1 files changed, 31 insertions, 0 deletions
diff --git a/testing/web-platform/tests/xhr/request-content-length.any.js b/testing/web-platform/tests/xhr/request-content-length.any.js
new file mode 100644
index 0000000000..054d2cce9d
--- /dev/null
+++ b/testing/web-platform/tests/xhr/request-content-length.any.js
@@ -0,0 +1,31 @@
+async_test(test => {
+  const client = new XMLHttpRequest();
+  const data = "This is 22 bytes long.";
+  let happened = false;
+  client.upload.onprogress = test.step_func(e => {
+    assert_true(e.lengthComputable);
+    assert_equals(e.total, data.length);
+    happened = true;
+  });
+  client.onload = test.step_func_done(() => {
+    assert_true(happened);
+    assert_true(client.responseText.includes(`Content-Length: ${data.length}`));
+  });
+  client.open("POST", "resources/echo-headers.py");
+  client.send(data);
+}, "Uploads need to set the Content-Length header");
+
+async_test(test => {
+  const client = new XMLHttpRequest();
+  const data = "blah";
+  const url = URL.createObjectURL(new Blob([data]));
+  client.open("GET", url);
+  client.send();
+  client.onload = test.step_func_done(e => {
+    assert_true(e.lengthComputable);
+    assert_equals(e.total, data.length);
+    assert_equals(e.loaded, data.length);
+    assert_equals(client.responseText, data);
+    assert_equals(client.getResponseHeader("Content-Length"), String(data.length));
+  });
+}, "Fetched blob: URLs set the Content-Length header");