chore: Adjust jest environment conditionally for OS (#37452)

Co-authored-by: LekoArts <[email protected]>

jest.environment.ts

@@ -1,4 +1,7 @@
 const NodeEnvironment = require(`jest-environment-node`).TestEnvironment
+const fsExtra = require(`fs-extra`)
+
+const isWindows = process.platform === `win32`
 
 class CustomEnvironment extends NodeEnvironment {
   constructor(config, context) {
@@ -10,10 +13,23 @@ class CustomEnvironment extends NodeEnvironment {
     // this prevent dangling open handles that sometimes cause problems
     // particularly in windows tests (failures to move or delete a db file)
     if (this.global.__GATSBY_OPEN_ROOT_LMDBS) {
-      for (const rootDb of this.global.__GATSBY_OPEN_ROOT_LMDBS.values()) {
-        await rootDb.clearAsync()
-        await rootDb.close()
+      if (isWindows) {
+        for (const rootDb of this.global.__GATSBY_OPEN_ROOT_LMDBS.values()) {
+          await rootDb.clearAsync()
+          await rootDb.close()
+        }
+      } else {
+        for (const [
+          dbPath,
+          rootDb,
+        ] of this.global.__GATSBY_OPEN_ROOT_LMDBS.entries()) {
+          if (rootDb.isOperational()) {
+            await rootDb.close()
+          }
+          await fsExtra.remove(dbPath)
+        }
       }
+
       this.global.__GATSBY_OPEN_ROOT_LMDBS = undefined
     }
     await super.teardown()