Added docs, test infra and export functions

.gitignore

@@ -1,3 +1,10 @@
 /vendor
 /.idea
-/.vscode
+/.vscode
+/docker
+docker-compose.yml
+supervisord.log
+supervisord.pid
+test.php
+.phpunit.result.cache
+phpunit-export.json

README.MD

@@ -59,3 +59,22 @@ $collection->header($key, $value);
 $item->header($key, $value);
 $request->header($key, $value);
 ```
+
+### Exporting
+
+Collections can be exported to the filesystem as well as serving them to your browser, you can even
+handle the json yourself using the `toJson()` or `toArray()` methods.
+
+```php
+$collection->toFile('path/postman-collection.json');
+$collection->download();
+$collection->serve();
+```
+
+## Testing
+
+To run the tests install all the dependencies using composer and then simply run:
+
+```bash
+composer test
+```

composer.json

@@ -3,19 +3,37 @@
     "type": "library",
     "require": {
         "php": "^8.0",
+        "ext-json": "*",
         "ramsey/uuid": "^4.2.2"
     },
+    "require-dev": {
+        "phpunit/phpunit": "10.0.x-dev"
+    },
     "license": "MIT",
     "autoload": {
         "psr-4": {
             "WebScientist\\Postman\\": "src/"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\": "tests/"
+        }
+    },
     "authors": [
         {
             "name": "Chinmay Purav",
             "email": "experiment@webscientist.xyz"
         }
     ],
-    "minimum-stability": "dev"
-}
+    "scripts": {
+        "test": "phpunit"
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "preferred-install": "dist",
+        "sort-packages": true
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
+}