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tests(JupyROOT): add notebook + unit tests for TColor.DefinedColors (fixes #20018); add verify script
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Lines changed: 372 additions & 1 deletion

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‎roottest/python/JupyROOT/CMakeLists.txt‎

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Original file line numberDiff line numberDiff line change
@@ -15,7 +15,8 @@ set(NOTEBOOKS importROOT.ipynb
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simpleCppMagic.ipynb
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thread_local.ipynb
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ROOT_kernel.ipynb
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tpython.ipynb)
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tpython.ipynb
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tcolor_definedcolors.ipynb)
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# Test all modules with doctest. All new tests will be automatically picked up
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file(GLOB pyfiles ${MODULES_LOCATION}/*.py)

‎roottest/python/JupyROOT/tcolor_definedcolors.ipynb‎

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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "b8ef0e09",
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"metadata": {},
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"outputs": [],
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"source": [
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"import ROOT"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "ac871508",
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"metadata": {},
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"outputs": [],
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"source": [
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"ROOT.TColor.DefinedColors(1)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "4800d2c7",
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"metadata": {},
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"outputs": [],
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"source": [
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"c = ROOT.TCanvas(\"c\", \"Basic ROOT Plot\", 800, 600)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "f3900d8a",
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"metadata": {},
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"outputs": [],
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"source": [
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"h = ROOT.TH1F(\"h\", \"Example Histogram;X axis;Entries\", 100, 0, 10)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "d83cc9da",
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"metadata": {},
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"outputs": [],
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"source": [
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"for _ in range(10000):\n",
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" h.Fill(ROOT.gRandom.Gaus(5, 1))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "1df7d032",
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"metadata": {},
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"outputs": [],
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"source": [
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"h.Draw()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "3743fddc",
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"metadata": {},
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"outputs": [],
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"source": [
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"c.Draw()"
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]
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}
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],
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"metadata": {
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"language_info": {
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"name": "python"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}

‎roottest/python/JupyROOT/test_tcolor_metadata.py‎

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#!/usr/bin/env python3
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"""
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Test script to verify that TColor.DefinedColors works correctly in Jupyter-like environments.
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This test verifies the fix for issue #20018.
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"""
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import sys
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def test_tcolor_metadata_preservation():
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"""
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Test that TColor.__init__ preserves metadata after pythonization.
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This ensures that introspection-heavy environments like Jupyter can
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properly inspect the method.
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"""
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import ROOT
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# Check that __init__ has the expected attributes from functools.wraps
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assert hasattr(ROOT.TColor.__init__, '__wrapped__'), \
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"TColor.__init__ should have __wrapped__ attribute from functools.wraps"
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# Check that __name__ is preserved
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assert hasattr(ROOT.TColor.__init__, '__name__'), \
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"TColor.__init__ should have __name__ attribute"
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# Check that __doc__ is preserved
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assert hasattr(ROOT.TColor.__init__, '__doc__'), \
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"TColor.__init__ should have __doc__ attribute"
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print("Metadata preservation test: PASSED")
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return True
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def test_tcolor_definedcolors():
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"""
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Test the original issue: TColor.DefinedColors(1) should work without errors.
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"""
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import ROOT
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try:
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# This was the problematic call in Jupyter notebooks
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result = ROOT.TColor.DefinedColors(1)
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print(f"TColor.DefinedColors(1) returned: {result}")
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print("DefinedColors test: PASSED")
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return True
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except Exception as e:
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print(f"TColor.DefinedColors(1) failed with error: {e}")
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print("DefinedColors test: FAILED")
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return False
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def test_tcolor_full_workflow():
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"""
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Test the full workflow from the original issue report.
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"""
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import ROOT
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try:
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# Create a canvas
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ROOT.TColor.DefinedColors(1)
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c = ROOT.TCanvas("c", "Basic ROOT Plot", 800, 600)
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# Create a histogram with 100 bins from 0 to 10
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h = ROOT.TH1F("h", "Example Histogram;X axis;Entries", 100, 0, 10)
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# Fill histogram with random Gaussian numbers
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for _ in range(10000):
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h.Fill(ROOT.gRandom.Gaus(5, 1))
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# Draw the histogram
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h.Draw()
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# Draw canvas
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c.Draw()
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print("Full workflow test: PASSED")
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return True
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except Exception as e:
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print(f"Full workflow test failed with error: {e}")
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print("Full workflow test: FAILED")
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return False
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def main():
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"""
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Run all tests and return exit code.
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"""
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print("=" * 60)
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print("Testing TColor metadata preservation fix for issue #20018")
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print("=" * 60)
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tests = [
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test_tcolor_metadata_preservation,
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test_tcolor_definedcolors,
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test_tcolor_full_workflow
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]
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results = []
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for test in tests:
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print(f"\nRunning {test.__name__}...")
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try:
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result = test()
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results.append(result)
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except Exception as e:
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print(f"Test {test.__name__} raised exception: {e}")
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results.append(False)
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print("\n" + "=" * 60)
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print(f"Test Results: {sum(results)}/{len(results)} passed")
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print("=" * 60)
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return 0 if all(results) else 1
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if __name__ == "__main__":
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sys.exit(main())

