add venv; test under venv

.travis/unittest.sh

@@ -15,7 +15,7 @@ unittest(){
     if [ $? != 0 ]; then
         exit 1
     fi
-    find . -name 'tests' -type d -print0 | \
+    find . -path ./tools/venv -prune -false -o -name 'tests' -type d -print0 | \
         xargs -0 -I{} -n1 bash -c \
         'python3 -m unittest discover -v -s {}'
     cd - > /dev/null
@@ -24,6 +24,10 @@ unittest(){
 trap 'abort' 0
 set -e
 
+pushd tools; make; popd
+. tools/venv/bin/activate
+pip3 install pytest
+
 unittest .
 
 trap : 0

setup.sh

@@ -1,9 +1,8 @@
 #! /usr/bin/env  bash
 
-if [ `id -u ` == 0 ]; then
-  SUDO=
-else
-  SUDO='sudo'
+SUDO='sudo'
+if [ $(id -u) -eq 0 ]; then
+  SUDO=''
 fi
 
 if [ -e /etc/lsb-release ];then

tools/Makefile

@@ -0,0 +1,13 @@
+PYTHON:= python3.7
+.PHONY: all clean
+
+all: virtualenv
+
+virtualenv:
+	test -d venv || virtualenv -p $(PYTHON) venv
+	touch venv/bin/activate
+
+clean:
+	rm -fr venv
+	find -iname "*.pyc" -delete
+