Bug 250618 – window.atob() returns wrong value when given a string container only white spaces

• Status: RESOLVED
• Resolution: INVALID
• Component: New Bugs

[Ahmad Saleem]

Hi Team,

While going through Blink's commit, I came across another failing test:

Blink Commit - https://chromium.googlesource.com/chromium/blink/+/4a9564e53be4b85ac10a463b3dac03f59b7cba18

WebKit Source - https://searchfox.org/wubkat/source/Source/WTF/wtf/text/Base64.cpp#192

Just wanted to raise so if needed, we can fix it. Will tag others to get input.

Thanks!

[Ahmad Saleem]

Test - https://jsfiddle.net/2q73Lwf4/show

Failing (in STP161 & Firefox Nightly 111):

FAIL window.btoa() should throw TypeError: Failed to execute 'btoa' on 'Window': 1 argument required, but only 0 present.. Threw exception TypeError: Not enough arguments.

FAIL window.atob() should throw TypeError: Failed to execute 'atob' on 'Window': 1 argument required, but only 0 present.. Threw exception TypeError: Not enough arguments.

______

Chrome Canary 111 passes all.

[Karl Dubost]

All the tests pass in https://wpt.fyi/results/html/webappapis/atob/base64.any.html?label=experimental&label=master&aligned

The Fiddle test is wrong. It is trying to test the full error message.
https://jsfiddle.net/2q73Lwf4/show


Safari TP 161
typeerror: Not enough arguments

Firefox Nightly 110
Uncaught TypeError: Window.atob: At least 1 argument required, but only 0 passed

Chrome Canary 111
Uncaught TypeError: Failed to execute 'atob' on 'Window': 1 argument required, but only 0 present.


They all throw with TypeError with window.atob()

and they all return the empty string '' for window.atob("            ")