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Ajax: Add unit tests for wp_ajax_delete_meta() #11873

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Ajax: Add unit tests for wp_ajax_delete_meta() #11873

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182 changes: 182 additions & 0 deletions tests/phpunit/tests/admin/includes/ajax-actions/deleteMeta.php
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<?php

/**
* Admin Ajax functions to be tested.
*/
require_once ABSPATH . 'wp-admin/includes/ajax-actions.php';

/**
* Testing wp_ajax_delete_meta() functionality.
*
* @package WordPress
* @subpackage UnitTests
* @since 3.1.0
*
* @group ajax
*
* @covers ::wp_ajax_delete_meta
*/
class Tests_wp_ajax_delete_meta extends WP_Ajax_UnitTestCase {

/**
* Administrator user ID.
*
* @var int
*/
protected static $admin_id;

/**
* Subscriber user ID.
*
* @var int
*/
protected static $subscriber_id;

/**
* Post ID to attach meta to.
*
* @var int
*/
protected static $post_id;

/**
* Setup test fixtures.
*/
public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ): void {
self::$admin_id = $factory->user->create( array( 'role' => 'administrator' ) );
self::$subscriber_id = $factory->user->create( array( 'role' => 'subscriber' ) );
self::$post_id = $factory->post->create();
}

/**
* Setup before each test method.
*/
public function set_up(): void {
parent::set_up();
add_action( 'admin_init', 'wp_ajax_delete_meta', 1 );
}

/**
* Tests successful meta deletion.
*
* @ticket 65252
*/
public function test_delete_meta_success(): void {
wp_set_current_user( self::$admin_id );

$meta_id = add_post_meta( self::$post_id, 'test_meta_key', 'test_value' );

$_POST = array(
'id' => $meta_id,
'_ajax_nonce' => wp_create_nonce( "delete-meta_$meta_id" ),
);

try {
$this->_handleAjax( 'delete_meta' );
} catch ( WPAjaxDieStopException $e ) {
$this->assertSame( '1', $e->getMessage(), 'AJAX response should be 1 (success).' );
} catch ( WPAjaxDieContinueException $e ) {
$this->assertSame( '1', $e->getMessage(), 'AJAX response should be 1 (success).' );
}

$this->assertFalse( get_metadata_by_mid( 'post', $meta_id ), 'Meta should be deleted.' );
}

/**
* Tests meta deletion failure due to invalid nonce.
*
* @ticket 65252
*/
public function test_delete_meta_invalid_nonce(): void {
wp_set_current_user( self::$admin_id );

$meta_id = add_post_meta( self::$post_id, 'test_meta_key_nonce', 'test_value' );

$_POST = array(
'id' => $meta_id,
'_ajax_nonce' => 'invalid-nonce',
);

$this->expectException( WPAjaxDieStopException::class );
$this->expectExceptionMessage( '-1' );

$this->_handleAjax( 'delete_meta' );
}

/**
* Tests meta deletion failure due to insufficient permissions.
*
* @ticket 65252
*/
public function test_delete_meta_insufficient_permissions(): void {
wp_set_current_user( self::$subscriber_id );

$meta_id = add_post_meta( self::$post_id, 'test_meta_key_perms', 'test_value' );

$_POST = array(
'id' => $meta_id,
'_ajax_nonce' => wp_create_nonce( "delete-meta_$meta_id" ),
);

try {
$this->_handleAjax( 'delete_meta' );
} catch ( WPAjaxDieStopException $e ) {
$this->assertSame( '-1', $e->getMessage(), 'AJAX response should be -1 (insufficient permissions).' );
} catch ( WPAjaxDieContinueException $e ) {
$this->assertSame( '-1', $e->getMessage(), 'AJAX response should be -1 (insufficient permissions).' );
}

$this->assertNotFalse( get_metadata_by_mid( 'post', $meta_id ), 'Meta should NOT be deleted.' );
}

/**
* Tests meta deletion failure for protected meta.
*
* @ticket 65252
*/
public function test_delete_meta_protected(): void {
wp_set_current_user( self::$admin_id );

// Meta keys starting with underscore are protected.
$meta_id = add_post_meta( self::$post_id, '_protected_meta_key', 'test_value' );

$_POST = array(
'id' => $meta_id,
'_ajax_nonce' => wp_create_nonce( "delete-meta_$meta_id" ),
);

try {
$this->_handleAjax( 'delete_meta' );
} catch ( WPAjaxDieStopException $e ) {
$this->assertSame( '-1', $e->getMessage(), 'AJAX response should be -1 for protected meta.' );
} catch ( WPAjaxDieContinueException $e ) {
$this->assertSame( '-1', $e->getMessage(), 'AJAX response should be -1 for protected meta.' );
}

$this->assertNotFalse( get_metadata_by_mid( 'post', $meta_id ), 'Protected meta should NOT be deleted.' );
}

/**
* Tests meta deletion with non-existent ID.
*
* @ticket 65252
*/
public function test_delete_meta_non_existent_id(): void {
wp_set_current_user( self::$admin_id );

$meta_id = 99999;

$_POST = array(
'id' => $meta_id,
'_ajax_nonce' => wp_create_nonce( "delete-meta_$meta_id" ),
);

try {
$this->_handleAjax( 'delete_meta' );
} catch ( WPAjaxDieStopException $e ) {
$this->assertSame( '1', $e->getMessage(), 'AJAX response should be 1 if meta doesn\'t exist.' );
} catch ( WPAjaxDieContinueException $e ) {
$this->assertSame( '1', $e->getMessage(), 'AJAX response should be 1 if meta doesn\'t exist.' );
}
}
}
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