GSoC: Standardize tolerance levels for TestBlackBodySimpleSource

[abhayrajjais01]

📝 Description

Type: 🧹 Refactor

Summary:
This PR standardizes the tolerance levels in TestBlackBodySimpleSource and TestBlackBodySimpleSourceRel by making the implicit default tolerance explicit. It introduces a module-level constant RELATIVE_TOLERANCE_BLACKBODY = 1e-7 and updates all assert_allclose calls to use atol=0 and rtol=RELATIVE_TOLERANCE_BLACKBODY.

Why this matters

Previously, all 8 test assertions used numpy.testing.assert_allclose() without explicit tolerance parameters, relying on numpy's default rtol=1e-7. Making tolerances explicit is the first step toward standardizing them across the codebase, as seen in other modules like test_sdec_plot.py.

Current Tolerance Landscape (Context)

I analyzed the current state of tolerances across the codebase to inform this change:

Module	Tolerance	File
BlackBody Sources	rtol=1e-7 (explicit)	test_blackbody_sources.py
SDEC Plot	rtol=1e-12	test_sdec_plot.py
LIV Plot	rtol=1e-12	test_liv_plot.py
Monte Carlo Loop	rtol=1e-13	test_montecarlo_main_loop.py
Continuum	rtol=1e-13	test_continuum.py

Future Work

• Identify if 1e-7 can be tightened to match the 1e-12 standard used in visualization tests.
• Standardize other transport modules (test_montecarlo_main_loop.py, test_continuum.py) to use module-level constants.

🚦 Testing

• Verified syntax correctness with ast.parse().
• Verified that the new constant RELATIVE_TOLERANCE_BLACKBODY is correctly applied to all 8 assertions.
• Existing tests should pass as the tolerance value 1e-7 matches the previous implicit default.

☑️ Checklist

• I requested two reviewers for this pull request
• I have disclosed AI/LLM usage (see below)

AI/LLM Disclosure

• AI Tool Used: Google Gemini 2.0 Flash (via Antigravity agent)
• Usage: Assisted in analyzing the codebase to identify implicit tolerances
• Verification: I have personally reviewed all code changes and verified they are correct and follow TARDIS standards.

[tardis-bot]

👋 Welcome @abhayrajjais01! Thank you for your first contribution to this repository!

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Please mark the pull request as draft if you are not ready for review yet or if there are things you will be adding.

[tardis-bot]

*beep* *bop*
Hi human,
I ran ruff on the latest commit (3682b34).
Here are the outputs produced.
Results can also be downloaded as artifacts here.
Summarised output:

Details

538	    	syntax-error
1	W291	trailing-whitespace
Found 539 errors.

Complete output(might be large):

Details

All checks passed!

[abhayrajjais01]

hii @atharva-2001
i have fixed the failing tests, let me know if you want me to do any further changes