Would prefer to generate these at runtime than have it checked in as it's easier to see the test file in the test code than open another file. Something like:

$emptyValueCsv = @'
a1""a3
v1"v2"v3
'@

Set-Content testdrive:/EmptyValue.csv -Value $emptyValueCsv

I looked into using a here-string earlier, but the lack of indentation for the string terminator made the code look quite messy.

I couldn't quite find an elegant way to add the here-string, but I've gone an added one for the different file contents.

This formatting seems off, lines 33-38 have one extra indentation. Also, it's nice to align the semicolons in the hashtable per row to make them easier to read

Turns out those lines had tabs as indentation, instead of spaces like the rest of the lines.

Usualy we do this in BeforeAll block. Then we could pass only file name to the block.

Having it in BeforeAll makes sense if multiple tests use the same test content, but in this case only this test uses them so I think it's ok to just have it here closer to the test code.