Auto merge of #23206 - servo-wpt-sync:wpt_update_16-04-2019, r=servo-wpt-sync

Sync WPT with upstream (16-04-2019)

Automated downstream sync of changes from upstream as of 16-04-2019.
[no-wpt-sync]

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1 files changed, 50 insertions, 0 deletions

diff --git a/tests/wpt/web-platform-tests/FileAPI/blob/Blob-stream.any.js b/tests/wpt/web-platform-tests/FileAPI/blob/Blob-stream.any.js
new file mode 100644
index 00000000000..894f09f8ece
--- /dev/null
+++ b/tests/wpt/web-platform-tests/FileAPI/blob/Blob-stream.any.js
@@ -0,0 +1,50 @@
+// META: title=Blob Stream
+// META: script=../support/Blob.js
+'use strict';
+
+// Takes in a ReadableStream and reads from it until it is done, returning
+// an array that contains the results of each read operation
+async function read_all_chunks(stream) {
+  assert_true(stream instanceof ReadableStream);
+  assert_true('getReader' in stream);
+  const reader = stream.getReader();
+
+  assert_true('read' in reader);
+  let read_value = await reader.read();
+
+  let out = [];
+  let i = 0;
+  while (!read_value.done) {
+    for (let val of read_value.value) {
+      out[i++] = val;
+    }
+    read_value = await reader.read();
+  }
+  return out;
+}
+
+promise_test(async () => {
+  const blob = new Blob(["PASS"]);
+  const stream = await blob.stream()
+  const chunks = await read_all_chunks(stream);
+  for (let [index, value] of chunks.entries()) {
+    assert_equals(value, "PASS".charCodeAt(index));
+  }
+}, "Blob.stream()")
+
+promise_test(async () => {
+  const blob = new Blob();
+  const stream = await blob.stream()
+  const chunks = await read_all_chunks(stream);
+
+  assert_array_equals(chunks, []);
+}, "Blob.stream() empty Blob")
+
+promise_test(async () => {
+  const input_arr = [8, 241, 48, 123, 151];
+  const typed_arr = new Uint8Array(input_arr);
+  const blob = new Blob([typed_arr]);
+  const stream = await blob.stream()
+  const chunks = await read_all_chunks(stream);
+  assert_array_equals(chunks, input_arr)
+}, "Blob.stream() non-unicode input")