1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/arraybuffer-transfer.js b/js/src/jit-test/tests/wasm/arraybuffer-transfer.js
new file mode 100644
index 0000000000..d82c305f2d
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/arraybuffer-transfer.js
@@ -0,0 +1,35 @@
+let exp = wasmEvalText(`(module
+    (memory 1)
+    (export "mem" (memory 0))
+    (func $f (result i32) (i32.load (i32.const 0)))
+    (export "zero" (func $f))
+)`).exports;
+
+const byteLength = 65536;
+let buffer = exp.mem.buffer;
+let i32 = new Int32Array(buffer);
+let zero = exp.zero;
+
+const magic = 0xbadf00d;
+
+assertEq(zero(), 0);
+assertEq(i32[0], 0);
+
+i32[0] = magic;
+
+assertEq(zero(), magic);
+assertEq(i32[0], magic);
+
+assertEq(buffer.detached, false);
+assertEq(buffer.byteLength, byteLength);
+
+// Can't transfer Wasm prepared array buffers.
+assertThrowsInstanceOf(() => buffer.transfer(), TypeError);
+
+// |buffer| is still attached.
+assertEq(buffer.detached, false);
+assertEq(buffer.byteLength, byteLength);
+
+// Access still returns the original value.
+assertEq(zero(), magic);
+assertEq(i32[0], magic);