Loosen up type-safety for props

Author: eps1lon

types/index.d.ts

@@ -110,7 +110,7 @@ interface RenderHookOptions<Props> {
 
 // TODO JSDOC
 export function renderHook<Result, Props>(
-  render: (initialProps?: Props) => Result,
+  render: (initialProps: Props) => Result,
   options?: RenderHookOptions<Props>,
 ): RenderHookResult<Result, Props>
 

types/test.tsx

@@ -110,6 +110,19 @@ export function testRenderHook() {
   unmount()
 }
 
+export function testRenderHookProps() {
+  const {result, rerender, unmount} = renderHook(
+    ({defaultValue}) => React.useState(defaultValue)[0],
+    {initialProps: {defaultValue: 2}},
+  )
+
+  expectType<number, typeof result.current>(result.current)
+
+  rerender()
+
+  unmount()
+}
+
 /*
 eslint
   testing-library/prefer-explicit-assert: "off",