JSTests/test262/test/language/computed-property-names/class/method/number.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: 12.2.5
description: >
    computed property class method names can be a number
includes: [compareArray.js]
---*/

function ID(x) {
  return x;
}

class C {
  a() { return 'A'; }
  [1]() { return 'B'; }
  c() { return 'C'; }
  [ID(2)]() { return 'D'; }
}
assert.sameValue(new C().a(), 'A', "`new C().a()` returns `'A'`, from `a() { return 'A'; }`");
assert.sameValue(new C()[1](), 'B', "`new C()[1]()` returns `'B'`, from `[1]() { return 'B'; }`");
assert.sameValue(new C().c(), 'C', "`new C().c()` returns `'C'`, from `c() { return 'C'; }`");
assert.sameValue(new C()[2](), 'D', "`new C()[2]()` returns `'D'`, from `[ID(2)]() { return 'D'; }`");

assert.sameValue(Object.keys(C.prototype).length, 0, "No enum keys from C.prototype");

assert(
  compareArray(Object.getOwnPropertyNames(C.prototype), ['1', '2', 'constructor', 'a', 'c']),
  "`compareArray(Object.getOwnPropertyNames(C.prototype), ['1', '2', 'constructor', 'a', 'c'])` returns `true`"
);