test: diagram generator comparison tests #745
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Add FORM routines for comparing the diagram generator with QGRAF and FeynGraph: http://cefema-gt.tecnico.ulisboa.pt/~paulo/qgraf.html https://jens-braun.github.io/FeynGraph/
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This PR assumes the following PRs (but not included here yet):
The latter may not be needed depending on how we treat the cache files.
This PR introduces tests for comparing the diagram generator with QGRAF. The core routines also support FeynGraph, which could be helpful when we implement and test vacuum diagrams in the future (#485). For now, the test cases in the file cover only simple 1-loop diagrams and compare them with QGRAF.
The code contains two
#pipepreprocessor instructions. One checks whether a cache file exists (see also #240). The other checks the FeynGraph version, for which I couldn't find any way to get it from the result using a Jinja template.Open questions:
check,check/extraorcheck/diagrams)checkThe
CanonicalizeDiagramsprocedure may perform better if spectators are used in a smarter way.