class_docstr: Tests that the template is compatible with all interfaces, including the computation
  of gradients.
class_docstr_tok: ["Tests","that","the","template","is","compatible","with","all","interfaces",",","including","the","computation","of","gradients","."]
docstr: Tests the jax interface.
docstr_tok: ["Tests","the","jax","interface","."]
code: def test_jax(self):
      """Tests the jax interface."""
  
      import jax
      import jax.numpy as jnp
  
      weight = jnp.array(0.5)
      dev = qml.device("default.qubit", wires=4)
  
      circuit = qml.QNode(circuit_template, dev)
  
      circuit(weight)
      grad_fn = jax.grad(circuit)
  
      # check that the gradient is computed without error
      grad_fn(weight)
  
file_path: pennylane/tests/templates/test_subroutines/test_single_excitation.py
imports: import pytest
  import numpy
  from pennylane import numpy
  import pennylane
label_desc: Use image node_id 2 for calling the TestInterfaces obj's underlying member method code with example usage: obj.test_jax() without return types