fix: types for EachFunction are missing awaitable return (fix: #1181) (…

…#1182)

packages/vitest/src/types/tasks.ts

@@ -86,15 +86,15 @@ type ExtractEachCallbackArgs<T extends ReadonlyArray<any>> = {
 interface EachFunction {
   <T extends any[] | [any]>(cases: ReadonlyArray<T>): (
     name: string,
-    fn: (...args: T) => void
+    fn: (...args: T) => Awaitable<void>
   ) => void
   <T extends ReadonlyArray<any>>(cases: ReadonlyArray<T>): (
     name: string,
-    fn: (...args: ExtractEachCallbackArgs<T>) => void
+    fn: (...args: ExtractEachCallbackArgs<T>) => Awaitable<void>
   ) => void
   <T>(cases: ReadonlyArray<T>): (
     name: string,
-    fn: (...args: T[]) => void
+    fn: (...args: T[]) => Awaitable<void>
   ) => void
 }
 

test/core/test/each.test.ts

@@ -83,3 +83,17 @@ test.each([
 ])('the index of the test case is %#', (a, b, expected) => {
   expect(a + b).toBe(expected)
 })
+
+test.each([
+  [1, 2, 3],
+  [4, 5, 9],
+])('return a promise like result %#', async(a, b, expected) => {
+  const promiseResolver = (first: number, second: number) => {
+    return new Promise((resolve) => {
+      setTimeout(() => resolve(first + second), 1)
+    })
+  }
+
+  const result = await promiseResolver(a, b)
+  expect(result).toBe(expected)
+})