added cancel to login

tests/run-shell-tests.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT_DIR"
+
+if ! command -v bats >/dev/null 2>&1; then
+  echo "bats is not installed. Install with: brew install bats-core" >&2
+  exit 1
+fi
+
+bats tests/shell/git_update.bats