diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/with/unscopables-not-referenced-for-undef.js')
-rw-r--r-- | js/src/tests/test262/language/statements/with/unscopables-not-referenced-for-undef.js | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/with/unscopables-not-referenced-for-undef.js b/js/src/tests/test262/language/statements/with/unscopables-not-referenced-for-undef.js new file mode 100644 index 0000000000..961593f60d --- /dev/null +++ b/js/src/tests/test262/language/statements/with/unscopables-not-referenced-for-undef.js @@ -0,0 +1,47 @@ +// Copyright 2015 Mike Pennisi. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-getidentifierreference +es6id: 8.1.2.1 +description: > + `Symbol.unscopables` is not referenced when environment record does not have + requested property +info: | + [...] + 2. Let envRec be lex's EnvironmentRecord. + 3. Let exists be ? envRec.HasBinding(name). + + 8.1.1.2.1 HasBinding + + 1. Let envRec be the object Environment Record for which the method was + invoked. + 2. Let bindings be the binding object for envRec. + 3. Let foundBinding be ? HasProperty(bindings, N). + 4. If foundBinding is false, return false. + + 13.11.7 (The `with` Statement) Runtime Semantics: Evaluation + + [...] + 5. Set the withEnvironment flag of newEnv’s EnvironmentRecord to true. + [...] +flags: [noStrict] +features: [Symbol.unscopables] +---*/ + +var x = 0; +var env = {}; +var callCount = 0; +Object.defineProperty(env, Symbol.unscopables, { + get: function() { + callCount += 1; + } +}); + +with (env) { + x; +} + +assert.sameValue(callCount, 0); + +reportCompare(0, 0); |