From 26b1810168ebbd7043b18d12815ed014f80c6f81 Mon Sep 17 00:00:00 2001
From: Kar Rui Lau <karrui.lau@gmail.com>
Date: Thu, 3 Dec 2020 22:18:24 +0800
Subject: [PATCH] fix(temp): use isolatedModules in ts-jest

`isolatedModules` being set to true will fix a memory leak in ts-jest. However, type checking will not be performed whilst running tests (will still have type checking when writing tests).

Revert after the memory leak is fixed.
See https://github.com/kulshekhar/ts-jest/issues/1967
See: https://kulshekhar.github.io/ts-jest/user/config/isolatedModules
---
 jest.config.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/jest.config.js b/jest.config.js
index 31005a6586..4f33c3d8c0 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -12,4 +12,11 @@ module.exports = {
       statements: 38, // Increase this percentage as test coverage improves
     },
   },
+  globals: {
+    // Revert when memory leak in ts-jest is fixed.
+    // See https://github.com/kulshekhar/ts-jest/issues/1967.
+    'ts-jest': {
+      isolatedModules: true,
+    },
+  },
 }