From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- .../jit-test/tests/basic/error-stack-accessors.js | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 js/src/jit-test/tests/basic/error-stack-accessors.js (limited to 'js/src/jit-test/tests/basic/error-stack-accessors.js') diff --git a/js/src/jit-test/tests/basic/error-stack-accessors.js b/js/src/jit-test/tests/basic/error-stack-accessors.js new file mode 100644 index 000000000..9bbcae14b --- /dev/null +++ b/js/src/jit-test/tests/basic/error-stack-accessors.js @@ -0,0 +1,31 @@ +// Test the Error.prototype.stack getter/setter with various "fun" edge cases. + +load(libdir + "asserts.js"); + +// Stack should be accessible in subclasses. The accessor should walk up the +// prototype chain. +assertEq(typeof Object.create(Error()).stack, "string"); +assertEq(Object.create(Error.prototype).stack, ""); + +// Stack should be overridable in subclasses. +{ + let myError = Object.create(Error()); + myError.stack = 5; + assertEq(myError.stack, 5); + + let myOtherError = Object.create(Error.prototype); + myOtherError.stack = 2; + assertEq(myOtherError.stack, 2); +} + +// Should throw when there is no Error in the `this` object's prototype chain. +var obj = Object.create(null); +var desc = Object.getOwnPropertyDescriptor(Error.prototype, "stack"); +Object.defineProperty(obj, "stack", desc); +assertThrowsInstanceOf(() => obj.stack, TypeError); + +// Should throw with non-object `this` values. +assertThrowsInstanceOf(desc.set, TypeError); +assertThrowsInstanceOf(desc.set.bind("string"), TypeError); +assertThrowsInstanceOf(desc.get, TypeError); +assertThrowsInstanceOf(desc.get.bind("string"), TypeError); -- cgit v1.2.3