TST: Add test to ensure assert_array_max_ulp ignores ULP differences betwen NAN's

r-devulap · r-devulap · commit ce86ca558946 · 2020-02-18T20:40:32.000-08:00
diff --git a/numpy/core/tests/test_umath_accuracy.py b/numpy/core/tests/test_umath_accuracy.py
@@ -52,3 +52,9 @@ def test_validate_transcendentals(self):
                         outval = outval[perm]
                         maxulperr = data_subset['ulperr'].max()
                         assert_array_max_ulp(npfunc(inval), outval, maxulperr)
+
+    def test_ignore_nan_ulperror(self):
+        # Ignore ULP differences between various NAN's
+        nan1_f32 = np.array(str_to_float('0xffffffff'), dtype=np.float32)
+        nan2_f32 = np.array(str_to_float('0x7fddbfbf'), dtype=np.float32)
+        assert_array_max_ulp(nan1_f32, nan2_f32, 0)
