Fix ReflectionException in PHPUnit tests

Fixes "ReflectionException: Property WP_SQLite_DB::$allow_unsafe_unquoted_parameters does not exist"
in WordPress PHPUnit tests.

Author: JanJakes

.github/workflows/wp-tests-phpunit-run.js

@@ -22,18 +22,6 @@ const expectedErrors = [
 	'Tests_DB_Charset::test_strip_invalid_text',
 	'Tests_DB::test_db_reconnect',
 	'Tests_DB::test_get_col_info',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "escaped-false-1"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "escaped-false-2"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "escaped-true-1"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "escaped-true-2"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "format-false-1"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "format-false-2"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "format-true-1"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "format-true-2"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "numbered-false-1"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "numbered-false-2"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "numbered-true-1"',
-	'Tests_DB::test_prepare_should_respect_the_allow_unsafe_unquoted_parameters_property with data set "numbered-true-2"',
 	'Tests_DB::test_process_fields_value_too_long_for_field with data set "invalid chars"',
 	'Tests_DB::test_process_fields_value_too_long_for_field with data set "too long"',
 	'Tests_DB::test_process_fields',

wp-includes/sqlite/class-wp-sqlite-db.php

@@ -20,6 +20,16 @@ class WP_SQLite_DB extends wpdb {
 	 */
 	protected $dbh;
 
+	/**
+	 * Backward compatibility, see wpdb::$allow_unsafe_unquoted_parameters.
+	 *
+	 * This property is mirroring "wpdb::$allow_unsafe_unquoted_parameters",
+	 * because some tests are accessing it externally using PHP reflection.
+	 *
+	 * @var
+	 */
+	private $allow_unsafe_unquoted_parameters = true;
+
 	/**
 	 * Constructor
 	 *
@@ -289,6 +299,33 @@ public function check_connection( $allow_bail = true ) {
 		return true;
 	}
 
+	/**
+	 * Prepares a SQL query for safe execution.
+	 *
+	 * See "wpdb::prepare()". This override only fixes a WPDB test issue.
+	 *
+	 * @param string      $query   Query statement with `sprintf()`-like placeholders.
+	 * @param array|mixed $args    The array of variables or the first variable to substitute.
+	 * @param mixed       ...$args Further variables to substitute when using individual arguments.
+	 * @return string|void         Sanitized query string, if there is a query to prepare.
+	 */
+	public function prepare( $query, ...$args ) {
+		/*
+		 * Sync "$allow_unsafe_unquoted_parameters" with the WPDB parent property.
+		 * This is only needed because some WPDB tests are accessing the private
+		 * property externally via PHP reflection. This should be fixed WP tests.
+		 */
+		$wpdb_allow_unsafe_unquoted_parameters = $this->__get( 'allow_unsafe_unquoted_parameters' );
+		if ( $wpdb_allow_unsafe_unquoted_parameters !== $this->allow_unsafe_unquoted_parameters ) {
+			$property = new ReflectionProperty( 'wpdb', 'allow_unsafe_unquoted_parameters' );
+			$property->setAccessible( true );
+			$property->setValue( $this, $this->allow_unsafe_unquoted_parameters );
+			$property->setAccessible( false );
+		}
+
+		return parent::prepare( $query, ...$args );
+	}
+
 	/**
 	 * Performs a database query.
 	 *