Remove setup.py test

Removed the "python setup.py test" feature in favor of a straight run of
"tox".   Per Pypa / pytest developers, "setup.py" commands are in general
headed towards deprecation in favor of tox.  The tox.ini script has been
updated such that running "tox" with no arguments will perform a single run
of the test suite against the default installed Python interpreter.

Fixes: #157
Change-Id: Iacfd486be3e76d3531422ead3ebadf4ecebb806f

docs/build/unreleased/157.rst

@@ -0,0 +1,16 @@
+.. change::
+    :tags: bug, setup
+    :tickets: 157
+
+    Removed the "python setup.py test" feature in favor of a straight run of
+    "tox".   Per Pypa / pytest developers, "setup.py" commands are in general
+    headed towards deprecation in favor of tox.  The tox.ini script has been
+    updated such that running "tox" with no arguments will perform a single run
+    of the test suite against the default installed Python interpreter.
+
+    .. seealso::
+
+        https://github.com/pypa/setuptools/issues/1684
+
+        https://github.com/pytest-dev/pytest/issues/5534
+

setup.py

@@ -7,24 +7,19 @@
 from setuptools.command.test import test as TestCommand
 
 
-class PyTest(TestCommand):
-    user_options = [("pytest-args=", "a", "Arguments to pass to py.test")]
-
-    def initialize_options(self):
-        TestCommand.initialize_options(self)
-        self.pytest_args = []
-
-    def finalize_options(self):
-        TestCommand.finalize_options(self)
-        self.test_args = []
-        self.test_suite = True
+class UseTox(TestCommand):
+    RED = 31
+    RESET_SEQ = "\033[0m"
+    BOLD_SEQ = "\033[1m"
+    COLOR_SEQ = "\033[1;%dm"
 
     def run_tests(self):
-        # import here, cause outside the eggs aren't loaded
-        import pytest
-
-        errno = pytest.main(self.pytest_args)
-        sys.exit(errno)
+        sys.stderr.write(
+            "%s%spython setup.py test is deprecated by pypa.  Please invoke "
+            "'tox' with no arguments for a basic test run.\n%s"
+            % (self.COLOR_SEQ % self.RED, self.BOLD_SEQ, self.RESET_SEQ)
+        )
+        sys.exit(1)
 
 
 v = open(os.path.join(os.path.dirname(__file__), "dogpile", "__init__.py"))
@@ -57,6 +52,5 @@ def run_tests(self):
     """,
     zip_safe=False,
     install_requires=["decorator>=4.0.0"],
-    tests_require=["pytest", "pytest-cov", "mock", "Mako"],
-    cmdclass={"test": PyTest},
+    cmdclass={"test": UseTox},
 )

tox.ini

@@ -1,6 +1,5 @@
 [tox]
-minversion=1.8.dev1
-envlist = py{27,35,36,37}
+envlist = py
 
 [testenv]
 cov_args=--cov=dogpile --cov-append --cov-report term --cov-report xml
@@ -46,7 +45,7 @@ usedevelop=True
 
 # thanks to https://julien.danjou.info/the-best-flake8-extensions/
 [testenv:pep8]
-basepython = python3.7
+basepython = python3
 deps=
       flake8
       flake8-import-order