Add pruning tests

Author: vrutkovs

.cci.jenkinsfile

@@ -35,6 +35,26 @@ coreos.pod([image: 'registry.fedoraproject.org/fedora:30', privileged: true, kvm
               cosa_cmd("buildupload --dry-run s3 --acl=public-read my-nonexistent-bucket/my/prefix")
           }
       }
+
+      stage("Pruning test") {
+        coreos.shwrap("cat /srv/builds/builds.json")
+        cosa_cmd("build ostree --force-image")
+        cosa_cmd("build ostree --force-image")
+        cosa_cmd("build ostree --force-image")
+        coreos.shwrap("cat /srv/builds/builds.json")
+        cosa_cmd("build ostree --force-image --skip-prune")
+        coreos.shwrap("cat /srv/builds/builds.json")
+        cosa_cmd("build ostree --force-image")
+        cosa_cmd("build ostree --force-image")
+        coreos.shwrap("cat /srv/builds/builds.json")
+        cosa_cmd("prune --workdir /srv --dry-run")
+        coreos.shwrap("cat /srv/builds/builds.json")
+        cosa_cmd("prune --workdir /srv --dry-run --keep-last-n=1")
+        coreos.shwrap("cat /srv/builds/builds.json")
+        cosa_cmd("prune --workdir /srv --dry-run --keep-last-n=0")
+        cosa_cmd("prune --workdir /srv --dry-run --keep-last-days=5")
+        coreos.shwrap("cat /srv/builds/builds.json")
+      }
 }
 
 def cosa_cmd(args) {