Add test for trapz

Trapz was removed in numpy2

Author: lbolla

Makefile

@@ -17,7 +17,7 @@ upgrade:  ## Upgrade dependencies
 	$(UV) lock --upgrade
 	$(UV) sync
 
-test: lint  ## Run tests
+test:  ## Run tests
 	$(UV) run pytest
 
 black:  ## Run formatter

tests/utils_test.py

@@ -21,3 +21,9 @@ def test_norm(self):
         self.assertEqual(U.norm([0, 1, 0]), 1)
         self.assertEqual(U.norm([0, 0, 1]), 1)
         assert_almost_equal(U.norm([1, 0, 1]), math.sqrt(2))
+
+    def test_trapz2(self):
+        f = [[i + j for i in range(5)] for j in range(5)]
+        res = U.trapz2(f, dx=1.0, dy=1.0)
+        # integral of f = x + y over [0,4]x[0,4] = 64
+        self.assertAlmostEqual(res, 64.0)