feat: add multiple test execution

tests/tmux_helpers.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+helper_teardown_tmux() {
+  rm -rf ~/.tmux.conf
+  rm -rf ~/.tmux/
+  tmux kill-server >/dev/null 2>&1
+}
+
+helper_tearup_linux_tmux() {
+  if [[ "$(uname)" != "Linux" ]]; then
+    echo "NOT LINUX. Failed & exit."
+    exit 1
+  fi
+
+  # install software
+  sudo apt update -y
+  sudo apt install -y tmux git
+
+  # download TPM
+  mkdir -p ~/.tmux/plugins/
+  git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm
+}
+
+helper_print_fail_and_exit() {
+  local _msg="${1:-}"
+  printf "FAIL. %s\n" "${_msg}"
+  exit 1
+}
+
+helper_print_success_and_exit() {
+  local _msg="${1:-}"
+  printf "SUCCESS. %s\n" "${_msg}"
+  exit 0
+}
+
+# install TMP plugins with command
+helper_install_tpm_plugins() {
+  bash -c "${HOME}/.tmux/plugins/tpm/scripts/install_plugins.sh install_plugins"
+}