Fix deprecation warning stacklevel

hypothesis-python/RELEASE.rst

@@ -0,0 +1,4 @@
+RELEASE_TYPE: patch
+
+This patch ensures that Hypothesis deprecation warnings display the code
+that emitted them when you're not running in ``-Werror`` mode (:issue:`652`).

hypothesis-python/src/hypothesis/_settings.py

@@ -845,7 +845,7 @@ def note_deprecation(message, s=None):
     verbosity = s.verbosity
     warning = HypothesisDeprecationWarning(message)
     if verbosity > Verbosity.quiet:
-        warnings.warn(warning, stacklevel=3)
+        warnings.warn(warning, stacklevel=2)
 
 
 settings.register_profile('default', settings())

hypothesis-python/tests/nocover/test_regressions.py

@@ -0,0 +1,44 @@
+# coding=utf-8
+#
+# This file is part of Hypothesis, which may be found at
+# https://github.com/HypothesisWorks/hypothesis-python
+#
+# Most of this work is copyright (C) 2013-2018 David R. MacIver
+# ([email protected]), but it contains contributions by others. See
+# CONTRIBUTING.rst for a full list of people who may hold copyright, and
+# consult the git log if you need to determine who owns an individual
+# contribution.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public License,
+# v. 2.0. If a copy of the MPL was not distributed with this file, You can
+# obtain one at http://mozilla.org/MPL/2.0/.
+#
+# END HEADER
+
+from __future__ import division, print_function, absolute_import
+
+import warnings
+
+from hypothesis.errors import HypothesisDeprecationWarning
+from hypothesis._settings import note_deprecation
+from hypothesis.strategies import integers, composite
+
+
+def test_note_deprecation_blames_right_code_issue_652():
+    msg = 'this is an arbitrary deprecation warning message'
+
+    @composite
+    def deprecated_strategy(draw):
+        draw(integers())
+        note_deprecation(msg)
+
+    with warnings.catch_warnings(record=True) as log:
+        warnings.simplefilter('always')
+        deprecated_strategy().example()
+
+    assert len(log) == 1
+    record, = log
+    # We got the warning we expected, from the right file
+    assert isinstance(record.message, HypothesisDeprecationWarning)
+    assert record.message.args == (msg,)
+    assert record.filename == __file__