1 files changed, 73 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/typedarray/resizable-typedarray-intrinsic-byteOffset.js b/js/src/jit-test/tests/typedarray/resizable-typedarray-intrinsic-byteOffset.js
new file mode 100644
index 0000000000..1b9f9a28e7
--- /dev/null
+++ b/js/src/jit-test/tests/typedarray/resizable-typedarray-intrinsic-byteOffset.js
@@ -0,0 +1,73 @@
+// |jit-test| --enable-arraybuffer-resizable; skip-if: !ArrayBuffer.prototype.resize
+
+const TypedArrayByteOffset = getSelfHostedValue("TypedArrayByteOffset");
+
+function testTypedArrayByteOffset() {
+  let ab = new ArrayBuffer(100, {maxByteLength: 100});
+  let typedArrays = [
+    new Int8Array(ab),
+    new Int8Array(ab, 1),
+    new Int8Array(ab, 2),
+    new Int8Array(ab, 3),
+  ];
+
+  for (let i = 0; i < 200; ++i) {
+    let ta = typedArrays[i & 3];
+    assertEq(TypedArrayByteOffset(ta), i & 3);
+  }
+}
+testTypedArrayByteOffset();
+
+function testTypedArrayByteOffsetOutOfBounds() {
+  let ab = new ArrayBuffer(100, {maxByteLength: 100});
+  let typedArrays = [
+    new Int8Array(ab, 0, 10),
+    new Int8Array(ab, 1, 10),
+    new Int8Array(ab, 2, 10),
+    new Int8Array(ab, 3, 10),
+  ];
+
+  // Resize to zero to make all views out-of-bounds.
+  ab.resize(0);
+
+  for (let i = 0; i < 200; ++i) {
+    let ta = typedArrays[i & 3];
+    assertEq(TypedArrayByteOffset(ta), i & 3);
+  }
+}
+testTypedArrayByteOffsetOutOfBounds();
+
+function testTypedArrayByteOffsetDetached() {
+  let ab = new ArrayBuffer(100, {maxByteLength: 100});
+  let typedArrays = [
+    new Int8Array(ab, 0, 10),
+    new Int8Array(ab, 1, 10),
+    new Int8Array(ab, 2, 10),
+    new Int8Array(ab, 3, 10),
+  ];
+
+  // Detach the buffer.
+  ab.transfer();
+
+  for (let i = 0; i < 200; ++i) {
+    let ta = typedArrays[i & 3];
+    assertEq(TypedArrayByteOffset(ta), 0);
+  }
+}
+testTypedArrayByteOffsetDetached();
+
+function testTypedArrayByteOffsetWithShared() {
+  let ab = new SharedArrayBuffer(100, {maxByteLength: 100});
+  let typedArrays = [
+    new Int8Array(ab),
+    new Int8Array(ab, 1),
+    new Int8Array(ab, 2),
+    new Int8Array(ab, 3),
+  ];
+
+  for (let i = 0; i < 200; ++i) {
+    let ta = typedArrays[i & 3];
+    assertEq(TypedArrayByteOffset(ta), i & 3);
+  }
+}
+testTypedArrayByteOffsetWithShared();