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<title>[50150] trunk: REST API: Return detailed error information from request validation.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/50150">50150</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/50150","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>TimothyBlynJacobs</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-02-02 17:26:06 +0000 (Tue, 02 Feb 2021)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>REST API: Return detailed error information from request validation.

Previously, only the first error message for each parameter was made available. Now, all error messages for a parameter are concatenated. Additionally, the detailed error for each parameter is made available in a new `details` section of the validation error. Each error is formatted following the standard REST API error formatting.

The `WP_REST_Server::error_to_response` method has been abstracted out into a standalone function `rest_convert_error_to_response` to allow for reuse by `WP_REST_Request`. The formatted errors now also contain an `additional_data` property which contains the additional error data provided by `WP_Error::get_all_error_data`.

Props dlh, xkon, TimothyBlynJacobs.
Fixes <a href="https://core.trac.wordpress.org/ticket/46191">#46191</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesrestapiclasswprestrequestphp">trunk/src/wp-includes/rest-api/class-wp-rest-request.php</a></li>
<li><a href="#trunksrcwpincludesrestapiclasswprestserverphp">trunk/src/wp-includes/rest-api/class-wp-rest-server.php</a></li>
<li><a href="#trunksrcwpincludesrestapiphp">trunk/src/wp-includes/rest-api.php</a></li>
<li><a href="#trunktestsphpunittestsrestapirestattachmentscontrollerphp">trunk/tests/phpunit/tests/rest-api/rest-attachments-controller.php</a></li>
<li><a href="#trunktestsphpunittestsrestapirestrequestphp">trunk/tests/phpunit/tests/rest-api/rest-request.php</a></li>
<li><a href="#trunktestsphpunittestsrestapirestserverphp">trunk/tests/phpunit/tests/rest-api/rest-server.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesrestapiclasswprestrequestphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/rest-api/class-wp-rest-request.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/rest-api/class-wp-rest-request.php  2021-02-02 17:21:45 UTC (rev 50149)
+++ trunk/src/wp-includes/rest-api/class-wp-rest-request.php    2021-02-02 17:26:06 UTC (rev 50150)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -802,7 +802,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $order = $this->get_parameter_order();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $invalid_params = array();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $invalid_params  = array();
+               $invalid_details = array();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                foreach ( $order as $type ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( empty( $this->params[ $type ] ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -825,10 +826,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        continue;
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                /** @var mixed|WP_Error $sanitized_value */
</ins><span class="cx" style="display: block; padding: 0 10px">                                 $sanitized_value = call_user_func( $param_args['sanitize_callback'], $value, $this, $key );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( is_wp_error( $sanitized_value ) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        $invalid_params[ $key ] = $sanitized_value->get_error_message();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 $invalid_params[ $key ]  = implode( ' ', $sanitized_value->get_error_messages() );
+                                       $invalid_details[ $key ] = rest_convert_error_to_response( $sanitized_value )->get_data();
</ins><span class="cx" style="display: block; padding: 0 10px">                                 } else {
</span><span class="cx" style="display: block; padding: 0 10px">                                        $this->params[ $type ][ $key ] = $sanitized_value;
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -841,8 +844,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                /* translators: %s: List of invalid parameters. */
</span><span class="cx" style="display: block; padding: 0 10px">                                sprintf( __( 'Invalid parameter(s): %s' ), implode( ', ', array_keys( $invalid_params ) ) ),
</span><span class="cx" style="display: block; padding: 0 10px">                                array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'status' => 400,
-                                       'params' => $invalid_params,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'status'  => 400,
+                                       'params'  => $invalid_params,
+                                       'details' => $invalid_details,
</ins><span class="cx" style="display: block; padding: 0 10px">                                 )
</span><span class="cx" style="display: block; padding: 0 10px">                        );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -894,7 +898,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * This is done after required checking as required checking is cheaper.
