My dataset source is an sdf but this can be done with any reader source FME can read.
I had to use a few transformers to filter the attribute names of the feature layer.
1. First of all you need to use a Sampler to make sure you end up with one single feature instead of the complete dataset.
2. Once you filtered a single feature you use an attributeexploder to aquire the feature's fme attribute names.
3. Next I added a Tester to verify the expected attribute names.
4. I added the result to a list using the listbuilder
5. I used a ListCounter to get the amount of passed tests.
6. I will verify the amount of passed tests against the amount of expected attribute names within the dataset.
7. The failed results are written to a text file using a TEXTWRITER
Voila, thats how you verify whether the expected amount of columns are part of your dataset using FME.
The result can be downloaded here
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