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Diffstat (limited to 'js/src/tests/test262/language/statements/for-in/scope-head-var-none.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-in/scope-head-var-none.js | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-in/scope-head-var-none.js b/js/src/tests/test262/language/statements/for-in/scope-head-var-none.js new file mode 100644 index 0000000000..d0536483b3 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-in/scope-head-var-none.js @@ -0,0 +1,47 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +description: > + No variable environment is created for the statement "head" +info: | + IterationStatement : for ( ForDeclaration of AssignmentExpression ) Statement + + 1. Let keyResult be the result of performing ? + ForIn/OfHeadEvaluation(BoundNames of ForDeclaration, + AssignmentExpression, iterate). + [...] + + 13.7.5.12 Runtime Semantics: ForIn/OfHeadEvaluation + + [...] + 2. If TDZnames is not an empty List, then + a. Assert: TDZnames has no duplicate entries. + b. Let TDZ be NewDeclarativeEnvironment(oldEnv). + c. Let TDZEnvRec be TDZ's EnvironmentRecord. + d. For each string name in TDZnames, do + i. Perform ! TDZEnvRec.CreateMutableBinding(name, false). + e. Set the running execution context's LexicalEnvironment to TDZ. + 3. Let exprRef be the result of evaluating expr. + [...] +flags: [noStrict] +---*/ + +var probeBefore = function() { return x; }; +var x = 1; +var probeDecl, probeExpr, probeBody; + +for ( + let [_ = probeDecl = function() { return x; }] + in + { '': (eval('var x = 2;'), probeExpr = function() { return x; }) } + ) + probeBody = function() { return x; }; + +assert.sameValue(probeBefore(), 2, 'reference preceding statement'); +assert.sameValue(probeDecl(), 2, 'reference from ForDeclaration'); +assert.sameValue(probeExpr(), 2, 'reference from AssignmentExpression'); +assert.sameValue(probeBody(), 2, 'reference from statement body'); +assert.sameValue(x, 2, 'reference following statement'); + +reportCompare(0, 0); |