[Webkit-unassigned] [Bug 94688] New: Layout test fast/js/toString-overrides.html should expect TypeError when toLocaleString is overwritten

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=94688

           Summary: Layout test fast/js/toString-overrides.html should
                    expect TypeError when toLocaleString is overwritten
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ulan at chromium.org
                CC: porten at kde.org
        Depends on: 4147


Layout test fast/js/toString-overrides.html has the following test cases:

> Number.prototype.toLocaleString = "invalid";
> shouldBe("[1].toLocaleString()", "'1'");
> RegExp.prototype.toLocaleString = "invalid";
> shouldBe("[/r/].toLocaleString()", "'toString2'");

According to ECMA 262/15.4.4.3, both calls to "toLocaleString()" should throw TypeError because steps 8.a, 8.b of the spec algorithm state:

> 8.a Let func be the result of calling the [[Get]] internal method of elementObj with argument "toLocaleString".
> 8.b If IsCallable(func) is false, throw a TypeError exception.

String "invalid" is not callable.

Both Chrome and Firefox throw TypeError in these cases:

> FAIL [1].toLocaleString() should be 1. Threw exception TypeError: Property 'toLocaleString' of object toString is not a function
> FAIL [/r/].toLocaleString() should be toString2. Threw exception TypeError: Property 'toLocaleString' of object toString2 is not a function

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