From ad42ca3c3e07972433d884268c0499e93b8b002d Mon Sep 17 00:00:00 2001
From: Sebastian Nemeth <sebastian@monkmage.com>
Date: Wed, 22 Jul 2020 16:53:21 +0300
Subject: [PATCH] fix(mapper): specs fail in win32 due to double slash notation

---
 src/config/getOsPath.spec.ts | 11 +++++++++++
 src/config/getOsPath.ts      |  9 +++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)
 create mode 100644 src/config/getOsPath.spec.ts

diff --git a/src/config/getOsPath.spec.ts b/src/config/getOsPath.spec.ts
new file mode 100644
index 0000000000..7392690af0
--- /dev/null
+++ b/src/config/getOsPath.spec.ts
@@ -0,0 +1,11 @@
+import { getWinPath } from './getOsPath'
+
+describe('getWinPath', () => {
+  it('returns win32 paths on windows', () => {
+    const input = `C:\\\\Users\\travis\\build\\kulshekhar\\ts-jest\\src\\config\\__helpers__\\project-1`
+
+    expect(getWinPath(input)).toMatchInlineSnapshot(
+      `"C:\\\\\\\\Users\\\\\\\\travis\\\\\\\\build\\\\\\\\kulshekhar\\\\\\\\ts-jest\\\\\\\\src\\\\\\\\config\\\\\\\\__helpers__\\\\\\\\project-1"`,
+    )
+  })
+})
diff --git a/src/config/getOsPath.ts b/src/config/getOsPath.ts
index 6f12159251..c98b7bd409 100644
--- a/src/config/getOsPath.ts
+++ b/src/config/getOsPath.ts
@@ -1,7 +1,12 @@
 import * as path from 'path'
 
-export const getOsPath = (...paths: string[]): string => {
+const MatchWinSeparator = /(?<!\\)(\\)(?!\\)/gm
+
+export const getWinPath = (...paths: string[]): string => {
   const joinedPath = path.join(...paths)
 
-  return process.platform === 'win32' ? joinedPath.replace('\\', '\\\\') : joinedPath
+  return joinedPath.replace(MatchWinSeparator, '\\\\')
 }
+
+export const getOsPath = (...paths: string[]): string =>
+  process.platform === 'win32' ? getWinPath(...paths) : path.join(...paths)