test_all.sh: improve tests

tests/test_all.sh

@@ -5,6 +5,12 @@ fatal()
     exit 1
 }
 
+restore_epm()
+{
+	# in the far future: epm upgrade /usr/src/RPM/RPMS/noarch/*.rpm
+	epm --auto install /usr/src/RPM/RPMS/noarch/*.rpm
+}
+
 set -e -x
 set -o pipefail
 
@@ -12,6 +18,10 @@ epm print info
 
 epm update
 
+epm upgrade /usr/src/RPM/RPMS/noarch/*.rpm
+
+epm downgrade /usr/src/RPM/RPMS/noarch/*.rpm
+
 epm --auto remove erc
 
 epm --auto install erc
@@ -34,6 +44,7 @@ epm cl erc | head
 
 # Sisyphus -> p10
 epm --auto --force --force-yes downgrade-release p10
+restore_epm
 
 # p10 -> p9
 epm --auto --force --force-yes downgrade-release
@@ -41,13 +52,22 @@ restore_epm
 
 # p9 -> p10
 epm --auto --force --force-yes upgrade-release
+restore_epm
 
 # try upgrade p10
 epm --auto --force --force-yes upgrade-release && fatal
+restore_epm
 
 # p10 -> Sisyphus
 epm --auto --force --force-yes upgrade-release Sisyphus
+restore_epm
 
 epm checkpkg eepm
 
+epm upgrade eepm
+restore_epm || :
+
+epm downgrade eepm
+restore_epm || :
+
 epm clean