Add test for Generic.Files.OneObjectStructurePerFile sniff

composer.json

@@ -28,6 +28,7 @@
   "scripts": {
     "phpcbf": "phpcbf --standard=Alley-Interactive tests/*Test.php",
     "phpcs": "phpcs --standard=Alley-Interactive tests/*Test.php -vsn",
+    "phpcs:fixtures": "phpcs --standard=Alley-Interactive tests/fixtures",
     "phpunit": "phpunit",
     "test": [
       "@phpcs",

tests/fixtures/fail/one-object-structure.php

@@ -0,0 +1,48 @@
+<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
+/**
+ * One Object Structure per
+ *
+ * @package Alley\WP\Coding_Standards
+ */
+
+/**
+ * Example class.
+ */
+class AI_Example {
+	/**
+	 * Example property.
+	 *
+	 * @var string
+	 */
+	public $example_property;
+
+	/**
+	 * Example method.
+	 *
+	 * @return void
+	 */
+	public function example_method() {
+		echo 'Hello, World!';
+	}
+}
+
+/**
+ * Example class.
+ */
+class AI_Another_Example {
+	/**
+	 * Example property.
+	 *
+	 * @var string
+	 */
+	public $example_property;
+
+	/**
+	 * Example method.
+	 *
+	 * @return void
+	 */
+	public function example_method() {
+		echo 'Hello, World!';
+	}
+}