</span><span class="cx" style="display: block; padding: 0 10px">                 */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $invalid_params = array();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $invalid_params  = array();
+               $invalid_details = array();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                foreach ( $args as $key => $arg ) {
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -901,6 +906,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        $param = $this->get_param( $key );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( null !== $param && ! empty( $arg['validate_callback'] ) ) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                /** @var bool|\WP_Error $valid_check */
</ins><span class="cx" style="display: block; padding: 0 10px">                                 $valid_check = call_user_func( $arg['validate_callback'], $param, $this, $key );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( false === $valid_check ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -908,7 +914,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( is_wp_error( $valid_check ) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        $invalid_params[ $key ] = $valid_check->get_error_message();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 $invalid_params[ $key ]  = implode( ' ', $valid_check->get_error_messages() );
+                                       $invalid_details[ $key ] = rest_convert_error_to_response( $valid_check )->get_data();
</ins><span class="cx" style="display: block; padding: 0 10px">                                 }
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -919,8 +926,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                /* translators: %s: List of invalid parameters. */
</span><span class="cx" style="display: block; padding: 0 10px">                                sprintf( __( 'Invalid parameter(s): %s' ), implode( ', ', array_keys( $invalid_params ) ) ),
</span><span class="cx" style="display: block; padding: 0 10px">                                array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'status' => 400,
-                                       'params' => $invalid_params,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'status'  => 400,
+                                       'params'  => $invalid_params,
+                                       'details' => $invalid_details,
</ins><span class="cx" style="display: block; padding: 0 10px">                                 )
</span><span class="cx" style="display: block; padding: 0 10px">                        );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span></span></pre></div>
<a id="trunksrcwpincludesrestapiclasswprestserverphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/rest-api/class-wp-rest-server.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/rest-api/class-wp-rest-server.php   2021-02-02 17:21:45 UTC (rev 50149)
+++ trunk/src/wp-includes/rest-api/class-wp-rest-server.php     2021-02-02 17:26:06 UTC (rev 50150)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -196,41 +196,13 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * list in JSON rather than an object/map.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 4.4.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @since 5.7.0 Converted to a wrapper of {@see rest_convert_error_to_response()}.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @param WP_Error $error WP_Error instance.
</span><span class="cx" style="display: block; padding: 0 10px">         * @return WP_REST_Response List of associative arrays with code and message keys.
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        protected function error_to_response( $error ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $error_data = $error->get_error_data();
-
-               if ( is_array( $error_data ) && isset( $error_data['status'] ) ) {
-                       $status = $error_data['status'];
-               } else {
-                       $status = 500;
-               }
-
-               $errors = array();
-
-               foreach ( (array) $error->errors as $code => $messages ) {
-                       foreach ( (array) $messages as $message ) {
-                               $errors[] = array(
-                                       'code'    => $code,
-                                       'message' => $message,
-                                       'data'    => $error->get_error_data( $code ),
-                               );
-                       }
-               }
-
-               $data = $errors[0];
-               if ( count( $errors ) > 1 ) {
-                       // Remove the primary error.
-                       array_shift( $errors );
-                       $data['additional_errors'] = $errors;
-               }
-
-               $response = new WP_REST_Response( $data, $status );
-
-               return $response;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         return rest_convert_error_to_response( $error );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span></span></pre></div>
<a id="trunksrcwpincludesrestapiphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/rest-api.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/rest-api.php        2021-02-02 17:21:45 UTC (rev 50149)
+++ trunk/src/wp-includes/rest-api.php  2021-02-02 17:26:06 UTC (rev 50150)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3182,3 +3182,57 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        return $endpoint_args;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+
+/**
+ * Converts an error to a response object.
+ *
+ * This iterates over all error codes and messages to change it into a flat
+ * array. This enables simpler client behaviour, as it is represented as a
+ * list in JSON rather than an object/map.
+ *
+ * @since 5.7.0
+ *
+ * @param WP_Error $error WP_Error instance.
+ *
+ * @return WP_REST_Response List of associative arrays with code and message keys.
+ */
+function rest_convert_error_to_response( $error ) {
+       $status = array_reduce(
+               $error->get_all_error_data(),
+               function ( $status, $error_data ) {
+                       return is_array( $error_data ) && isset( $error_data['status'] ) ? $error_data['status'] : $status;
+               },
+               500
+       );
+
+       $errors = array();
+
+       foreach ( (array) $error->errors as $code => $messages ) {
+               $all_data  = $error->get_all_error_data( $code );
+               $last_data = array_pop( $all_data );
+
+               foreach ( (array) $messages as $message ) {
+                       $formatted = array(
+                               'code'    => $code,
+                               'message' => $message,
+                               'data'    => $last_data,
+                       );
+
+                       if ( $all_data ) {
+                               $formatted['additional_data'] = $all_data;
+                       }
+
+                       $errors[] = $formatted;
+               }
+       }
+
+       $data = $errors[0];
+       if ( count( $errors ) > 1 ) {
+               // Remove the primary error.
