TST: Add tests for constants.

Test the values of np.pi, np.e, and np.euler_gamma to make sure
they are correct to relative tolerance 1e-15.

1 files changed, 13 insertions, 0 deletions

diff --git a/numpy/core/tests/test_umath.py b/numpy/core/tests/test_umath.py
index 892b1fae6..bd281e000 100644
--- a/numpy/core/tests/test_umath.py
+++ b/numpy/core/tests/test_umath.py
@@ -20,6 +20,19 @@ class _FilterInvalids(object):
         np.seterr(**self.olderr)
 
 
+class TestConstants(TestCase):
+    def test_pi(self):
+        assert_allclose(ncu.pi, 3.141592653589793, 1e-15)
+
+
+    def test_e(self):
+        assert_allclose(ncu.e, 2.718281828459045, 1e-15)
+
+
+    def test_euler_gamma(self):
+        assert_allclose(ncu.euler_gamma, 0.5772156649015329, 1e-15)
+
+
 class TestDivision(TestCase):
     def test_division_int(self):
         # int division should follow Python