From e79be47d2b81a677d0dd39d84328a38ca0f0ffc6 Mon Sep 17 00:00:00 2001
From: Ahn <27772165+ahnpnl@users.noreply.github.com>
Date: Sun, 11 Sep 2022 18:49:45 +0200
Subject: [PATCH] fix(legacy): include existing globals config in cached config
 (#3803)

When creating `ConfigSet` with migrated Jest config (to migrate from `globals` to transformer config), it is a must to also copy other globals config.
---
 src/legacy/ts-jest-transformer.ts | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/legacy/ts-jest-transformer.ts b/src/legacy/ts-jest-transformer.ts
index 235126db59..7f118434f7 100644
--- a/src/legacy/ts-jest-transformer.ts
+++ b/src/legacy/ts-jest-transformer.ts
@@ -109,17 +109,17 @@ export class TsJestTransformer implements SyncTransformer {
         if (config.globals?.['ts-jest']) {
           this._logger.warn(Deprecations.GlobalsTsJestConfigOption)
         }
-        configSet = this._createConfigSet(
-          this.tsJestConfig
-            ? {
-                ...config,
-                globals: {
-                  'ts-jest': this.tsJestConfig,
-                },
-              }
-            : config,
-        )
-        const jest = { ...config }
+        const migratedConfig = this.tsJestConfig
+          ? {
+              ...config,
+              globals: {
+                ...(config.globals ?? Object.create(null)),
+                'ts-jest': this.tsJestConfig,
+              },
+            }
+          : config
+        configSet = this._createConfigSet(migratedConfig)
+        const jest = { ...migratedConfig }
         // we need to remove some stuff from jest config
         // this which does not depend on config
         jest.cacheDirectory = undefined as any // eslint-disable-line @typescript-eslint/no-explicit-any