+               array_shift( $errors );
+               $data['additional_errors'] = $errors;
+       }
+
+       return new WP_REST_Response( $data, $status );
+}
</ins></span></pre></div>
<a id="trunktestsphpunittestsrestapirestattachmentscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/rest-api/rest-attachments-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/rest-api/rest-attachments-controller.php        2021-02-02 17:21:45 UTC (rev 50149)
+++ trunk/tests/phpunit/tests/rest-api/rest-attachments-controller.php  2021-02-02 17:26:06 UTC (rev 50150)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -455,9 +455,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $request->set_param( 'status', 'publish' );
</span><span class="cx" style="display: block; padding: 0 10px">                $request->set_param( 'context', 'edit' );
</span><span class="cx" style="display: block; padding: 0 10px">                $response = rest_get_server()->dispatch( $request );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $data     = $response->get_data();
-               $this->assertCount( 3, $data );
-               $this->assertSame( 'rest_invalid_param', $data['code'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->assertErrorResponse( 'rest_invalid_param', $response );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_get_items_private_status() {
</span></span></pre></div>
<a id="trunktestsphpunittestsrestapirestrequestphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/rest-api/rest-request.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/rest-api/rest-request.php       2021-02-02 17:21:45 UTC (rev 50149)
+++ trunk/tests/phpunit/tests/rest-api/rest-request.php 2021-02-02 17:26:06 UTC (rev 50150)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -462,6 +462,78 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSame( 'rest_invalid_param', $valid->get_error_code() );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        /**
+        * @ticket 46191
+        */
+       public function test_sanitize_params_error_multiple_messages() {
+               $this->request->set_url_params(
+                       array(
+                               'failparam' => '123',
+                       )
+               );
+               $this->request->set_attributes(
+                       array(
+                               'args' => array(
+                                       'failparam' => array(
+                                               'sanitize_callback' => function () {
+                                                       $error = new WP_Error( 'invalid', 'Invalid.' );
+                                                       $error->add( 'invalid', 'Super Invalid.' );
+                                                       $error->add( 'broken', 'Broken.' );
+
+                                                       return $error;
+                                               },
+                                       ),
+                               ),
+                       )
+               );
+
+               $valid = $this->request->sanitize_params();
+               $this->assertWPError( $valid );
+               $data = $valid->get_error_data();
+
+               $this->assertInternalType( 'array', $data );
+               $this->assertArrayHasKey( 'params', $data );
+               $this->assertArrayHasKey( 'failparam', $data['params'] );
+               $this->assertEquals( 'Invalid. Super Invalid. Broken.', $data['params']['failparam'] );
+       }
+
+       /**
+        * @ticket 46191
+        */
+       public function test_sanitize_params_provides_detailed_errors() {
+               $this->request->set_url_params(
+                       array(
+                               'failparam' => '123',
+                       )
+               );
+               $this->request->set_attributes(
+                       array(
+                               'args' => array(
+                                       'failparam' => array(
+                                               'sanitize_callback' => function () {
+                                                       return new WP_Error( 'invalid', 'Invalid.', 'mydata' );
+                                               },
+                                       ),
+                               ),
+                       )
+               );
+
+               $valid = $this->request->sanitize_params();
+               $this->assertWPError( $valid );
+
+               $data = $valid->get_error_data();
+               $this->assertArrayHasKey( 'details', $data );
+               $this->assertArrayHasKey( 'failparam', $data['details'] );
+               $this->assertEquals(
+                       array(
+                               'code'    => 'invalid',
+                               'message' => 'Invalid.',
+                               'data'    => 'mydata',
+                       ),
+                       $data['details']['failparam']
+               );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         public function test_sanitize_params_with_null_callback() {
</span><span class="cx" style="display: block; padding: 0 10px">                $this->request->set_url_params(
</span><span class="cx" style="display: block; padding: 0 10px">                        array(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -652,6 +724,79 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSame( 'This is not valid!', $error_data['params']['someotherparams'] );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       /**
+        * @ticket 46191
+        */
+       public function test_invalid_params_error_multiple_messages() {
+               $this->request->set_url_params(
+                       array(
+                               'failparam' => '123',
+                       )
+               );
+               $this->request->set_attributes(
+                       array(
+                               'args' => array(
+                                       'failparam' => array(
+                                               'validate_callback' => function () {
+                                                       $error = new WP_Error( 'invalid', 'Invalid.' );
+                                                       $error->add( 'invalid', 'Super Invalid.' );
