1 files changed, 15 insertions, 0 deletions
diff --git a/dom/streams/test/xpcshell/too-big-array-buffer.js b/dom/streams/test/xpcshell/too-big-array-buffer.js
new file mode 100644
index 0000000000..b80c36e813
--- /dev/null
+++ b/dom/streams/test/xpcshell/too-big-array-buffer.js
@@ -0,0 +1,15 @@
+add_task(async function helper() {
+  // Note: this test assumes the largest possible ArrayBuffer is
+  // smaller than 10GB -- if that changes, this test will fail.
+  let rs = new ReadableStream({
+    type: "bytes",
+    autoAllocateChunkSize: 10 * 1024 * 1024 * 1024,
+  });
+  let reader = rs.getReader();
+  try {
+    await reader.read();
+    Assert.equal(true, false, "Shouldn't succeed at reading");
+  } catch (e) {
+    Assert.equal(e instanceof RangeError, true, "Should throw RangeError");
+  }
+});