code: def test_validate_float_with_negative_number(self):
      with self.assertRaisesRegex(
          ValueError, "expected a non-negative float"
      ):
          validate_float_arg(-1, "test")
  
imports: import numpy
  from keras import backend
  from keras import regularizers
  from keras import testing
  from keras.regularizers.regularizers import validate_float_arg
label_desc: Use image node_id 5 for calling the ValidateFloatArgTest obj's underlying member method code with example usage: obj.test_validate_float_with_negative_number() without return types