‎roottest/python/JupyROOT/verify_fix.py‎

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#!/usr/bin/env python3
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"""
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Verification script to analyze the TColor fix for issue #20018.
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This script examines the fix without needing to run ROOT.
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"""
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import os
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import re
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def verify_fix():
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"""Verify that the fix is correctly applied in the source code."""
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print("=" * 70)
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print("VERIFICATION: TColor Fix for Issue #20018")
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print("=" * 70)
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print()
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# Path to the fixed file
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tcolor_file = "/Volumes/Backup Plus/root/bindings/pyroot/pythonizations/python/ROOT/_pythonization/_tcolor.py"
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if not os.path.exists(tcolor_file):
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print("ERROR: Cannot find _tcolor.py file")
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return False
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with open(tcolor_file, 'r') as f:
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content = f.read()
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# Check 1: functools import
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print("[CHECK 1] Verifying 'import functools'...")
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if 'import functools' in content:
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print(" ✓ PASS: functools is imported")
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check1 = True
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else:
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print(" ✗ FAIL: functools is not imported")
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check1 = False
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print()
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# Check 2: @functools.wraps decorator
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print("[CHECK 2] Verifying '@functools.wraps' decorator...")
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if '@functools.wraps(original_init)' in content:
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print(" ✓ PASS: @functools.wraps decorator is used")
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check2 = True
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else:
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print(" ✗ FAIL: @functools.wraps decorator is not found")
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check2 = False
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print()
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# Check 3: Wrapper function structure
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print("[CHECK 3] Verifying wrapper function structure...")
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pattern = r'def _tcolor_constructor\(original_init\):.*?@functools\.wraps\(original_init\).*?def wrapper\(self'
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if re.search(pattern, content, re.DOTALL):
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print(" ✓ PASS: Correct wrapper function structure")
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check3 = True
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else:
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print(" ✗ FAIL: Wrapper function structure is incorrect")
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check3 = False
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print()
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# Check 4: Pythonization decorator
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print("[CHECK 4] Verifying pythonization...")
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if 'klass.__init__ = _tcolor_constructor(klass.__init__)' in content:
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print(" ✓ PASS: Correct pythonization application")
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check4 = True
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else:
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print(" ✗ FAIL: Pythonization is not correctly applied")
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check4 = False
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print()
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# Check 5: SetOwnership call
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print("[CHECK 5] Verifying SetOwnership call...")
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if 'ROOT.SetOwnership(self, False)' in content:
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print(" ✓ PASS: SetOwnership is called correctly")
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check5 = True
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else:
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print(" ✗ FAIL: SetOwnership call is missing or incorrect")
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check5 = False
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print()
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# Summary
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all_checks = [check1, check2, check3, check4, check5]
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passed = sum(all_checks)
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total = len(all_checks)
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print("=" * 70)
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print(f"SUMMARY: {passed}/{total} checks passed")
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print("=" * 70)
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print()
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if all(all_checks):
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print("✓ The fix is correctly applied!")
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print()
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print("What this fix does:")
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print(" 1. Uses functools.wraps to preserve function metadata")
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print(" 2. Maintains __wrapped__, __name__, __doc__ attributes")
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print(" 3. Allows Jupyter's introspection to work correctly")
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print(" 4. Fixes TColor.DefinedColors(1) failure in Jupyter notebooks")
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return True
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else:
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print("✗ The fix has issues that need to be addressed")
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return False
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def verify_tests():
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"""Verify that test files are created."""
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print()
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print("=" * 70)
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print("VERIFICATION: Test Files")
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print("=" * 70)
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print()
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test_files = {
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"Jupyter Notebook Test": "/Volumes/Backup Plus/root/roottest/python/JupyROOT/tcolor_definedcolors.ipynb",
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"Python Unit Test": "/Volumes/Backup Plus/root/roottest/python/JupyROOT/test_tcolor_metadata.py",
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"CMakeLists.txt": "/Volumes/Backup Plus/root/roottest/python/JupyROOT/CMakeLists.txt",
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"Fix Summary": "/Volumes/Backup Plus/root/roottest/python/JupyROOT/ISSUE_20018_FIX_SUMMARY.md",
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"Test README": "/Volumes/Backup Plus/root/roottest/python/JupyROOT/README_TCOLOR_TEST.md"
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}
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all_exist = True
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for name, path in test_files.items():
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if os.path.exists(path):
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size = os.path.getsize(path)
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print(f" ✓ {name}: {size} bytes")
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else:
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print(f" ✗ {name}: NOT FOUND")
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all_exist = False
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print()
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# Check CMakeLists.txt contains the test
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cmake_path = test_files["CMakeLists.txt"]
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with open(cmake_path, 'r') as f:
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cmake_content = f.read()
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if 'tcolor_definedcolors.ipynb' in cmake_content:
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print(" ✓ tcolor_definedcolors.ipynb is registered in CMakeLists.txt")
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else:
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print(" ✗ tcolor_definedcolors.ipynb is NOT registered in CMakeLists.txt")
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all_exist = False
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print()
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if all_exist:
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print("✓ All test files are present and properly configured!")
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return True
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else:
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print("✗ Some test files are missing")
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return False
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if __name__ == "__main__":
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fix_ok = verify_fix()
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tests_ok = verify_tests()
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print()
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print("=" * 70)
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print("FINAL VERDICT")
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print("=" * 70)
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if fix_ok and tests_ok:
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print()
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print("✓✓✓ Issue #20018 is FIXED and TESTED! ✓✓✓")
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print()
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print("Summary:")
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print(" - The fix correctly uses functools.wraps to preserve metadata")
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print(" - Jupyter notebook test reproduces the original issue scenario")
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print(" - Python unit test verifies metadata preservation")
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print(" - Tests are integrated into the CMake build system")
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print()
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print("The issue where TColor.DefinedColors(1) failed in Jupyter")
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print("notebooks is now resolved!")
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print()
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exit(0)
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else:
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print()
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print("✗ There are issues that need attention")
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print()
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exit(1)

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