Update web-platform-tests to revision b464d69274950c7707855c0b29729d58b9a8d492

tests/wpt/web-platform-tests/compression/resources/concatenate-stream.js

@@ -0,0 +1,25 @@
+'use strict';
+
+// Read all the chunks from a stream that returns BufferSource objects and
+// concatenate them into a single Uint8Array.
+async function concatenateStream(readableStream) {
+  const reader = readableStream.getReader();
+  let totalSize = 0;
+  const buffers = [];
+  while (true) {
+    const { value, done } = await reader.read();
+    if (done) {
+      break;
+    }
+    buffers.push(value);
+    totalSize += value.byteLength;
+  }
+  reader.releaseLock();
+  const concatenated = new Uint8Array(totalSize);
+  let offset = 0;
+  for (const buffer of buffers) {
+    concatenated.set(buffer, offset);
+    offset += buffer.byteLength;
+  }
+  return concatenated;
+}