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author | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-08-18 16:25:15 +0200 |
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committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-08-18 16:26:16 +0200 |
commit | 202296d02aa99afa90581333ab059c050b9c3ade (patch) | |
tree | 6ed8a1289bed1bb06d2703ea77cba5fccd3bdffa /js/src/tests/ecma_6/extensions/newer-type-functions-caller-arguments.js | |
parent | 1530f48c27fb13d7cbd2708c9f0fcf2dabc6ed6a (diff) | |
parent | ab6242a93b849b0a3c7525b16bc01dd3172fc167 (diff) | |
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Pull Basilisk-release forward.
Diffstat (limited to 'js/src/tests/ecma_6/extensions/newer-type-functions-caller-arguments.js')
-rw-r--r-- | js/src/tests/ecma_6/extensions/newer-type-functions-caller-arguments.js | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/extensions/newer-type-functions-caller-arguments.js b/js/src/tests/ecma_6/extensions/newer-type-functions-caller-arguments.js new file mode 100644 index 000000000..7fed18037 --- /dev/null +++ b/js/src/tests/ecma_6/extensions/newer-type-functions-caller-arguments.js @@ -0,0 +1,43 @@ +// Tests that newer-type functions (i.e. anything not defined by regular function declarations and +// expressions) throw when accessing their 'arguments' and 'caller' properties. + +// 9.2.7 (AddRestrictedFunctionProperties) defines accessors on Function.prototype which throw on +// every 'get' and 'set' of 'caller' and 'arguments'. +// Additionally, 16.2 (Forbidden Extensions) forbids adding properties to all non-"legacy" function +// declarations and expressions. This creates the effect that all newer-style functions act like +// strict-mode functions when accessing their 'caller' and 'arguments' properties. + +const container = { + async asyncMethod() {}, + *genMethod() {}, + method() {} +}; + +[ + async function(){}, + function*(){}, + () => {}, + async () => {}, + + container.asyncMethod, + container.genMethod, + container.method +].forEach(f => { + checkArgumentsAccess(f); + checkCallerAccess(f); +}); + +function checkArgumentsAccess(f) { + assertThrowsInstanceOf(() => f.arguments, TypeError, + `Expected 'arguments' property access to throw on ${f}`); +} + +function checkCallerAccess(f) { + assertThrowsInstanceOf(() => f.caller, TypeError, + `Expected 'caller' property access to throw on ${f}`); +} + +if (typeof reportCompare === "function") + reportCompare(true, true); + +print("Tests complete"); |