new_contents: from pychecker2.TestSupport import WarningTester
  from pychecker2 import ImportChecks
  
  class ImportTestCase(WarningTester):
      def testImportChecks(self):
          self.silent('import sys; print sys.argv')
          self.silent('import pychecker2; print pychecker2')
          self.silent('import pychecker2.utest; print pychecker2.utest')
  
      def testImportChecks(self):
          self.warning('import sys\n'
                       'print sys.argv\n'
                       'import sys\n',
                       3, ImportChecks.ImportCheck.duplicateImport,
                       'sys', ' in current scope')
          self.warning('from sys import *\n'
                       'def f():\n'
                       '  def g():\n'
                       '    from sys import argv\n'
                       '    return argv\n'
                       '  return g() + g()\n'
                       'print argv\n',
                       4, ImportChecks.ImportCheck.duplicateImport, 'argv',
                       ' of import in parent scope <ModuleScope: global>')
          self.warning('import no_such_module\n',
                       1, ImportChecks.ImportCheck.importError, 'no_such_module',
                       'No module named no_such_module')
          self.warning('from pychecker2.utest.data import *\n'
                       'import exceptions\n'
                       'print exceptions\n',
                       2, ImportChecks.ImportCheck.shadowImport,
                       'exceptions', 'pychecker2.utest.data', 1)
                       
  
subject: test import checks