def test_get_prev_extension_from_block(self):
        """
        Ensure Languages.get_prevalent_extension_from_block works as intended
        """
        block = {'compileExtension' : 'cpp',
                 'runExtension'     : 'o'}
        self.assertEqual(Languages.get_prevalent_extension_from_block(block), 'cpp')

        block = { 'runExtension'     : 'o'}
        self.assertEqual(Languages.get_prevalent_extension_from_block(block), 'o')

        block = {'compileExtension' : 'cpp'}
        self.assertEqual(Languages.get_prevalent_extension_from_block(block), 'cpp')