TestFloatField: fix test_render_big_numbers on Python 2.7

product/ERP5Form/tests/testFields.py

@@ -166,9 +166,9 @@ class TestFloatField(ERP5TypeTestCase):
   def test_render_big_numbers(self):
     self.field.values['precision'] = 2
     self.field.values['editable'] = 0
-    self.assertEquals('10000000000000000000.00',
-                      self.field.render(10000000000000000000))
-    self.assertEquals('1e+100', self.field.render(1e+100))
+    self.assertEquals('10000000000000.00',
+                      self.field.render(10000000000000))
+    self.assertEquals('1e+20', self.field.render(1e+20))
 
   def test_validate_thousand_separator_point(self):
     self.field.values['input_style'] = '-1 234.5'

product/Formulator/Widget.py

@@ -1812,7 +1812,9 @@ class FloatWidget(TextWidget):
         float_value = float(value)
         if percent:
           float_value *= 100
-        if precision not in (None, ''):
+        if precision not in (None, '') and (
+           # ignore precision for too big absolute numbers
+           abs(float_value) * 10**precision < 2**53):
           # if we have a precision, then use it now
           value = ('%%0.%sf' % precision) % float_value
         else: