dev-python/{doublex-expects,expects,mamba}: EAPI 7 + py37

All in one commit because of this depenceny graph:
- doublex-expects: RDEPEND expects, DEPEND mamba
- expects: DEPEND mamba
- mamba: DEPEND expects, doublex-expects
Bug: https://bugs.gentoo.org/711092
Signed-off-by: Sebastian Pipping <sping@gentoo.org>

dev-python/expects/expects-0.8.0-r1.ebuild

@@ -0,0 +1,37 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+PYTHON_COMPAT=( python3_{6,7} )
+
+inherit distutils-r1
+
+DESCRIPTION="Expressive and extensible TDD/BDD assertion library for Python"
+HOMEPAGE="https://github.com/jaimegildesagredo/expects"
+SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="doc test"
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	doc? ( dev-python/sphinx[${PYTHON_USEDEP}] )
+	test? ( dev-python/mamba[${PYTHON_USEDEP}] )
+"
+RDEPEND=""
+
+python_compile_all() {
+	use doc && emake -C docs html
+}
+
+python_test() {
+	mamba || die "tests failed under ${EPYTHON}"
+}
+
+python_install_all() {
+	use doc && local HTML_DOCS=( docs/_build/html/. )
+
+	distutils-r1_python_install_all
+}