From 7264c137114b6dd895624e3476dd7ec57b64ee13 Mon Sep 17 00:00:00 2001
From: Ahn <anhpnnd@gmail.com>
Date: Mon, 26 Oct 2020 08:02:04 +0100
Subject: [PATCH] fix(compiler): only exclude test files when initializing
 compiler (#2062)

Closes #2061
---
 .../custom-typings/__tests__/index.test.ts             | 10 +++++++---
 e2e/__external-repos__/custom-typings/global.ts        |  1 +
 src/compiler/language-service.ts                       |  2 +-
 3 files changed, 9 insertions(+), 4 deletions(-)
 create mode 100644 e2e/__external-repos__/custom-typings/global.ts

diff --git a/e2e/__external-repos__/custom-typings/__tests__/index.test.ts b/e2e/__external-repos__/custom-typings/__tests__/index.test.ts
index 725366c4b1..89b1ee87db 100644
--- a/e2e/__external-repos__/custom-typings/__tests__/index.test.ts
+++ b/e2e/__external-repos__/custom-typings/__tests__/index.test.ts
@@ -1,9 +1,13 @@
-import $ from "jquery"
-
 function foo() {
     $.ajax<number>("/foo")
 }
 
-test("foo", () => {
+test('foo', () => {
   expect(2).toBe(2)
 })
+
+test('bar', () => {
+  const terminateReason: TerminatedReason = 'culled'
+
+  expect(terminateReason).toEqual('culled')
+})
diff --git a/e2e/__external-repos__/custom-typings/global.ts b/e2e/__external-repos__/custom-typings/global.ts
new file mode 100644
index 0000000000..64e8d50c0e
--- /dev/null
+++ b/e2e/__external-repos__/custom-typings/global.ts
@@ -0,0 +1 @@
+type TerminatedReason = 'culled' | 'died' | 'transferred'
diff --git a/src/compiler/language-service.ts b/src/compiler/language-service.ts
index 6528670bef..7dfacebe25 100644
--- a/src/compiler/language-service.ts
+++ b/src/compiler/language-service.ts
@@ -75,7 +75,7 @@ export const initializeLanguageServiceInstance = (configs: ConfigSet, logger: Lo
   }
   // Initialize memory cache for typescript compiler
   configs.parsedTsConfig.fileNames
-    .filter((fileName) => fileName.endsWith('.d.ts'))
+    .filter((fileName) => !configs.isTestFile(fileName))
     .forEach((fileName) => {
       memoryCache.files.set(fileName, {
         version: 0,