1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/non262/ReadableStream/shell.js b/js/src/tests/non262/ReadableStream/shell.js
new file mode 100644
index 0000000000..7e83ed2934
--- /dev/null
+++ b/js/src/tests/non262/ReadableStream/shell.js
@@ -0,0 +1,30 @@
+// Return a promise that will resolve to `undefined` the next time jobs are
+// processed.
+//
+// `ticks` indicates how long the promise should "wait" before resolving: a
+// promise created with `asyncSleep(n)` will become settled and fire its handlers
+// before a promise created with `asyncSleep(n+1)`.
+//
+function asyncSleep(ticks) {
+    let p = Promise.resolve();
+    if (ticks > 0) {
+        return p.then(() => asyncSleep(ticks - 1));
+    }
+    return p;
+}
+
+// Run the async function `test`. Wait for it to finish running. Throw if it
+// throws or if it fails to finish (awaiting a value forever).
+function runAsyncTest(test) {
+    let passed = false;
+    let problem = "test did not finish";
+    test()
+        .then(_ => { passed = true; })
+        .catch(exc => { problem = exc; });
+    drainJobQueue();
+    if (!passed) {
+        throw problem;
+    }
+
+    reportCompare(0, 0);
+}