Test transformation, need helpful error for invalid XSLT

MI-DPLA / combine

Combine /kämˌbīn/ - Metadata Aggregator Platform

MIT License

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Test transformation, need helpful error for invalid XSLT #165

Closed ghukill closed 6 years ago

ghukill commented 6 years ago

When invalid XSLT is loaded from a pre-existing transformation, or pasted, the error in the testing window is unhelpful (just a generic NoneType has no method transform).

Need to bubble up that XSLT could not be parsed.

ghukill commented 6 years ago

Done.