From 52cb6bfad5da48e1717919c7693e86d1fb785eb6 Mon Sep 17 00:00:00 2001
From: Chris Kerr <chris.kerr@mykolab.ch>
Date: Sun, 24 May 2020 18:59:18 +0300
Subject: [PATCH] Don't check the sign when the value is zero

---
 test/test_gaunt.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/test_gaunt.py b/test/test_gaunt.py
index e33f7b9..07e62cb 100644
--- a/test/test_gaunt.py
+++ b/test/test_gaunt.py
@@ -56,8 +56,10 @@ def test_sympy_gaunt_vs_wigner(lmkp):
 def test_python_vs_sympy_gaunt2(lmkp):
     L, M, K, P = lmkp
     sympy_result = sympy_matrix_element_G(L, M, K, P)
+    sympy_sign = sympy.sign(sympy_result)
     python_result, sign = gaunt._modified_gaunt_squared(L, K, P, M)
-    assert sign == sympy.sign(sympy_result)
+    if sympy_sign != 0:
+        assert sign == sympy_sign
     assert_sympy_equal(
         python_result,
         sympy_result ** 2,
-- 
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