Add a basic test for webhook admin page

Author: superdav42

tests/WP_Ultimo/Admin_Pages/Webhook_Edit_Admin_Page_Test.php

@@ -0,0 +1,92 @@
+<?php
+
+namespace WP_Ultimo\Admin_Pages;
+
+use WP_Ajax_UnitTestCase;
+use WP_Ultimo\Models\Webhook;
+use WP_Ultimo\Faker;
+
+class Webhook_Edit_Admin_PageTest extends WP_Ajax_UnitTestCase {
+
+	/**
+	 * Instance of Webhook_Edit_Admin_Page to test.
+	 *
+	 * @var Webhook_Edit_Admin_Page
+	 */
+	protected $admin_page;
+
+	/**
+	 * Faker instance
+	 *
+	 * @var Faker
+	 */
+	protected $faker;
+
+	/**
+	 * Sets up the test scenario.
+	 */
+	public function setUp(): void {
+		parent::setUp();
+
+		// Initialize faker
+		$this->faker = new Faker();
+
+		// Create the admin page instance
+		$this->admin_page = new Webhook_Edit_Admin_Page();
+
+		// Generate a fake webhook using the Faker class
+		$this->faker->generate_fake_webhook(1);
+	}
+
+	/**
+	 * Test output_default_widget_payload outputs valid payload data.
+	 */
+	public function test_output_default_widget_payload_with_valid_event(): void {
+		// Get the generated webhook from faker
+		$webhooks = $this->faker->get_fake_data_generated('webhooks');
+		$webhook  = $webhooks[0];
+
+		// Set up the method to return our fake webhook
+		$this->admin_page = $this->getMockBuilder(Webhook_Edit_Admin_Page::class)
+								->setMethods(['get_object'])
+								->getMock();
+		$this->admin_page->method('get_object')->willReturn($webhook);
+
+		ob_start();
+		$this->admin_page->output_default_widget_payload();
+		$output = ob_get_clean();
+
+		$this->assertStringContainsString(
+			'Loading Payload',
+			$output,
+			'The payload output does not match the expected JSON data.'
+		);
+		$this->assertGreaterThan(100, strlen($output), 'The payload output is too short.');
+	}
+
+	/**
+	 * Test output_default_widget_payload handles missing event payload.
+	 */
+	public function test_output_default_widget_payload_with_no_payload(): void {
+		// Create a webhook with an unknown event
+		$webhook = wu_create_webhook(
+			[
+				'name'        => 'Test Webhook',
+				'webhook_url' => 'https://example.com',
+				'event'       => 'unknown_event',
+				'active'      => true,
+			]
+		);
+
+		$this->admin_page = $this->getMockBuilder(Webhook_Edit_Admin_Page::class)
+								->setMethods(['get_object'])
+								->getMock();
+		$this->admin_page->method('get_object')->willReturn($webhook);
+
+		ob_start();
+		$this->admin_page->output_default_widget_payload();
+		$output = ob_get_clean();
+
+		$this->assertStringContainsString('{}', trim($output), 'The payload output for an unknown event should be an empty JSON object.');
+	}
+}