Use isclose instead of exact equality when testing sum of large Series

Author: eoincondron

pandas/tests/reductions/test_reductions.py

@@ -751,9 +751,8 @@ def test_sum_overflow_float(self, use_bottleneck, dtype):
         with pd.option_context("use_bottleneck", use_bottleneck):
             v = np.arange(5000000, dtype=dtype)
             s = Series(v)
-
             result = s.sum(skipna=False)
-            assert result == v.sum(dtype=dtype)
+            assert np.isclose(result, v.sum(dtype=dtype))
             result = s.min(skipna=False)
             assert np.allclose(float(result), 0.0)
             result = s.max(skipna=False)