Blob.arrayBuffer returns uint8array (#7086)

2 files changed, 7 insertions, 1 deletions

diff --git a/cli/rt/20_blob.js b/cli/rt/20_blob.js
index 5b0ef349e..f7309dafb 100644
--- a/cli/rt/20_blob.js
+++ b/cli/rt/20_blob.js
@@ -151,7 +151,7 @@
           bytes.set(chunk, offs);
           offs += chunk.byteLength;
         }
-        return bytes;
+        return bytes.buffer;
       } else {
         throw new TypeError("Invalid reader result.");
       }
diff --git a/cli/tests/unit/blob_test.ts b/cli/tests/unit/blob_test.ts
index 79e6f1f8f..494c2ac75 100644
--- a/cli/tests/unit/blob_test.ts
+++ b/cli/tests/unit/blob_test.ts
@@ -91,6 +91,12 @@ unitTest(async function blobStream(): Promise<void> {
   assertEquals(decode(bytes), "Hello World");
 });
 
+unitTest(async function blobArrayBuffer(): Promise<void> {
+  const uint = new Uint8Array([102, 111, 111]);
+  const blob = new Blob([uint]);
+  assertEquals(await blob.arrayBuffer(), uint.buffer);
+});
+
 unitTest(function blobConstructorNameIsBlob(): void {
   const blob = new Blob();
   assertEquals(blob.constructor.name, "Blob");