Fixes #304, add ignore_warnings

_unittests/ut_pycode/test_extunittest.py

@@ -7,7 +7,8 @@
 import warnings
 import pandas
 
-from pyquickhelper.pycode import ExtTestCase, unittest_require_at_least
+from pyquickhelper.pycode import (
+    ExtTestCase, unittest_require_at_least, ignore_warnings)
 from pyquickhelper.pandashelper import df2rst
 from pyquickhelper import __file__ as rootfile
 
@@ -249,6 +250,7 @@ def zoo2():
         except Exception as e:
             self.assertIn('older than', str(e))
 
+    @ignore_warnings(RuntimeWarning)
     def test_sparse_arr(self):
         from numpy import array
         from scipy.sparse import coo_matrix, csc_matrix, csr_matrix

src/pyquickhelper/pycode/__init__.py

@@ -15,7 +15,8 @@
 from .unittestclass import (
     ExtTestCase, skipif_appveyor, skipif_travis, skipif_circleci,
     skipif_linux, skipif_vless, skipif_azure_macosx,
-    skipif_azure, skipif_azure_linux, unittest_require_at_least
+    skipif_azure, skipif_azure_linux, unittest_require_at_least,
+    ignore_warnings
 )
 from .pytest_helper import run_test_function, TestExecutionError
 from .utils_tests import main_wrapper_tests

src/pyquickhelper/pycode/unittestclass.py

@@ -8,6 +8,7 @@
 import unittest
 import warnings
 import decimal
+from functools import wraps
 import pprint
 from logging import getLogger, INFO, StreamHandler
 from contextlib import redirect_stdout, redirect_stderr
@@ -50,8 +51,7 @@ def _format_str(s):
         """
         if hasattr(s, "replace"):
             return "'{0}'".format(s)
-        else:
-            return s
+        return s
 
     def assertNotEmpty(self, x):
         """
@@ -624,3 +624,21 @@ def unittest_require_at_least(mod, version, msg=""):
     msg = "Module '{}'  is older than '{}' (= '{}'). {}".format(
         mod, version, v, msg)
     return unittest.skip(msg)
+
+
+def ignore_warnings(warns):
+    """
+    Catches warnings.
+
+    @param      warns   warnings to ignore
+    """
+    def wrapper(fct):
+        if warns is None:
+            raise AssertionError(  # pragma: no cover
+                "warns cannot be None for '{}'.".format(fct))
+        def call_f(self):
+            with warnings.catch_warnings():
+                warnings.simplefilter("ignore", warns)
+                return fct(self)
+        return call_f
+    return wrapper