dev-python/nose_warnings_filters: Port to py3.9, fix tests

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/nose_warnings_filters/nose_warnings_filters-0.1.5-r3.ebuild

@@ -3,7 +3,8 @@
 
 EAPI=7
 
-PYTHON_COMPAT=( python3_{6,7,8} )
+DISTUTILS_USE_SETUPTOOLS=rdepend
+PYTHON_COMPAT=( python3_{6..9} )
 
 inherit distutils-r1
 
@@ -14,19 +15,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 LICENSE="MIT"
 SLOT="0"
 KEYWORDS="amd64 ~arm64 ~ppc x86"
-IUSE="test"
-RESTRICT="!test? ( test )"
 
 RDEPEND="dev-python/nose[${PYTHON_USEDEP}]"
-DEPEND="
-	dev-python/setuptools[${PYTHON_USEDEP}]
-	test? ( ${RDEPEND} )"
 
-python_test() {
-	# nose_warnings_filters doesn't have a proper
-	# testing suite, hence we run the only testing
-	# script available
-	distutils_install_for_testing
-	cd "${TEST_DIR}"/lib || die
-	"${EPYTHON}" "${S}"/${PN}/testing/test_config.py || die "Failed running test script"
-}
+distutils_enable_tests nose