gecko-dev/dom/promise/tests/test_webassembly_compile_worker.js

const sampleURL = 'test_webassembly_compile_sample.wasm';
const sampleExportName = 'run';
const sampleResult = 1275;

function checkSampleModule(m) {
  if (!(m instanceof WebAssembly.Module))
    throw "not a module";
  var i = new WebAssembly.Instance(m);
  if (!(i instanceof WebAssembly.Instance))
    throw "not an instance";
  if (i.exports[sampleExportName]() !== sampleResult)
    throw "wrong result";
}

function checkSampleInstance(i) {
  if (!(i instanceof WebAssembly.Instance))
    throw "not an instance";
  if (i.exports[sampleExportName]() !== sampleResult)
    throw "wrong result";
}

const initObj = { headers: { 'Content-Type' : 'application/wasm' } };

onmessage = e => {
  WebAssembly.compile(e.data)
  .then(m => checkSampleModule(m))
  .then(() => WebAssembly.instantiate(e.data))
  .then(({module,instance}) => { checkSampleModule(module), checkSampleInstance(instance) })
  .then(() => WebAssembly.compileStreaming(new Response(e.data, initObj)))
  .then(m => checkSampleModule(m))
  .then(() => WebAssembly.instantiateStreaming(new Response(e.data, initObj)))
  .then(({module,instance}) => { checkSampleModule(module), checkSampleInstance(instance) })
  .then(() => WebAssembly.compileStreaming(fetch(sampleURL)))
  .then(m => checkSampleModule(m))
  .then(() => WebAssembly.instantiateStreaming(fetch(sampleURL)))
  .then(({module,instance}) => { checkSampleModule(module), checkSampleInstance(instance) })
  .then(() => postMessage("ok"))
  .catch(err => postMessage("fail: " + err));
}