Function assert_same_behavior

test/fixtures/wpt/wasm/jsapi/js-string/basic.any.js:135–162

(funcA, funcB, ...params)

// A helper function to assert that the behavior of two functions are the
// same.
function assert_same_behavior(funcA, funcB, ...params) {
  let resultA;
  let errA = null;
  try {
    resultA = funcA(...params);
  } catch (err) {
    errA = err;
  }

  let resultB;
  let errB = null;
  try {
    resultB = funcB(...params);
  } catch (err) {
    errB = err;
  }

  if (errA || errB) {
    assert_equals(errA === null, errB === null, errA ? errA.message : errB.message);
    assert_equals(Object.getPrototypeOf(errA), Object.getPrototypeOf(errB));
  }
  assert_equals(resultA, resultB);

  if (errA) {
    throw errA;
  }
  return resultA;
}

function assert_throws_if(func, shouldThrow, constructor) {
  let error = null;