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author | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-11-10 11:39:27 +0100 |
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committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-11-10 11:39:27 +0100 |
commit | 974a481d12bf430891725bd3662876358e57e11a (patch) | |
tree | cad011151456251fef2f1b8d02ef4b4e45fad61a /js/src/tests/ecma_6/extensions/newer-type-functions-caller-arguments.js | |
parent | 6bd66b1728eeddb058066edda740aaeb2ceaec23 (diff) | |
parent | 736d25cbec4541186ed46c935c117ce4d1c7f3bb (diff) | |
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Merge branch 'master' into js-modules
# Conflicts:
# modules/libpref/init/all.js
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"); |