1 files changed, 23 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fetch/content-length/api-and-duplicate-headers.any.js b/testing/web-platform/tests/fetch/content-length/api-and-duplicate-headers.any.js
new file mode 100644
index 0000000000..8015289f8d
--- /dev/null
+++ b/testing/web-platform/tests/fetch/content-length/api-and-duplicate-headers.any.js
@@ -0,0 +1,23 @@
+promise_test(async t => {
+  const response = await fetch("resources/identical-duplicates.asis");
+  assert_equals(response.statusText, "BLAH");
+  assert_equals(response.headers.get("test"), "x, x");
+  assert_equals(response.headers.get("content-type"), "text/plain, text/plain");
+  assert_equals(response.headers.get("content-length"), "6, 6");
+  const text = await response.text();
+  assert_equals(text, "Test.\n");
+}, "fetch() and duplicate Content-Length/Content-Type headers");
+
+async_test(t => {
+  const xhr = new XMLHttpRequest();
+  xhr.open("GET", "resources/identical-duplicates.asis");
+  xhr.send();
+  xhr.onload = t.step_func_done(() => {
+    assert_equals(xhr.statusText, "BLAH");
+    assert_equals(xhr.getResponseHeader("test"), "x, x");
+    assert_equals(xhr.getResponseHeader("content-type"), "text/plain, text/plain");
+    assert_equals(xhr.getResponseHeader("content-length"), "6, 6");
+    assert_equals(xhr.getAllResponseHeaders(), "content-length: 6, 6\r\ncontent-type: text/plain, text/plain\r\ntest: x, x\r\n");
+    assert_equals(xhr.responseText, "Test.\n");
+  });
+}, "XMLHttpRequest and duplicate Content-Length/Content-Type headers");