From df3f2b50eb92777a8a2b3872fd9eb7512d3f4c94 Mon Sep 17 00:00:00 2001
From: Anthony Fu <anthonyfu117@hotmail.com>
Date: Tue, 11 Apr 2023 09:54:43 +0200
Subject: [PATCH] fix(snapshot): normalize EOL for `toMatchFileSnapshot`
 (#3164)

---
 packages/snapshot/src/port/state.ts | 7 +++++++
 packages/snapshot/src/port/utils.ts | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/snapshot/src/port/state.ts b/packages/snapshot/src/port/state.ts
index a872c64bc105..f766f0e52642 100644
--- a/packages/snapshot/src/port/state.ts
+++ b/packages/snapshot/src/port/state.ts
@@ -18,6 +18,7 @@ import {
   addExtraLineBreaks,
   getSnapshotData,
   keyToTestName,
+  normalizeNewlines,
   prepareExpected,
   removeExtraLineBreaks,
   saveSnapshotFile,
@@ -244,6 +245,12 @@ export default class SnapshotState {
     if (!rawSnapshot)
       receivedSerialized = addExtraLineBreaks(receivedSerialized)
 
+    if (rawSnapshot) {
+      // normalize EOL when snapshot contains CRLF but received is LF
+      if (rawSnapshot.content && rawSnapshot.content.match(/\r\n/) && !receivedSerialized.match(/\r\n/))
+        rawSnapshot.content = normalizeNewlines(rawSnapshot.content)
+    }
+
     const expected = isInline
       ? inlineSnapshot
       : rawSnapshot
diff --git a/packages/snapshot/src/port/utils.ts b/packages/snapshot/src/port/utils.ts
index a3f7cff2708e..522f11604866 100644
--- a/packages/snapshot/src/port/utils.ts
+++ b/packages/snapshot/src/port/utils.ts
@@ -135,7 +135,7 @@ export async function ensureDirectoryExists(environment: SnapshotEnvironment, fi
   catch { }
 }
 
-function normalizeNewlines(string: string) {
+export function normalizeNewlines(string: string) {
   return string.replace(/\r\n|\r/g, '\n')
 }