From c131b89ec589cbd21334e482ecf57e3f5a9c996d Mon Sep 17 00:00:00 2001
From: Vladimir Sheremet <sheremet.va@icloud.com>
Date: Fri, 10 Jun 2022 17:18:56 +0300
Subject: [PATCH] fix: null inside test.each is not turned into an empty array

---
 packages/vitest/src/runtime/suite.ts | 6 +++---
 test/core/test/each.test.ts          | 7 +++++++
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/packages/vitest/src/runtime/suite.ts b/packages/vitest/src/runtime/suite.ts
index b309dacc5eba..99d8b394339e 100644
--- a/packages/vitest/src/runtime/suite.ts
+++ b/packages/vitest/src/runtime/suite.ts
@@ -1,6 +1,6 @@
 import { format } from 'util'
 import type { File, RunMode, Suite, SuiteAPI, SuiteCollector, SuiteFactory, SuiteHooks, Task, Test, TestAPI, TestFunction } from '../types'
-import { isObject, noop, toArray } from '../utils'
+import { isObject, noop } from '../utils'
 import { createChainable } from './chain'
 import { collectTask, collectorContext, createTestContext, runWithSuite, withTimeout } from './context'
 import { getHooks, setFn, setHooks } from './map'
@@ -167,7 +167,7 @@ function createSuite() {
   suite.each = <T>(cases: ReadonlyArray<T>) => {
     return (name: string, fn: (...args: T[]) => void) => {
       cases.forEach((i, idx) => {
-        const items = toArray(i) as any
+        const items = Array.isArray(i) ? i : [i]
         suite(formatTitle(name, items, idx), () => fn(...items))
       })
     }
@@ -195,7 +195,7 @@ function createTest(fn: (
   test.each = <T>(cases: ReadonlyArray<T>) => {
     return (name: string, fn: (...args: T[]) => void) => {
       cases.forEach((i, idx) => {
-        const items = toArray(i) as any
+        const items = Array.isArray(i) ? i : [i]
         test(formatTitle(name, items, idx), () => fn(...items))
       })
     }
diff --git a/test/core/test/each.test.ts b/test/core/test/each.test.ts
index b9a44f87ac18..8b38517e919a 100644
--- a/test/core/test/each.test.ts
+++ b/test/core/test/each.test.ts
@@ -8,6 +8,13 @@ test.each([
   expect(a + b).toBe(expected)
 })
 
+test.each([
+  null,
+  [null],
+])('null is null', (value) => {
+  expect(value).toBe(null)
+})
+
 test.each([
   ['string', true],
   ['string', false],