From 23650473ea7f4b493f119ac9f8e403b165440242 Mon Sep 17 00:00:00 2001
From: Vladimir Sheremet <sleuths.slews0s@icloud.com>
Date: Sun, 31 Jul 2022 15:29:16 +0300
Subject: [PATCH] feat: don't reset modules with --no-isolate

---
 packages/vitest/src/runtime/entry.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/packages/vitest/src/runtime/entry.ts b/packages/vitest/src/runtime/entry.ts
index aab9c5d24105..62561c5d3b30 100644
--- a/packages/vitest/src/runtime/entry.ts
+++ b/packages/vitest/src/runtime/entry.ts
@@ -45,8 +45,13 @@ export async function run(files: string[], config: ResolvedConfig): Promise<void
 
     await withEnv(environment, config.environmentOptions || {}, async () => {
       for (const file of files) {
-        workerState.mockMap.clear()
-        resetModules(workerState.moduleCache, true)
+        // it doesn't matter if running with --threads
+        // if running with --no-threads, we usually want to reset everything before running a test
+        // but we have --isolate option to disable this
+        if (config.isolate) {
+          workerState.mockMap.clear()
+          resetModules(workerState.moduleCache, true)
+        }
 
         workerState.filepath = file