feat: add tests for linux (#39)

* feat: add dummy test for linux

* feat: add multiple test execution

* fix: update exec of multiple scripts for linux

* fix: execute tests with code from the branch

* fix: fail test exec if at least one test fail

* fix: typo

* wip: test if symlink work

* feat: add new test for check setup of light256 theme

* feat: when theme enabled and not set it default to dark256

* feat: increase tests coverage of checking themes activation

* refactor: rename tests_linux job

* chore: add changelog entry

tests/linux/test_check_gruvbox_light256_enabled.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+CURRENT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# shellcheck disable=SC1091
+source "${CURRENT_DIR}/../tmux_helpers.sh"
+
+main() {
+  helper_tearup_linux
+
+  cat <<EOF >~/.tmux.conf
+# List of plugins
+set -g @plugin 'tmux-plugins/tpm'
+set -g @plugin 'tmux-plugins/tmux-sensible'
+
+# Other plugins
+set -g @plugin 'egel/tmux-gruvbox'
+set -g @tmux-gruvbox 'light256'
+
+# Initialize TMUX plugin manager (keep this line at the very bottom of tmux.conf)
+run '~/.tmux/plugins/tpm/tpm'
+EOF
+
+  cat ~/.tmux.conf
+
+  # it's essential to link current repo to the plugins' directory
+  ln -sfv "$CURRENT_DIR/../../../tmux-gruvbox" "${HOME}/.tmux/plugins/tmux-gruvbox"
+
+  helper_install_tpm_plugins
+
+  # start new detached session
+  tmux new -d
+
+  # check if left side match
+  _status_left_expected="#[bg=colour243,fg=colour255] #S #[bg=colour252,fg=colour243,nobold,noitalics,nounderscore]"
+  _status_left_current=$(tmux show-option -gqv status-left)
+  if [[ "$_status_left_current" != "$_status_left_expected" ]]; then
+    helper_print_fail "status-left did not match" "$_status_left_current" "$_status_left_expected"
+    helper_teardown
+    exit 1
+  fi
+  # check if status is not transparent
+  _status_style_expected="bg=colour252,fg=colour239"
+  _status_style_current=$(tmux show-option -gqv status-style)
+  if [[ "$_status_style_current" != "$_status_style_expected" ]]; then
+    helper_print_fail "status-style did not match" "$_status_style_current" "$_status_style_expected"
+    helper_teardown
+    exit 1
+  fi
+
+  helper_print_success "status-left match"
+  helper_teardown
+  exit 0
+
+}
+
+main "$@"