mirror of https://github.com/tc39/test262.git
97 lines
2.5 KiB
JavaScript
97 lines
2.5 KiB
JavaScript
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// This file was procedurally generated from the following sources:
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// - src/function-forms/unscopables-with.case
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// - src/function-forms/default/func-expr.template
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/*---
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description: Symbol.unscopables behavior across scope boundaries (function expression)
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esid: sec-function-definitions-runtime-semantics-evaluation
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features: [globalThis, Symbol.unscopables]
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flags: [generated, noStrict]
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info: |
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FunctionExpression : function ( FormalParameters ) { FunctionBody }
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[...]
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3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
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scope, strict).
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[...]
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9.2.1 [[Call]] ( thisArgument, argumentsList)
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[...]
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7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
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[...]
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9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
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1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
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[...]
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9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
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[...]
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23. Let iteratorRecord be Record {[[iterator]]:
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CreateListIterator(argumentsList), [[done]]: false}.
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24. If hasDuplicates is true, then
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[...]
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25. Else,
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b. Let formalStatus be IteratorBindingInitialization for formals with
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iteratorRecord and env as arguments.
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[...]
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...
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Let envRec be lex's EnvironmentRecord.
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Let exists be ? envRec.HasBinding(name).
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HasBinding
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...
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If the withEnvironment flag of envRec is false, return true.
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Let unscopables be ? Get(bindings, @@unscopables).
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If Type(unscopables) is Object, then
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Let blocked be ToBoolean(? Get(unscopables, N)).
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If blocked is true, return false.
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(The `with` Statement) Runtime Semantics: Evaluation
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...
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Set the withEnvironment flag of newEnv’s EnvironmentRecord to true.
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...
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---*/
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let count = 0;
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var v = 1;
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globalThis[Symbol.unscopables] = {
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v: true,
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};
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{
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count++;
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var callCount = 0;
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// Stores a reference `ref` for case evaluation
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var ref;
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ref = function(x) {
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count++;
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with (globalThis) {
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count++;
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assert.sameValue(v, undefined, 'The value of `v` is expected to equal `undefined`');
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}
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count++;
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var v = x;
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with (globalThis) {
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count++;
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assert.sameValue(v, 10, 'The value of `v` is 10');
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v = 20;
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}
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assert.sameValue(v, 20, 'The value of `v` is 20');
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assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1');
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callCount = callCount + 1;
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};
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ref(10);
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assert.sameValue(callCount, 1, 'function invoked exactly once');
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count++;
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}
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assert.sameValue(count, 6, 'The value of `count` is 6');
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