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Records a Test::Unit::Error.
 
               # File test-unit-3.3.7/lib/test/unit/error.rb, line 129
def add_error(error)
  @errors << error
  notify_fault(error)
  notify_changed
end
             
            Returns the number of errors this TestResult has recorded.
 
               # File test-unit-3.3.7/lib/test/unit/error.rb, line 137
def error_count
  @errors.size
end