[TOBESQUASHED] test_nelder_mead: Expect test_rotated_hyper_ellipsoid …

…fails on darwin

quantecon/optimize/tests/test_nelder_mead.py

@@ -223,9 +223,6 @@ def test_perm_function(self):
         assert_allclose(results.fun, fun, atol=1e-7)
 
     def test_rotated_hyper_ellipsoid(self):
-        if platform == 'darwin':
-            # skip for darwin
-            return
         d = 5
         x0 = np.random.normal(size=d)
         bounds = np.array([[-65.536, 65.536]] * d)
@@ -236,8 +233,13 @@ def test_rotated_hyper_ellipsoid(self):
         results = nelder_mead(rotated_hyper_ellipsoid, x0, bounds=bounds,
                               tol_x=1e-30, tol_f=1e-30)
 
-        assert_allclose(results.x, sol, atol=1e-7)
-        assert_allclose(results.fun, fun, atol=1e-7)
+        if platform == 'darwin':
+            # TODO investigate on darwin why the result is not allclose
+            assert not np.allclose(results.x, sol, atol=1e-7)
+            assert not np.allclose(results.fun, fun, atol=1e-7)
+        else:
+            assert_allclose(results.x, sol, atol=1e-7)
+            assert_allclose(results.fun, fun, atol=1e-7)
 
     def test_booth(self):
         x0 = np.array([0., 0.])