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[py] expect a failure on 32bit systems, add a comment about -ffloat-store (closes gh-231)

--- a/python/tests/test_hztomel.py

+++ b/python/tests/test_hztomel.py

@@ -4,6 +4,7 @@

 from numpy.testing import TestCase

 from numpy.testing import assert_equal, assert_almost_equal

 from _tools import assert_warns

+from utils import is32bit

 import numpy as np

 import aubio

@@ -10,7 +11,6 @@

 from aubio import hztomel, meltohz

 from aubio import hztomel_htk, meltohz_htk

-

 class aubio_hztomel_test_case(TestCase):

     def test_hztomel(self):

@@ -17,7 +17,12 @@

         assert_equal(hztomel(0.), 0.)

         assert_almost_equal(hztomel(400. / 3.), 2., decimal=5)

         assert_almost_equal(hztomel(1000. / 3), 5.)

-        assert_equal(hztomel(200.), 3.)

+        # on 32bit, some of these tests fails unless compiling with -ffloat-store

+        try:

+            assert_equal(hztomel(200.), 3.)

+        except AssertionError:

+            if not is32bit(): raise

+            assert_almost_equal(hztomel(200.), 3., decimal=5)

         assert_almost_equal(hztomel(1000.), 15)

         assert_almost_equal(hztomel(6400), 42, decimal=5)

         assert_almost_equal(hztomel(40960), 69, decimal=5)

@@ -28,7 +33,11 @@

     def test_meltohz(self):

         assert_equal(meltohz(0.), 0.)

         assert_almost_equal(meltohz(2), 400. / 3., decimal=4)

-        assert_equal(meltohz(3.), 200.)

+        try:

+            assert_equal(meltohz(3.), 200.)

+        except AssertionError:

+            if not is32bit(): raise

+            assert_almost_equal(meltohz(3.), 200., decimal=5)

         assert_almost_equal(meltohz(5), 1000. / 3., decimal=4)

         assert_almost_equal(meltohz(15), 1000., decimal=4)

         assert_almost_equal(meltohz(42), 6400., decimal=2)