+                                                       $error->add( 'broken', 'Broken.' );
+
+                                                       return $error;
+                                               },
+                                       ),
+                               ),
+                       )
+               );
+
+               $valid = $this->request->has_valid_params();
+               $this->assertWPError( $valid );
+               $data = $valid->get_error_data();
+
+               $this->assertInternalType( 'array', $data );
+               $this->assertArrayHasKey( 'params', $data );
+               $this->assertArrayHasKey( 'failparam', $data['params'] );
+               $this->assertEquals( 'Invalid. Super Invalid. Broken.', $data['params']['failparam'] );
+       }
+
+       /**
+        * @ticket 46191
+        */
+       public function test_invalid_params_provides_detailed_errors() {
+               $this->request->set_url_params(
+                       array(
+                               'failparam' => '123',
+                       )
+               );
+               $this->request->set_attributes(
+                       array(
+                               'args' => array(
+                                       'failparam' => array(
+                                               'validate_callback' => function () {
+                                                       return new WP_Error( 'invalid', 'Invalid.', 'mydata' );
+                                               },
+                                       ),
+                               ),
+                       )
+               );
+
+               $valid = $this->request->has_valid_params();
+               $this->assertWPError( $valid );
+
+               $data = $valid->get_error_data();
+               $this->assertArrayHasKey( 'details', $data );
+               $this->assertArrayHasKey( 'failparam', $data['details'] );
+               $this->assertEquals(
+                       array(
+                               'code'    => 'invalid',
+                               'message' => 'Invalid.',
+                               'data'    => 'mydata',
+                       ),
+                       $data['details']['failparam']
+               );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         public function _return_wp_error_on_validate_callback() {
</span><span class="cx" style="display: block; padding: 0 10px">                return new WP_Error( 'some-error', 'This is not valid!' );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span></span></pre></div>
<a id="trunktestsphpunittestsrestapirestserverphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/rest-api/rest-server.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/rest-api/rest-server.php        2021-02-02 17:21:45 UTC (rev 50149)
+++ trunk/tests/phpunit/tests/rest-api/rest-server.php  2021-02-02 17:26:06 UTC (rev 50150)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -407,7 +407,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $message = 'Test error message for the API';
</span><span class="cx" style="display: block; padding: 0 10px">                $error   = new WP_Error( $code, $message );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $response = rest_get_server()->error_to_response( $error );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $response = rest_convert_error_to_response( $error );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->assertInstanceOf( 'WP_REST_Response', $response );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // Make sure we default to a 500 error.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -424,7 +424,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $message = 'Test error message for the API';
</span><span class="cx" style="display: block; padding: 0 10px">                $error   = new WP_Error( $code, $message, array( 'status' => 400 ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $response = rest_get_server()->error_to_response( $error );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $response = rest_convert_error_to_response( $error );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->assertInstanceOf( 'WP_REST_Response', $response );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSame( 400, $response->get_status() );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -443,7 +443,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $error    = new WP_Error( $code, $message, array( 'status' => 400 ) );
</span><span class="cx" style="display: block; padding: 0 10px">                $error->add( $code2, $message2, array( 'status' => 403 ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $response = rest_get_server()->error_to_response( $error );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $response = rest_convert_error_to_response( $error );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->assertInstanceOf( 'WP_REST_Response', $response );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSame( 400, $response->get_status() );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -456,6 +456,19 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSame( array( 'status' => 403 ), $error->error_data[ $code2 ] );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        /**
+        * @ticket 46191
+        */
+       public function test_error_to_response_with_additional_data() {
+               $error = new WP_Error( 'test', 'test', array( 'status' => 400 ) );
+               $error->add_data( 'more_data' );
+
+               $response = rest_convert_error_to_response( $error );
+               $this->assertSame( 400, $response->get_status() );
+               $this->assertEquals( 'more_data', $response->get_data()['data'] );
+               $this->assertEquals( array( array( 'status' => 400 ) ), $response->get_data()['additional_data'] );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         public function test_rest_error() {
</span><span class="cx" style="display: block; padding: 0 10px">                $data     = array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'code'    => 'wp-api-test-error',
</span></span></pre>
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