Test resurrect save feature

tests/helpers/create_and_save_tmux_test_environment.exp

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+#!/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
+
+run_shell_command "cd /tmp"
+
+# session red
+rename_current_session "red"
+
+new_tmux_window
+horizontal_split
+vertical_split
+
+new_tmux_window
+horizontal_split
+
+# session blue
+new_tmux_session "blue"
+
+run_shell_command "touch foo.txt"
+run_shell_command "vim foo.txt"
+
+new_tmux_window
+vertical_split
+run_shell_command "man echo"
+
+new_tmux_window
+
+# session yellow
+new_tmux_session "yellow"
+run_shell_command "mkdir bar"
+run_shell_command "cd bar"
+
+start_resurrect_save
+
+run_shell_command "tmux kill-server"

tests/helpers/expect_helpers.exp

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+# a set of expect helpers
+
+# basic setup for each script
+proc expect_setup {} {
+  # disables script output
+  log_user 0
+  # standard timeout
+  set timeout 5
+}
+
+proc new_tmux_window {} {
+  send "c"
+  send "cd /tmp\r"
+  sleep 0.2
+}
+
+proc rename_current_session {name} {
+  send "$"
+  # delete existing name with ctrl-u
+  send ""
+  send "$name\r"
+  sleep 0.2
+}
+
+proc new_tmux_session {name} {
+  send "TMUX='' tmux new -d -s $name\r"
+  sleep 1
+  send "tmux switch-client -t $name\r"
+  send "cd /tmp\r"
+  sleep 0.5
+}
+
+proc horizontal_split {} {
+  send "\""
+  sleep 0.2
+  send "cd /tmp\r"
+  sleep 0.1
+}
+
+proc vertical_split {} {
+  send "%"
+  sleep 0.2
+  send "cd /tmp\r"
+  sleep 0.1
+}
+
+proc run_shell_command {command} {
+  send "$command\r"
+  sleep 1
+}
+
+proc start_resurrect_save {} {
+  send ""
+  sleep 5
+}

tests/helpers/resurrect_helpers.sh

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+install_tmux_resurrect_helper() {
+	rm -rf ~/.tmux/plugins/tmux-resurrect/
+	cd "$CURRENT_DIR"
+	git clone --recursive ../ ~/.tmux/plugins/tmux-resurrect/ >/dev/null 2>&1
+	cd - >/dev/null
+}
+
+# we want "fixed" dimensions no matter the size of real display
+set_screen_dimensions() {
+	stty cols 200
+	stty rows 50
+}