Resurrect restore test and updates

tests/helpers/expect_helpers.exp

@@ -53,3 +53,13 @@ proc start_resurrect_save {} {
   send ""
   sleep 5
 }
+
+proc start_resurrect_restore {} {
+  send ""
+  sleep 10
+}
+
+proc clear_screen_for_window {target} {
+  send "tmux send-keys -t $target C-l\r"
+  sleep 0.2
+}

tests/helpers/restore_and_save_tmux_test_environment.exp

@@ -0,0 +1,18 @@
+#!/usr/bin/env expect
+
+source "./tests/helpers/expect_helpers.exp"
+
+expect_setup
+
+spawn tmux
+# delay with sleep to compensate for tmux starting time
+sleep 1
+
+start_resurrect_restore
+
+# delete all existing resurrect save files
+run_shell_command "rm ~/.tmux/resurrect/*"
+
+start_resurrect_save
+
+run_shell_command "tmux kill-server"

tests/helpers/resurrect_helpers.sh

@@ -6,7 +6,13 @@ install_tmux_resurrect_helper() {
 }
 
 # we want "fixed" dimensions no matter the size of real display
-set_screen_dimensions() {
+set_screen_dimensions_helper() {
 	stty cols 200
 	stty rows 50
 }
+
+last_save_file_differs_helper() {
+	local original_file="$1"
+	diff "$original_file" "${HOME}/.tmux/resurrect/last"
+	[ $? -ne 0 ]
+}