Function CheckInstance

deps/v8/test/mjsunit/wasm/instantiate-module-basic.js:22–57

(instance)

})();

function CheckInstance(instance) {
  assertFalse(instance === undefined);
  assertFalse(instance === null);
  assertFalse(instance === 0);
  assertEquals('object', typeof instance);

  // Check the exports object is frozen.
  assertFalse(Object.isExtensible(instance.exports));
  assertTrue(Object.isFrozen(instance.exports));

  // Check the memory is WebAssembly.Memory.
  var mem = instance.exports.memory;
  assertFalse(mem === undefined);
  assertFalse(mem === null);
  assertFalse(mem === 0);
  assertEquals('object', typeof mem);
  assertTrue(mem instanceof WebAssembly.Memory);
  var buf = mem.buffer;
  assertTrue(buf instanceof ArrayBuffer);
  assertEquals(65536, buf.byteLength);
  for (var i = 0; i < 4; i++) {
    instance.exports.memory = 0;  // should be ignored
    mem.buffer = 0;               // should be ignored
    assertSame(mem, instance.exports.memory);
    assertSame(buf, mem.buffer);
  }

  // Check the properties of the main function.
  let main = instance.exports.main;
  assertFalse(main === undefined);
  assertFalse(main === null);
  assertFalse(main === 0);
  assertEquals('function', typeof main);

  assertEquals(kReturnValue, main());
}

// Official API
(function BasicJSAPITest() {