test/test_jax.py

import unittest
import numpy as np
from pysr import pysr, sympy2jax
from jax import numpy as jnp
from jax import random
from jax import grad
import sympy

class TestJAX(unittest.TestCase):
    def test_sympy2jax(self):
        x, y, z = sympy.symbols('x y z')
        cosx = 1.0 * sympy.cos(x) + y
        key = random.PRNGKey(0)
        X = random.normal(key, (1000, 2))
        true = 1.0 * jnp.cos(X[:, 0]) + X[:, 1]
        f, params = sympy2jax(cosx, [x, y, z])
        self.assertTrue(jnp.all(jnp.isclose(f(X, params), true)).item())