From 907935c382f4a35c5a186eb2a49162b1e1ea5b12 Mon Sep 17 00:00:00 2001
From: Andrew Bradley <cspotcode@gmail.com>
Date: Wed, 13 May 2020 01:13:23 -0400
Subject: [PATCH] Normalize paths when looking up items on outputCache (#1038)

* Normalize paths when looking up items on outputCache

* Tweak tests to be absolutely sure sourcemaps are working
---
 src/index.spec.ts |  6 +--
 src/index.ts      |  2 +-
 tests/throw.ts    | 97 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 101 insertions(+), 4 deletions(-)

diff --git a/src/index.spec.ts b/src/index.spec.ts
index 0d41f65d2..064f42ee0 100644
--- a/src/index.spec.ts
+++ b/src/index.spec.ts
@@ -189,7 +189,7 @@ describe('ts-node', function () {
         }
 
         expect(err.message).to.contain([
-          `${join(__dirname, '../tests/throw.ts')}:3`,
+          `${join(__dirname, '../tests/throw.ts')}:100`,
           '  bar () { throw new Error(\'this is a demo\') }',
           '                 ^',
           'Error: this is a demo'
@@ -206,7 +206,7 @@ describe('ts-node', function () {
         }
 
         expect(err.message).to.contain([
-          `${join(__dirname, '../tests/throw.ts')}:3`,
+          `${join(__dirname, '../tests/throw.ts')}:100`,
           '  bar () { throw new Error(\'this is a demo\') }',
           '                 ^'
         ].join('\n'))
@@ -611,7 +611,7 @@ describe('ts-node', function () {
       } catch (error) {
         expect(error.stack).to.contain([
           'Error: this is a demo',
-          `    at Foo.bar (${join(__dirname, '../tests/throw.ts')}:3:18)`
+          `    at Foo.bar (${join(__dirname, '../tests/throw.ts')}:100:18)`
         ].join('\n'))
 
         done()
diff --git a/src/index.ts b/src/index.ts
index e37442a90..9ee508ad4 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -420,7 +420,7 @@ export function create (rawOptions: CreateOptions = {}): Register {
   sourceMapSupport.install({
     environment: 'node',
     retrieveFile (path: string) {
-      return outputCache.get(path)?.content || ''
+      return outputCache.get(normalizeSlashes(path))?.content || ''
     }
   })
 
diff --git a/tests/throw.ts b/tests/throw.ts
index 1183d9ff5..dbd4cbc2e 100644
--- a/tests/throw.ts
+++ b/tests/throw.ts
@@ -1,4 +1,101 @@
+// intentional whitespace to prove that sourcemaps are working.  Throw should happen on line 100.
+// 100 lines is meant to be far more space than the helper functions would take.
 class Foo {
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   constructor () { this.bar() }
   bar () { throw new Error('this is a demo') }
 }