diff options
Diffstat (limited to 'js/src/jit-test/tests/wasm/arraybuffer-transfer.js')
-rw-r--r-- | js/src/jit-test/tests/wasm/arraybuffer-transfer.js | 35 |
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); |