1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/testPossiblyWrappedArrayBufferByteLength.js b/js/src/jit-test/tests/ion/testPossiblyWrappedArrayBufferByteLength.js
new file mode 100644
index 0000000000..ef41f89c8b
--- /dev/null
+++ b/js/src/jit-test/tests/ion/testPossiblyWrappedArrayBufferByteLength.js
@@ -0,0 +1,41 @@
+var PossiblyWrappedArrayBufferByteLength = getSelfHostedValue("PossiblyWrappedArrayBufferByteLength");
+
+setJitCompilerOption("ion.warmup.trigger", 50);
+
+function testBasic() {
+  var arr = [1, 2, 3];
+  var tarr = new Int32Array(arr);
+  var abuf = tarr.buffer;
+
+  var arrLength = arr.length;
+  var bytesPerElement = Int32Array.BYTES_PER_ELEMENT;
+
+  var f = function() {
+    assertEq(PossiblyWrappedArrayBufferByteLength(abuf), arrLength * bytesPerElement);
+  };
+  do {
+    f();
+  } while (!inIon());
+}
+testBasic();
+
+function testWrapped() {
+  var g = newGlobal();
+g.eval(`
+var arr = [1, 2, 3];
+var tarr = new Int32Array(arr);
+var abuf = tarr.buffer;
+`);
+
+  var abuf = g.abuf;
+  var arrLength = g.arr.length;
+  var bytesPerElement = g.Int32Array.BYTES_PER_ELEMENT;
+
+  var f = function() {
+    assertEq(PossiblyWrappedArrayBufferByteLength(abuf), arrLength * bytesPerElement);
+  };
+  do {
+    f();
+  } while (!inIon());
+}
+testWrapped();