test: add test script mirroring homebrew formula

package.json

@@ -8,7 +8,7 @@
     "git-watch": "git-watch"
   },
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "./test.sh"
   },
   "repository": {
     "type": "git",

test.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+set -e
+
+# Setup a temporary directory for the test repository
+TEST_DIR=$(mktemp -d)
+trap 'rm -rf "$TEST_DIR"' EXIT
+
+# Absolute paths to the scripts in the current directory
+GIT_RECENT="$(pwd)/git-recent"
+GIT_RECENT_OG="$(pwd)/git-recent-og"
+
+echo "Running tests in $TEST_DIR"
+cd "$TEST_DIR"
+
+# 1. Initialize repository and commits
+git init --initial-branch=main
+git config user.name "BrewTestBot"
+git config user.email "brew@test.bot"
+
+git commit --allow-empty -m "test_commit"
+git checkout -b "feature-x-branch"
+git commit --allow-empty -m "commit on feature branch"
+git checkout -b "another-branch"
+git commit --allow-empty -m "commit on another branch"
+git checkout main
+
+# 2. Test git-recent-og
+echo "Testing git-recent-og..."
+OG_OUTPUT=$($GIT_RECENT_OG)
+if echo "$OG_OUTPUT" | grep -q "main" && echo "$OG_OUTPUT" | grep -q "BrewTestBot" && echo "$OG_OUTPUT" | grep -q "test_commit"; then
+  echo "✅ git-recent-og output matches expected pattern."
+else
+  echo "❌ git-recent-og output mismatch."
+  echo "Output was: $OG_OUTPUT"
+  exit 1
+fi
+
+# 3. Test git-recent
+# Setting GIT_RECENT_QUERY="x" uses fzf --filter="x" which is non-interactive.
+# git-recent logic: if fzf returns exactly one line (line_count == 0 due to printf/wc behavior), it checks it out.
+echo "Testing git-recent..."
+export GIT_RECENT_QUERY="x"
+$GIT_RECENT > /dev/null 2>&1
+
+CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+if [ "$CURRENT_BRANCH" == "feature-x-branch" ]; then
+  echo "✅ git-recent correctly checked out 'feature-x-branch'."
+else
+  echo "❌ git-recent failed to check out expected branch."
+  echo "Current branch is: $CURRENT_BRANCH"
+  exit 1
+fi
+
+echo "All tests passed! 🎉"