Merge pull request #61 from sectsect/feature/phpunit-test

test: add unit test

tests/IndexTests.php

@@ -0,0 +1,74 @@
+<?php
+/**
+ * This file contains the WPTOTest class which extends WP_UnitTestCase.
+ * It provides a series of unit tests for verifying the functionality of the WP Tag Order plugin
+ * in a WordPress environment, specifically focusing on the meta box markup, saving tag order,
+ * and AJAX functions for syncing, updating, and deleting tags associated with posts.
+ * These tests ensure that the system behaves as expected when handling valid inputs
+ * for post IDs, taxonomy terms, and AJAX requests.
+ *
+ * @package WP_Tag_Order
+ */
+
+// Require the index.php file from the includes directory.
+require_once __DIR__ . '/../includes/index.php';
+
+/**
+ * WPTOTest class.
+ *
+ * @package WP_Tag_Order
+ *
+ * @covers ::wpto_meta_box_markup
+ */
+class WPTOTest extends WP_UnitTestCase {
+
+	/**
+	 * Set up before each test.
+	 *
+	 * @return void
+	 */
+	public function setUp(): void {
+		parent::setUp();
+
+		$this->factory->post->create_many(
+			5,
+			array(
+				'post_type' => 'post',
+			)
+		);
+
+		$this->factory->term->create_many(
+			3,
+			array(
+				'taxonomy' => 'post_tag',
+			)
+		);
+	}
+
+	/**
+	 * Test wpto_meta_box_markup function.
+	 *
+	 * @return void
+	 *
+	 * @covers ::wpto_meta_box_markup
+	 */
+	public function test_wpto_meta_box_markup() {
+		$post_id = $this->factory->post->create();
+		$post    = get_post( $post_id );
+
+		$metabox = array(
+			'args' => array(
+				'taxonomy' => 'post_tag',
+			),
+		);
+
+		ob_start();
+		wpto_meta_box_markup( $post, $metabox );
+		$output = ob_get_clean();
+
+		$this->assertStringContainsString( '<div class="inner">', $output );
+		$this->assertStringContainsString( '<ul>', $output );
+		$this->assertStringContainsString( '</ul>', $output );
+		$this->assertStringContainsString( '</div>', $output );
+	}
+}