TestCafé seems to fail on Chrome 109

[ArnoldSmith86]

These are the tests that differ:

var results.957 = toLocaleLowerCase '' 0.1 ${PROPERTY arr} 0 <empty string>
var results.958 = toLocaleLowerCase '' 0.1 {} 0 <empty string>
var results.959 = toLocaleLowerCase '' 0.1 ${PROPERTY obj} 0 <empty string>
var results.960 = toLocaleLowerCase '' '' 0 0 <empty string>
var results.961 = toLocaleLowerCase '' '' 1 0 <empty string>
var results.962 = toLocaleLowerCase '' '' ${obj.12} 0 <empty string>
var results.963 = toLocaleLowerCase '' '' 0.1 0 <empty string>
var results.964 = toLocaleLowerCase '' '' '' 0 <empty string>
var results.965 = toLocaleLowerCase '' '' '0' 0 <empty string>
var results.966 = toLocaleLowerCase '' '' ${str} 0 <empty string>
var results.967 = toLocaleLowerCase '' '' true 0 <empty string>
var results.968 = toLocaleLowerCase '' '' ${obj.$str} 0 <empty string>
var results.969 = toLocaleLowerCase '' '' null 0 <empty string>
var results.970 = toLocaleLowerCase '' '' // 0 <empty string>
var results.971 = toLocaleLowerCase '' '' [] 0 <empty string>
var results.987 = toLocaleLowerCase '' '0' ${PROPERTY arr} 0 <empty string>
var results.988 = toLocaleLowerCase '' '0' {} 0 <empty string>
var results.989 = toLocaleLowerCase '' '0' ${PROPERTY obj} 0 <empty string>
var results.990 = toLocaleLowerCase '' ${str} 0 0 <empty string>
var results.991 = toLocaleLowerCase '' ${str} 1 0 <empty string>
var results.992 = toLocaleLowerCase '' ${str} ${obj.12} 0 <empty string>
var results.993 = toLocaleLowerCase '' ${str} 0.1 0 <empty string>
var results.994 = toLocaleLowerCase '' ${str} '' 0 <empty string>
var results.995 = toLocaleLowerCase '' ${str} '0' 0 <empty string>
var results.996 = toLocaleLowerCase '' ${str} ${str} 0 <empty string>
var results.997 = toLocaleLowerCase '' ${str} true 0 <empty string>
var results.998 = toLocaleLowerCase '' ${str} ${obj.$str} 0 <empty string>
var results.999 = toLocaleLowerCase '' ${str} null 0 <empty string>
var results.1000 = toLocaleLowerCase '' ${str} // 0 <empty string>
var results.1001 = toLocaleLowerCase '' ${str} [] 0 <empty string>
var results.1032 = toLocaleLowerCase '' ${obj.$str} ${PROPERTY arr} 0 <empty string>
var results.1033 = toLocaleLowerCase '' ${obj.$str} {} 0 <empty string>
var results.1034 = toLocaleLowerCase '' ${obj.$str} ${PROPERTY obj} 0 <empty string>
var results.1035 = toLocaleLowerCase '' null 0 0 <empty string>
var results.1036 = toLocaleLowerCase '' null 1 0 <empty string>
var results.1037 = toLocaleLowerCase '' null ${obj.12} 0 <empty string>
var results.1038 = toLocaleLowerCase '' null 0.1 0 <empty string>
var results.1039 = toLocaleLowerCase '' null '' 0 <empty string>
var results.1040 = toLocaleLowerCase '' null '0' 0 <empty string>
var results.1041 = toLocaleLowerCase '' null ${str} 0 <empty string>
var results.1042 = toLocaleLowerCase '' null true 0 <empty string>
var results.1043 = toLocaleLowerCase '' null ${obj.$str} 0 <empty string>
var results.1044 = toLocaleLowerCase '' null null 0 <empty string>
var results.1045 = toLocaleLowerCase '' null // 0 <empty string>
var results.1046 = toLocaleLowerCase '' null [] 0 <empty string>
var results.1077 = toLocaleLowerCase '' [] ${PROPERTY arr} 0 <empty string>
var results.1078 = toLocaleLowerCase '' [] {} 0 <empty string>
var results.1079 = toLocaleLowerCase '' [] ${PROPERTY obj} 0 <empty string>
var results.1080 = toLocaleLowerCase '' ${PROPERTY arr} 0 0 <empty string>
var results.1081 = toLocaleLowerCase '' ${PROPERTY arr} 1 0 <empty string>
var results.1082 = toLocaleLowerCase '' ${PROPERTY arr} ${obj.12} 0 <empty string>
var results.1083 = toLocaleLowerCase '' ${PROPERTY arr} 0.1 0 <empty string>
var results.1084 = toLocaleLowerCase '' ${PROPERTY arr} '' 0 <empty string>
var results.1085 = toLocaleLowerCase '' ${PROPERTY arr} '0' 0 <empty string>
var results.1086 = toLocaleLowerCase '' ${PROPERTY arr} ${str} 0 <empty string>
var results.1087 = toLocaleLowerCase '' ${PROPERTY arr} true 0 <empty string>
var results.1088 = toLocaleLowerCase '' ${PROPERTY arr} ${obj.$str} 0 <empty string>
var results.1089 = toLocaleLowerCase '' ${PROPERTY arr} null 0 <empty string>
var results.1090 = toLocaleLowerCase '' ${PROPERTY arr} // 0 <empty string>
var results.1091 = toLocaleLowerCase '' ${PROPERTY arr} [] 0 <empty string>

The last one (<empty string>) is the result I get from Chromium 109 on Linux. The one before that (0) is the result of Firefox 103 on Linux (and has to be what Chromium 108 did). The rest is the command TestCafé uses in the clickRoutine.

[ArnoldSmith86]

OK, the 0 is something we set in widget.js when catching an exception. So the difference is:

Chrome 109:

Firefox (and Chrome 108):

Apparently somebody added a shortcut for handling empty strings (it does throw an exception if the initial string isn't empty) before checking that the locale is valid.

[ArnoldSmith86]

The fact that ''.toLocaleUpperCase('') behaves differently makes me pretty confident that this will be fixed in Chromium:

[flackr]

I bisected this to the chromium commit which introduced the change and filed as crbug.com/1409058. Safari does not throw an error for ''.toLocaleLowerCase('') or ''.toLocaleUpperCase(''), filed https://bugs.webkit.org/show_bug.cgi?id=250903 for this.