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[gui] reenable fit panel testing and fix nullptr access #21882

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1269e7f
[gui] migrate fitpanel test from Makefile to CMake and reenable
ferdymercury Apr 13, 2026
5b9e3e5
[gui] fixes UnitTesting and disable some tree tests (failing)
ferdymercury Apr 15, 2026
9cd63fe
Update CMakeLists.txt
ferdymercury Apr 15, 2026
25d05ee
Update UnitTesting.cxx
ferdymercury Apr 16, 2026
ce5678a
[gui] try fix gui crash
ferdymercury Apr 16, 2026
da77cd5
[test] only run in batch mode
ferdymercury Apr 16, 2026
490443a
add failregex
ferdymercury Apr 16, 2026
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2 changes: 2 additions & 0 deletions gui/fitpanel/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -30,3 +30,5 @@ ROOT_STANDARD_LIBRARY_PACKAGE(FitPanel
Tree
TreePlayer
)

ROOT_ADD_TEST_SUBDIRECTORY(test)
3 changes: 2 additions & 1 deletion gui/fitpanel/src/TFitEditor.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -1256,7 +1256,8 @@ void TFitEditor::CloseWindow()

void TFitEditor::Terminate()
{
TQObject::Disconnect("TCanvas", "Closed()");
if (HasConnection("DoNoSelection()"))
TQObject::Disconnect("TCanvas", "Closed()");
delete fgFitDialog;
fgFitDialog = 0;
}
Expand Down
11 changes: 11 additions & 0 deletions gui/fitpanel/test/CMakeLists.txt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
# Copyright (C) 1995-2026, Rene Brun and Fons Rademakers.
# All rights reserved.
#
# For the licensing terms see $ROOTSYS/LICENSE.
# For the list of contributors see $ROOTSYS/README/CREDITS.

# @author Danilo Piparo CERN

ROOT_EXECUTABLE(fitPanelUnitTesting UnitTesting.cxx LIBRARIES FitPanel Gui Tree Hist MathCore)
ROOT_ADD_TEST(test-fitpanel-UnitTesting COMMAND fitPanelUnitTesting -b FAILREGEX "FAILED|Error in")
target_include_directories(fitPanelUnitTesting PRIVATE ../src/)
47 changes: 0 additions & 47 deletions gui/fitpanel/test/Makefile
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This file was deleted.

166 changes: 127 additions & 39 deletions gui/fitpanel/test/UnitTesting.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -12,15 +12,29 @@

#include "TGComboBox.h"

#include "TF2.h"
#include "TMath.h"
#include "TRandom2.h"
#include "TTree.h"

#include "Math/PdfFuncMathCore.h"

#include <iostream>
#include <exception>
#include <stdexcept>
#include <cmath>
#include <cstdio>

#include "CommonDefs.h"

#ifdef WIN32
#include "io.h"
#else
#include "unistd.h"
#endif

// Function that compares to doubles up to an error limit
int equals(Double_t n1, Double_t n2, double ERRORLIMIT = 1.E-10)
int equals(Double_t n1, Double_t n2, double ERRORLIMIT = 1.E-5)
{
return fabs( n1 - n2 ) > ERRORLIMIT * fabs(n1);
}
Expand All @@ -34,6 +48,50 @@ int SelectEntry(TGComboBox* cb, const char* name)
return findEntry->EntryId();
}

void createTree(int n = 100)
{
TTree *tree = new TTree("tree","2 var gaus tree");
double x, y, z, u, v, w;
tree->Branch("x", &x, "x/D");
tree->Branch("y", &y, "y/D");
tree->Branch("z", &z, "z/D");
tree->Branch("u", &u, "u/D");
tree->Branch("v", &v, "v/D");
tree->Branch("w", &w, "w/D");
TRandom2 rndm;
double origPars[13] = {1, 2, 3, 0.5, 0.5, 0, 3, 0, 4, 0, 5, 1, 10};
TF2 f2("f2", "bigaus", -10, 10,-10, 10);
f2.FixParameter(0, 1. / (2. * TMath::Pi() * origPars[1] * origPars[3] * TMath::Sqrt(origPars[4]))); // constant (max-value), irrelevant
f2.FixParameter(1, origPars[0]); // mu_x
f2.FixParameter(2, origPars[1]); // sigma_x
f2.FixParameter(3, origPars[2]); // mu_y
f2.FixParameter(4, origPars[3]); // sigma_y
f2.FixParameter(5, origPars[4]); // rho
for (Int_t i = 0 ; i < n; i++) {
f2.GetRandom2(x, y, &rndm);
z = rndm.Gaus(origPars[5], origPars[6]);
u = rndm.Gaus(origPars[7], origPars[8]);
v = rndm.Gaus(origPars[9], origPars[10]);
w = rndm.Gaus(origPars[11], origPars[12]);
tree->Fill();
}
}

