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[math/RF] Reduce test failures when ROOT is built without clad or gsl #20027

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[math/RF] Reduce test failures when ROOT is built without clad or gsl #20027

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When working with ROOT where some features were off, I encountered test failures. These commits reduce some of those, namely:

  • Add fallbacks to other RooFit backends when clad is off. The tests continue to run also with the numeric backend.
  • When selecting an unsupported algorithm in RootFinder, throw an exception instead of crashing.

@hageboeck hageboeck self-assigned this Oct 3, 2025
guitargeek
guitargeek requested changes Oct 3, 2025
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Thanks for fixing this! I only have one request about the tutorial

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github-actions bot commented Oct 3, 2025 •
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Test Results

    22 files      22 suites   3d 21h 11m 57s ⏱️
 3 691 tests  3 686 ✅ 0 💤 5 ❌
79 253 runs  79 248 ✅ 0 💤 5 ❌

For more details on these failures, see this check.

Results for commit 9aa6423.

♻️ This comment has been updated with latest results.

guitargeek
guitargeek approved these changes Oct 3, 2025
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Thanks! LGTM

@hageboeck hageboeck requested a review from guitargeek October 3, 2025 13:42
vgvassilev
vgvassilev reviewed Oct 7, 2025
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@hageboeck hageboeck requested a review from guitargeek October 8, 2025 16:13
guitargeek
guitargeek approved these changes Oct 8, 2025
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Thank you! It makes sense to have a clear error and a fallback instead of a crash

hageboeck and others added 5 commits October 10, 2025 10:58
@hageboeck
[RF] Make testRooMulti independent of clad.
cc2ec30 
When clad is off, the tests were failing. With the standard backend,
they run fine, though.
All backends are tested in parametrised tests, so testRooMulti can be
made independent of any backend.
@hageboeck @guitargeek
[RF] Make tutorial r619 runnable without clad.
4f76fe9 
Also fix a warning that protects from a Gaussian with sigma=0.

Co-authored-by: Jonas Rembser <[email protected]>
@hageboeck
[math] Throw exception when RootFinder is constructed with invalid algo.
97213fb 
When MathMore cannot be loaded, the tutorial exampleFunction.py used to
crash. Here, a throw is added to the constructor, which is caught in the
Python tutorial.
@hageboeck
[tutorials] Apply ruff suggestions to exampleFunction.py
99cce7a
@hageboeck
[RF] Add fallback to RooFit's EvalBackend when built without clad.
9aa6423
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@guitargeek guitargeek guitargeek approved these changes

@couet couet Awaiting requested review from couet couet is a code owner

@lmoneta lmoneta Awaiting requested review from lmoneta lmoneta is a code owner

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@hageboeck @vgvassilev @guitargeek