test_all.sh: improve

tests/test_all.sh

 #!/bin/sh -e
 
+fatal()
+{
+    exit 1
+}
+
+set -o pipefail
+
+epm print info
+
 epm update
 
+epm --auto remove erc
+
 epm --auto install erc
 
 epm --auto remove erc
 
 epm --auto autoremove
 
+epm --auto autoremove --direct
+
+epm --auto autoorphans
+
 epm --auto upgrade
 
-epm --auto downgrade-release
+epmqf bash
+
+epm ql eepm | head
+
+epm cl erc | head
+
+epm --auto --force downgrade-release p10
+
+epm --auto --force downgrade-release
+
+epm --auto --force upgrade-release
+
+epm --auto --force upgrade-release
+
+epm --auto --force upgrade-release && fatal
+
+epm --auto --force upgrade-release Sisyphus
+
+epm checkpkg eepm
+
+epm clean