Ticket #59601: 59601.diff

tests/phpunit/includes/spy-rest-server.php

@@ -25 +25 @@
          * @return mixed
          */
         public function __call( $method, $args ) {
+                if ( ! method_exists( $this, $method ) ) {
+                        throw new \Error( sprintf( 'Call to undefined method %s::%s', get_class( $this ), $method ) );
+                }
                 return call_user_func_array( array( $this, $method ), $args );
         }
 

tests/phpunit/tests/rest-api.php

@@ -2537 +2537 @@
 
                 $this->assertTrue( $registered );
         }
+
+        public function test_rest_get_server_fails_with_undefined_method() {
+                $this->expectException( \Error::class );
+                rest_get_server()->does_not_exist();
+        }
 }