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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-runtime-semantics-classdefinitionevaluation
description: >
[[IsHTMLDDA]] object as superclass: `null` check uses strict equality.
IsConstructor check is performed before "prototype" lookup.
info: |
ClassDefinitionEvaluation
[...]
5. Else,
[...]
d. Let superclass be ? GetValue(superclassRef).
e. If superclass is null, then
[...]
f. Else if IsConstructor(superclass) is false, throw a TypeError exception.
features: [class, IsHTMLDDA]
---*/
var superclass = $262.IsHTMLDDA;
var prototypeGets = 0;
Object.defineProperty(superclass, "prototype", {
get: function() {
prototypeGets += 1;
},
});
assert.throws(TypeError, function() {
class C extends superclass {}
});
assert.sameValue(prototypeGets, 0);
reportCompare(0, 0);