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* Improve test coverage for `super` keyword Add tests for SuperCall and SuperProperty, organized together in the `test/language/expressions/super/` directory. For SuperProperty, include tests for usage from within Object initializers and class bodies because a different set of semantics are observable from each context.
51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-super-keyword
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es6id: 12.3.5
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description: >
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SuperProperty evaluation when "this" binding has not been initialized
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info: |
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1. Let propertyKey be StringValue of IdentifierName.
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2. If the code matched by the syntactic production that is being evaluated is
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strict mode code, let strict be true, else let strict be false.
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3. Return ? MakeSuperPropertyReference(propertyKey, strict).
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12.3.5.3 Runtime Semantics: MakeSuperPropertyReference
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1. Let env be GetThisEnvironment( ).
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2. If env.HasSuperBinding() is false, throw a ReferenceError exception.
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3. Let actualThis be ? env.GetThisBinding().
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8.1.1.3.4 GetThisBinding
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1. Let envRec be the function Environment Record for which the method was
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invoked.
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2. Assert: envRec.[[ThisBindingStatus]] is not "lexical".
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3. If envRec.[[ThisBindingStatus]] is "uninitialized", throw a ReferenceError
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exception.
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features: [class]
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---*/
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var caught;
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class C extends Object {
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constructor() {
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try {
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super.x;
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} catch (err) {
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caught = err;
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}
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}
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}
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// When the "construct" invocation completes and the "this" value is
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// uninitialized, the specification dictates that a ReferenceError must be
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// thrown. That behavior is tested elsewhere, so the error is ignored (if it is
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// produced at all).
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try {
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new C();
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} catch (_) {}
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assert.sameValue(typeof caught, 'object');
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assert.sameValue(caught.constructor, ReferenceError);
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