class_docstr: Tests for normalization functions
class_docstr_tok: ["Tests","for","normalization","functions"]
docstr: Test that the computed normalization constant of a contracted Gaussian function is
  correct.
docstr_tok: ["Test","that","the","computed","normalization","constant","of","a","contracted","Gaussian","function","is","correct","."]
code: def test_contraction_norm(self, l, alpha, a, n):
      r"""Test that the computed normalization constant of a contracted Gaussian function is
      correct."""
      assert np.allclose(qchem.contracted_norm(l, alpha, a), n)
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane import qchem
label_desc: Use image node_id 2 for calling the TestNorm obj's underlying member method code with example usage: obj.test_contraction_norm(l, alpha, a, n) without return types