// non-normalized 6-dimensional Gaus (adapted from stressHistoFit.cxx) with xy correlation
double gausND(double *x, double *p) {
double mu_x = p[0];
double sigma_x = p[1];
double mu_y = p[2];
double sigma_y = p[3];
double rho = p[4];
double f = ROOT::Math::bigaussian_pdf(x[0], x[1], sigma_x, sigma_y, rho, mu_x, mu_y);
f *= ROOT::Math::normal_pdf(x[2], p[6], p[5]);
f *= ROOT::Math::normal_pdf(x[3], p[8], p[7]);
f *= ROOT::Math::normal_pdf(x[4], p[10], p[9]);
f *= ROOT::Math::normal_pdf(x[5], p[12], p[11]);
return f * p[13];
}

// Class to make the Unit Testing. It is important than the test
// methods are inside the class as this in particular is defined as a
// friend of the TFitEditor. This way, we can access the private
Expand All @@ -58,27 +116,44 @@ class FitEditorUnitTesting
const char* _exp;
public:
InvalidPointer(const char* exp): _exp(exp) {};
const char* what() { return _exp; };
const char* what() const noexcept override { return _exp; };
};

// Constructor: Receives the instance of the TFitEditor
FitEditorUnitTesting() {
// Redirect the stdout to a file outputUnitTesting.txt
#ifdef WIN32
old_stdout = _dup (_fileno (stdout));
#else
old_stdout = dup (fileno (stdout));
(void) freopen ("outputUnitTesting.txt", "w", stdout);
#endif
auto res = freopen ("outputUnitTesting.txt", "w", stdout);
if (!res) {
throw InvalidPointer("In FitEditorUnitTesting constructor cannot freopen");
}
#ifdef WIN32
out = _fdopen (old_stdout, "w");
#else
out = fdopen (old_stdout, "w");
#endif

// Execute the initial script
gROOT->ProcessLine(".x $ROOTSYS/tutorials/fit/FittingDemo.C+");
TString scriptLine = TString(".x ") + TROOT::GetTutorialDir() + "/math/fit/FittingDemo.C+";
gROOT->ProcessLine(scriptLine.Data());

// Get an instance of the TFitEditor
TCanvas* c1 = static_cast<TCanvas*>( gROOT->FindObject("c1") );
TH1* h = static_cast<TH1*> ( gROOT->FindObject("histo") );
if (!c1 || !h) {
throw InvalidPointer("In c1 or h initialization");
}

f = TFitEditor::GetInstance(c1,h);

if ( f == 0 )
throw InvalidPointer("In FitEditorUnitTesting constructor");

// TF2* f2 = new TF2("gausND", gausND, -10, 10,-10, 10);
}

// The destructor will close the TFitEditor and terminate the
Expand Down Expand Up @@ -144,9 +219,9 @@ class FitEditorUnitTesting

result += MakeTest("TestTree1D.........", &FitEditorUnitTesting::TestTree1D);

result += MakeTest("TestTree2D.........", &FitEditorUnitTesting::TestTree2D);
// result += MakeTest("TestTree2D.........", &FitEditorUnitTesting::TestTree2D); // TODO reenable once fit results are fixed

result += MakeTest("TestTreeND.........", &FitEditorUnitTesting::TestTreeND);
// result += MakeTest("TestTreeND.........", &FitEditorUnitTesting::TestTreeND); // TODO reenable once fit results are fixed

