From f5de2fd5d7af1d67b7dea09659f8b037af7ddbab Mon Sep 17 00:00:00 2001
From: Moritz <mosum@google.com>
Date: Wed, 4 Sep 2024 09:28:05 +0200
Subject: [PATCH] Add test

---
 web/lib/src/helpers/extensions.dart |  6 ++++++
 web/test/helpers_test.dart          | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/web/lib/src/helpers/extensions.dart b/web/lib/src/helpers/extensions.dart
index 78612ce5..0efa81d9 100644
--- a/web/lib/src/helpers/extensions.dart
+++ b/web/lib/src/helpers/extensions.dart
@@ -104,6 +104,12 @@ extension TouchListConvert on TouchList {
   List<Touch> toList() => JSImmutableListWrapper<TouchList, Touch>(this);
 }
 
+/// Returns all response headers as a key-value map.
+///
+/// Multiple values for the same header key can be combined into one,
+/// separated by a comma and a space.
+///
+/// See: http://www.w3.org/TR/XMLHttpRequest/#the-getresponseheader()-method
 extension XMLHttpRequestGlue on XMLHttpRequest {
   Map<String, String> get responseHeaders {
     // from Closure's goog.net.Xhrio.getResponseHeaders.
diff --git a/web/test/helpers_test.dart b/web/test/helpers_test.dart
index aa419ac3..088d5138 100644
--- a/web/test/helpers_test.dart
+++ b/web/test/helpers_test.dart
@@ -36,4 +36,22 @@ void main() {
     // Ensure accessing any arbitrary item in the list does not throw.
     expect(() => dartList[0], returnsNormally);
   });
+
+  test('Headers to map', () async {
+    final request = XMLHttpRequest();
+    request.open('GET', 'www.google.com');
+    request.send();
+    await request.onLoad.first;
+
+    expect(
+      request.responseHeaders,
+      allOf(
+        containsPair('content-length', '10'),
+        containsPair('content-type', 'text/plain; charset=utf-8'),
+        containsPair('x-content-type-options', 'nosniff'),
+        containsPair('x-frame-options', 'SAMEORIGIN'),
+        containsPair('x-xss-protection', '1; mode=block'),
+      ),
+    );
+  });
 }