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Diffstat (limited to 'js/src/tests/test262/annexB/language/statements/class/subclass/superclass-emulates-undefined.js')
-rw-r--r-- | js/src/tests/test262/annexB/language/statements/class/subclass/superclass-emulates-undefined.js | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/language/statements/class/subclass/superclass-emulates-undefined.js b/js/src/tests/test262/annexB/language/statements/class/subclass/superclass-emulates-undefined.js new file mode 100644 index 0000000000..245e7d402b --- /dev/null +++ b/js/src/tests/test262/annexB/language/statements/class/subclass/superclass-emulates-undefined.js @@ -0,0 +1,35 @@ +// 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); |