JSTests/test262/test/language/statements/class/definition/methods.js

// Copyright (C) 2014 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 14.5
description: >
    class methods
---*/
function assertMethodDescriptor(object, name) {
  var desc = Object.getOwnPropertyDescriptor(object, name);
  assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`");
  assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`");
  assert.sameValue(desc.writable, true, "The value of `desc.writable` is `true`");
  assert.sameValue(typeof desc.value, 'function', "`typeof desc.value` is `'function'`");
  assert.sameValue('prototype' in desc.value, false, "The result of `'prototype' in desc.value` is `false`");
}

class C {
  method() { return 1; }
  static staticMethod() { return 2; }
  method2() { return 3; }
  static staticMethod2() { return 4; }
}

assertMethodDescriptor(C.prototype, 'method');
assertMethodDescriptor(C.prototype, 'method2');
assertMethodDescriptor(C, 'staticMethod');
assertMethodDescriptor(C, 'staticMethod2');

assert.sameValue(new C().method(), 1, "`new C().method()` returns `1`. Defined as `method() { return 1; }`");
assert.sameValue(C.staticMethod(), 2, "`C.staticMethod()` returns `2`. Defined as `static staticMethod() { return 2; }`");
assert.sameValue(new C().method2(), 3, "`new C().method2()` returns `3`. Defined as `method2() { return 3; }`");
assert.sameValue(C.staticMethod2(), 4, "`C.staticMethod2()` returns `4`. Defined as `static staticMethod2() { return 4; }`");