1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/tests/non262/ReadableStream/basic-push.js b/js/src/tests/non262/ReadableStream/basic-push.js
new file mode 100644
index 0000000000..65bb29880d
--- /dev/null
+++ b/js/src/tests/non262/ReadableStream/basic-push.js
@@ -0,0 +1,53 @@
+// |reftest| skip-if(!this.ReadableStream||!this.drainJobQueue)
+
+if ("ignoreUnhandledRejections" in this) {
+  ignoreUnhandledRejections();
+}
+
+// Example of a stream that enqueues data asynchronously, whether the reader
+// wants it or not, the "push" model.
+let fbStream = new ReadableStream({
+    start(controller) {
+        simulatePacketsDriftingIn(controller);
+    },
+});
+
+async function simulatePacketsDriftingIn(controller) {
+    for (let i = 1; i <= 30; i++) {
+        let importantData =
+            (i % 15 == 0 ? "FizzBuzz" :
+             i % 5 == 0 ? "Buzz":
+             i % 3 == 0 ? "Fizz" :
+             String(i));
+        controller.enqueue(importantData);
+        await asyncSleep(1 + i % 7);
+    }
+    controller.close();
+}
+
+const expected = [
+    "1", "2", "Fizz", "4", "Buzz", "Fizz", "7", "8", "Fizz", "Buzz",
+    "11", "Fizz", "13", "14", "FizzBuzz", "16", "17", "Fizz", "19", "Buzz",
+    "Fizz", "22", "23", "Fizz", "Buzz", "26", "Fizz", "28", "29", "FizzBuzz"
+];
+
+async function test() {
+    assertEq(fbStream.locked, false);
+    let reader = fbStream.getReader();
+    assertEq(fbStream.locked, true);
+
+    let results = [];
+    while (true) {
+        let r = await reader.read();
+        if (r.done) {
+            break;
+        }
+        results.push(r.value);
+    }
+
+    assertEq(results.join("-"), expected.join("-"));
+    reader.releaseLock();
+    assertEq(fbStream.locked, false);
+}
+
+runAsyncTest(test);