all-caps style-mapping rule not understood

Hello

I tried using the following rule in my style-map but mammoth would not parse it.

all-caps => span.b-uppercase

I expect explicitly applied uppercasing to be mapped as

<span class="b-uppercase">{text}</span>

I received the following warning message:

Did not understand this style mapping, so ignored it: all-caps => span.b-uppercase

mammoth version: 1.4.12 Python version: 3.9.1 OS: Windows 10

[mwilliamson]

Ah, I should have paid attention to your original description: you’re using a version of Mammoth before support was added for all-caps.

[mwilliamson]

Could you upload the file, rather than copying and pasting it, to make sure that I’ve got the file exactly as you do?