From 1573f487cbab86573014ade6ed7f48f9c9f45c74 Mon Sep 17 00:00:00 2001
From: taile <1112264.lptai@gmail.com>
Date: Tue, 14 Dec 2021 17:29:24 +0700
Subject: [PATCH] Issue #417: Should not return empty string so that it is
 compatible with babel

---
 packages/vue2-jest/lib/transformers/typescript.js | 3 +--
 packages/vue3-jest/lib/transformers/typescript.js | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/packages/vue2-jest/lib/transformers/typescript.js b/packages/vue2-jest/lib/transformers/typescript.js
index f32fa454..22f6b3b9 100644
--- a/packages/vue2-jest/lib/transformers/typescript.js
+++ b/packages/vue2-jest/lib/transformers/typescript.js
@@ -21,8 +21,7 @@ module.exports = scriptLang => ({
 
     res.outputText = stripInlineSourceMap(res.outputText)
 
-    const inputSourceMap =
-      res.sourceMapText !== undefined ? JSON.parse(res.sourceMapText) : ''
+    const inputSourceMap = res.sourceMapText && JSON.parse(res.sourceMapText)
 
     const customTransformer =
       getCustomTransformer(vueJestConfig['transform'], 'js') || {}
diff --git a/packages/vue3-jest/lib/transformers/typescript.js b/packages/vue3-jest/lib/transformers/typescript.js
index 1aa2b656..275cc75f 100644
--- a/packages/vue3-jest/lib/transformers/typescript.js
+++ b/packages/vue3-jest/lib/transformers/typescript.js
@@ -21,8 +21,7 @@ module.exports = {
 
     res.outputText = stripInlineSourceMap(res.outputText)
 
-    const inputSourceMap =
-      res.sourceMapText !== undefined ? JSON.parse(res.sourceMapText) : ''
+    const inputSourceMap = res.sourceMapText && JSON.parse(res.sourceMapText)
 
     const customTransformer =
       getCustomTransformer(vueJestConfig['transform'], 'js') || {}