Merge branch 'PR60'

* PR60:
  Use non-beta Python 3.8 on Travis
  Use Python 3.8 beta on Travis
  PEP8: 79 chars
  Use Xenial on Travis to test on Python3.7
  Fix Python 3.8 DeprecationWarning
  Add support for py37 and py38
  Raise warnings produced by isodate as errors during tests
  Avoid unclosed file warning

# Conflicts:
#	.travis.yml
#	setup.py
#	src/isodate/duration.py
#	src/isodate/tests/__init__.py
#	tox.ini

3 files changed, 39 insertions, 36 deletions

diff --git a/setup.py b/setup.py
index ba6627c..d5a3427 100644
--- a/setup.py
+++ b/setup.py
@@ -4,41 +4,39 @@ from setuptools import setup
 
 
 def read(*rnames):
-    return open(os.path.join(os.path.dirname(__file__), *rnames)).read()
+    with open(os.path.join(os.path.dirname(__file__), *rnames)) as read_file:
+        return read_file.read()
 
 
-setup(name='isodate',
-      version='0.7.0.dev0',
-      packages=['isodate', 'isodate.tests'],
-      package_dir={'': 'src'},
-
-      # PyPI metadata
-      author='Gerhard Weis',
-      author_email='gerhard.weis@proclos.com',
-      description='An ISO 8601 date/time/duration parser and formatter',
-      license='BSD-3-Clause',
-      license_files = ('LICENSE',),
-      # keywords = '',
-      url='https://github.com/gweis/isodate/',
-
-      long_description=(read('README.rst') +
-                        read('CHANGES.txt') +
-                        read('TODO.txt')),
-
-      classifiers=['Development Status :: 4 - Beta',
-                   # 'Environment :: Web Environment',
-                   'Intended Audience :: Developers',
-                   'License :: OSI Approved :: BSD License',
-                   'Operating System :: OS Independent',
-                   'Programming Language :: Python',
-                   'Programming Language :: Python :: 3',
-                   'Programming Language :: Python :: 3.7',
-                   'Programming Language :: Python :: 3.8',
-                   'Programming Language :: Python :: 3.9',
-                   'Programming Language :: Python :: 3.10',
-                   'Programming Language :: Python :: Implementation :: PyPy',
-                   'Topic :: Internet',
-                   ('Topic :: Software Development :'
-                    ': Libraries :: Python Modules'),
-                   ],
-      test_suite='isodate.tests.test_suite')
+setup(
+    name="isodate",
+    version="0.7.0.dev0",
+    packages=["isodate", "isodate.tests"],
+    package_dir={"": "src"},
+    # PyPI metadata
+    author="Gerhard Weis",
+    author_email="gerhard.weis@proclos.com",
+    description="An ISO 8601 date/time/duration parser and formatter",
+    license="BSD-3-Clause",
+    license_files=("LICENSE",),
+    # keywords = '',
+    url="https://github.com/gweis/isodate/",
+    long_description=(read("README.rst") + read("CHANGES.txt") + read("TODO.txt")),
+    classifiers=[
+        "Development Status :: 4 - Beta",
+        # 'Environment :: Web Environment',
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: BSD License",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: Implementation :: PyPy",
+        "Topic :: Internet",
+        ("Topic :: Software Development :" ": Libraries :: Python Modules"),
+    ],
+    test_suite="isodate.tests.test_suite",
+)
diff --git a/src/isodate/tests/__init__.py b/src/isodate/tests/__init__.py
index f68a79b..ea0f433 100644
--- a/src/isodate/tests/__init__.py
+++ b/src/isodate/tests/__init__.py
@@ -3,6 +3,7 @@ Collect all test suites into one TestSuite instance.
 """
 
 import unittest
+import warnings
 from isodate.tests import (
     test_date,
     test_time,
@@ -17,6 +18,8 @@ def test_suite():
     """
     Return a new TestSuite instance consisting of all available TestSuites.
     """
+    warnings.filterwarnings("error", module=r"isodate(\..)*")
+
     return unittest.TestSuite(
         [
             test_date.test_suite(),
diff --git a/tox.ini b/tox.ini
index 4410e0f..322d454 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,6 +5,8 @@ envlist =
 
 [testenv]
 deps =
+setenv =
+    PYTHONWARNINGS = default
 commands =
     {envpython} setup.py test
     pip install --quiet coverage