(['', 'WARNING', 'file1.java', 'Offense1']),
       CheckstyleOutputToken.new(['', 'ERROR', 'file2.java', 'Offense2']),
       CheckstyleOutputToken.new(['', 'WARNING', 'file3.java', 'Offense3'])