dev-python/astroid: fix tests on py37

Signed-off-by: Virgil Dupras <vdupras@gentoo.org>
Package-Manager: Portage-2.3.51, Repoman-2.3.11

dev-python/astroid/astroid-2.1.0.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2019 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -32,6 +32,10 @@ DEPEND="
 		dev-python/python-dateutil[${PYTHON_USEDEP}]
 	)"
 
+PATCHES=(
+	"${FILESDIR}/${PN}-2.1.0-fix-tests.patch"
+)
+
 python_prepare_all() {
 	# Disable failing tests
 

dev-python/astroid/files/astroid-2.1.0-fix-tests.patch

@@ -0,0 +1,16 @@
+typed_ast doesn't support py37 yet and disables its support under py37.
+However, when dev-python/types-ast is installed, the test suite mistakenly
+thinks that it has to test typed_ast-related things and fails.
+diff --git a/astroid/tests/unittest_nodes.py b/astroid/tests/unittest_nodes.py
+index 56b195c2..762f1af2 100644
+--- a/astroid/tests/unittest_nodes.py
++++ b/astroid/tests/unittest_nodes.py
+@@ -49,6 +49,8 @@ try:
+ except ImportError:
+     HAS_TYPED_AST = False
+ 
++if sys.version_info[:2] >= (3, 7):
++    HAS_TYPED_AST = False
+ 
+ class AsStringTest(resources.SysPathSetup, unittest.TestCase):
+     def test_tuple_as_string(self):