fix(pretty-format): support react 19

packages/pretty-format/package.json

@@ -38,6 +38,7 @@
   },
   "devDependencies": {
     "@types/react-is": "^18.3.0",
-    "react-is": "^18.3.1"
+    "react-is": "^18.3.1",
+    "react-is-19": "npm:react@19.0.0-rc-b01722d5-20241114"
   }
 }

packages/pretty-format/src/plugins/ReactElement.ts

@@ -6,14 +6,38 @@
  */
 
 import type { Config, NewPlugin, Printer, Refs } from '../types'
-import * as ReactIs from 'react-is'
+import * as ReactIs18 from 'react-is'
+// @ts-expect-error no type
+import * as ReactIs19 from 'react-is-19'
 import {
   printChildren,
   printElement,
   printElementAsLeaf,
   printProps,
 } from './lib/markup'
 
+const reactIsMethods = [
+  'isAsyncMode',
+  'isConcurrentMode',
+  'isContextConsumer',
+  'isContextProvider',
+  'isElement',
+  'isForwardRef',
+  'isFragment',
+  'isLazy',
+  'isMemo',
+  'isPortal',
+  'isProfiler',
+  'isStrictMode',
+  'isSuspense',
+  'isSuspenseList',
+  'isValidElementType',
+] as const
+
+const ReactIs: typeof ReactIs18 = Object.fromEntries(
+  reactIsMethods.map(m => [m, (v: any) => (ReactIs18 as any)[m](v) || ReactIs19[m](v)])
+) as any
+
 // Given element.props.children, or subtree during recursive traversal,
 // return flattened array of children.
 function getChildren(arg: unknown, children: Array<unknown> = []) {