tmux tpm plugin

configs/tmux/plugins/tpm/tests/expect_successful_clean_plugins

@@ -0,0 +1,35 @@
+#!/usr/bin/env expect
+
+# disables script output
+log_user 0
+
+spawn tmux
+
+# Waiting for tmux to attach. If this is not done, next command, `send` will
+# not work properly.
+sleep 1
+
+# this is tmux prefix + alt + u
+send "u"
+
+set timeout 5
+
+expect_after {
+  timeout { exit 1 }
+}
+
+expect {
+  "Removing \"tmux-example-plugin\""
+}
+
+expect {
+  "\"tmux-example-plugin\" clean success"
+}
+
+expect {
+  "Done, press ENTER to continue." {
+    exit 0
+  }
+}
+
+exit 1