From 4abb18b140f6c43f281228906cb09b48a4ee29ba Mon Sep 17 00:00:00 2001
From: Alan Agius <alanagius@google.com>
Date: Wed, 15 May 2024 15:07:05 +0000
Subject: [PATCH] fix(@angular-devkit/schematics):
 `SchematicTestRunner.runExternalSchematic` fails with "The encoded data was
 not valid for encoding utf-8"

When using Jest instanceof does not work correctly. See: https://github.com/jestjs/jest/issues/2549

Closes: #27643
---
 packages/angular_devkit/schematics/src/tree/host-tree.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/angular_devkit/schematics/src/tree/host-tree.ts b/packages/angular_devkit/schematics/src/tree/host-tree.ts
index c37d9d11027d..8c4b012d401d 100644
--- a/packages/angular_devkit/schematics/src/tree/host-tree.ts
+++ b/packages/angular_devkit/schematics/src/tree/host-tree.ts
@@ -304,7 +304,12 @@ export class HostTree implements Tree {
       // With the `fatal` option enabled, invalid data will throw a TypeError
       return decoder.decode(data);
     } catch (e) {
-      if (e instanceof TypeError) {
+      // The second part should not be needed. But Jest does not support instanceof correctly.
+      // See: https://github.com/jestjs/jest/issues/2549
+      if (
+        e instanceof TypeError ||
+        (e as NodeJS.ErrnoException).code === 'ERR_ENCODING_INVALID_ENCODED_DATA'
+      ) {
         throw new Error(`Failed to decode "${path}" as UTF-8 text.`);
       }
       throw e;