vici: Run Python tests via tox if available

Since we use the serial test harness we can't use AM_TESTS_ENVIRONMENT.
The script is necessary for out-of-tree builds.

src/libcharon/plugins/vici/python/Makefile.am

@@ -1,6 +1,7 @@
 EXTRA_DIST = LICENSE README.rst MANIFEST.in \
 	setup.py.in \
 	tox.ini \
+	tox.sh \
 	vici/test/__init__.py \
 	vici/test/test_protocol.py \
 	vici/__init__.py \
@@ -38,6 +39,12 @@ install-exec-local: dist/vici-$(PYTHON_PACKAGE_VERSION)-py$(PYTHON_VERSION).egg
 		dist/vici-$(PYTHON_PACKAGE_VERSION)-py$(PYTHON_VERSION).egg
 endif
 
+if USE_TOX
+  TESTS_ENVIRONMENT = export TOX=$(TOX);
+  AM_TESTS_FD_REDIRECT = 1>&2
+  TESTS = tox.sh
+endif
+
 if USE_PY_TEST
   TESTS = $(PY_TEST)
 endif

src/libcharon/plugins/vici/python/tox.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+${TOX} -c ${srcdir} --skip-missing-interpreters