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-rw-r--r--js/src/jit-test/tests/ion/testPossiblyWrappedArrayBufferByteLength.js41
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..abbff59a6f
--- /dev/null
+++ b/js/src/jit-test/tests/ion/testPossiblyWrappedArrayBufferByteLength.js
@@ -0,0 +1,41 @@
+// |jit-test| --ion-warmup-threshold=50
+
+var PossiblyWrappedArrayBufferByteLength = getSelfHostedValue("PossiblyWrappedArrayBufferByteLength");
+
+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();