Added unit testing

.gitattributes

@@ -0,0 +1,5 @@
+/tests                export-ignore
+/phpunit.xml.dist     export-ignore
+/.github              export-ignore
+/.gitignore           export-ignore
+/CLAUDE.md            export-ignore

.github/workflows/tests.yml

@@ -0,0 +1,14 @@
+name: Tests
+on:
+  pull_request:
+    branches: [main]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: '7.4'
+      - run: composer install --no-progress
+      - run: composer test

.gitignore

@@ -1 +1,3 @@
-vendor
+/vendor/
+/.phpunit.result.cache
+/phpunit.xml

CLAUDE.md

@@ -0,0 +1,45 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+WordPress plugin updater library (`shazzad/plugin-updater`) that enables automatic updates, license verification, and remote plugin management for custom WordPress plugins. It hooks into WordPress core's update system to check a remote API for updates.
+
+## Commands
+
+```bash
+# Run tests
+composer test
+
+# Lint (WordPress coding standards + PHP compatibility)
+composer lint
+
+# Lint with WordPress coding standards only
+composer phpcs
+
+# Auto-fix coding standard violations
+composer fix
+```
+
+No phpunit.xml config exists yet — tests are fixture-based JSON files in `tests/fixtures/` representing API response shapes.
+
+## Architecture
+
+**Entry point:** `Integration` is the main class — consumer plugins instantiate it with API URL, product file, product ID, and optional license/menu config. The constructor wires up the three subsystems:
+
+- **`Integration`** (`src/Integration.php`) — Holds all shared state (API URL, product info, license config). Provides `api_request()` for all remote API calls and license/transient management helpers.
+- **`Updater`** (`src/Updater.php`) — Hooks into WordPress update system (`pre_set_site_transient_update_plugins`, `plugins_api`, `upgrader_package_options`, `upgrader_process_complete`) to inject update data from the remote API.
+- **`Admin`** (`src/Admin.php`) — Renders the license management admin page. Only instantiated when `license_enabled` and `display_menu` are both true. Handles license save/verify via POST with nonce verification.
+- **`Tracker`** (`src/Tracker.php`) — Handles plugin activation/deactivation hooks and hourly cron license sync via `sync_license_data()`.
+
+All classes receive the `Integration` instance and use its public properties directly (no getters/setters pattern).
+
+## Code Conventions
+
+- **WordPress coding standards** enforced via PHPCS (`WordPress` standard)
+- PHP 7.4+ with WordPress `ABSPATH` guard and `class_exists()` guard wrapping each class
+- Namespace: `Shazzad\PluginUpdater` with PSR-4 autoloading from `src/`
+- Uses tabs for indentation (WordPress standard)
+- All API calls go through `Integration::api_request()` — returns associative array on success or `WP_Error` on failure
+- WordPress capability required for admin: `delete_users`

README.md

@@ -19,18 +19,15 @@ A comprehensive WordPress plugin updater library that enables automatic updates,
 
 ## Installation
 
-1. Copy the plugin updater files to your plugin directory
-2. Include the Integration class in your main plugin file
-3. Initialize the updater with your configuration
+```bash
+composer require shazzad/plugin-updater
+```
 
 ## Quick Start
 
 ```php
 <?php
-// Include the Integration class
-require_once plugin_dir_path( __FILE__ ) . 'updater/Integration.php';
-
-// Initialize the updater
+// Initialize the updater (autoloaded via Composer)
 new \Shazzad\PluginUpdater\Integration(
     'https://your-api-server.com/api',  // API URL
     plugin_basename( __FILE__ ),        // Plugin file path

composer.json

@@ -31,11 +31,13 @@
 		"ext-curl": "*"
 	},
 	"require-dev": {
+		"brain/monkey": "^2.6",
+		"dealerdirect/phpcodesniffer-composer-installer": "^0.7.2",
+		"mockery/mockery": "^1.6",
+		"phpcompatibility/php-compatibility": "^9.3",
 		"phpunit/phpunit": "^9.0",
 		"squizlabs/php_codesniffer": "^3.6",
-		"wp-coding-standards/wpcs": "^2.3",
-		"phpcompatibility/php-compatibility": "^9.3",
-		"dealerdirect/phpcodesniffer-composer-installer": "^0.7.2"
+		"wp-coding-standards/wpcs": "^2.3"
 	},
 	"autoload": {
 		"psr-4": {
@@ -84,4 +86,4 @@
 			"dev-v2.x": "2.x-dev"
 		}
 	}
-}
+}