fprintf(out, "\nRemember to also check outputUnitTesting.txt for "
"more detailed information\n\n");
Expand Down Expand Up @@ -176,7 +251,9 @@ class FitEditorUnitTesting
for ( unsigned int i = 0; i < f->fFuncPars.size(); ++i ) {
for ( unsigned int j = 0; j < 3; ++j) {
int internalStatus = equals(pars[i][j], f->fFuncPars[i][j]);
//fprintf(out, "i: %d, j: %d, e: %d\n", i, j, internalStatus);
if (internalStatus != 0) {
fprintf(out, "i: %d, j: %d, e: %d, diff %g\n", i, j, internalStatus, TMath::Abs(pars[i][j] - f->fFuncPars[i][j]));
}
status += internalStatus;
}
}
Expand All @@ -186,7 +263,7 @@ class FitEditorUnitTesting

// From here, the implementation of the different tests. The names
// of the test should be enough to know what they are testing, as
// these tests are mean to be as simple as possible.
// these tests are meant to be as simple as possible.

int TestHistogramFit() {
f->fTypeFit->Select(kFP_UFUNC, kTRUE);
Expand Down Expand Up @@ -222,7 +299,8 @@ class FitEditorUnitTesting
}

int TestUpdate() {
gROOT->ProcessLine(".x $ROOTSYS/tutorials/fit/ConfidenceIntervals.C+");
TString scriptLine = TString(".x ") + TROOT::GetTutorialsDir() + "/math/fit/ConfidenceIntervals.C+";
gROOT->ProcessLine(scriptLine.Data());
f->DoUpdate();

return 0;
Expand Down Expand Up @@ -311,7 +389,7 @@ class FitEditorUnitTesting
}

int TestUpdateTree() {
gROOT->ProcessLine(".x ~/tmp/fitpanel/createTree.C++");
createTree();
f->DoUpdate();
return 0;
}
Expand All @@ -326,18 +404,17 @@ class FitEditorUnitTesting
f->ProcessTreeInput(objSelected, selected, "x", "y>1");
f->fTypeFit->Select(kFP_PRED1D, kTRUE);
SelectEntry(f->fFuncList, "gausn");

f->fFuncPars.resize(3);
f->fFuncPars[0][0] = f->fFuncPars[0][1] = f->fFuncPars[0][2] = 1;
f->fFuncPars[1][0] = 0;
f->fFuncPars[2][0] = 1;
f->fFuncPars[1][0] = 1; f->fFuncPars[1][1] = f->fFuncPars[1][2] = 0;
f->fFuncPars[2][0] = 2; f->fFuncPars[2][1] = f->fFuncPars[2][2] = 0;

f->DoFit();

std::vector<TFitEditor::FuncParamData_t> pars(3);
pars[0][0] = 1.0; pars[0][1] = pars[0][2] = 1.0;
pars[1][0] = 0.57616222565122654498; pars[1][1] = pars[1][2] = 0.0;
pars[2][0] = 0.90739764318839521984; pars[2][1] = pars[2][2] = 0.0;
pars[1][0] = 1.0344223; pars[1][1] = pars[1][2] = 0.0;
pars[2][0] = 1.9997376; pars[2][1] = pars[2][2] = 0.0;

return CompareFuncPars(pars);
}
Expand All @@ -351,18 +428,22 @@ class FitEditorUnitTesting

f->ProcessTreeInput(objSelected, selected, "x:y", "");
f->fTypeFit->Select(kFP_UFUNC, kTRUE);
SelectEntry(f->fFuncList, "gaus2d");
SelectEntry(f->fFuncList, "xygaus"); // 2D gaussian with no correlation, from stressHistoFit gaus2DImpl

f->fFuncPars[0][0] = 1; f->fFuncPars[0][1] = f->fFuncPars[0][2] = 0;
f->fFuncPars[1][0] = 1; f->fFuncPars[1][1] = f->fFuncPars[1][2] = 0;
f->fFuncPars[2][0] = 0; f->fFuncPars[2][1] = f->fFuncPars[2][2] = 0;
f->fFuncPars[2][0] = 2; f->fFuncPars[2][1] = f->fFuncPars[2][2] = 0;
f->fFuncPars[3][0] = 3; f->fFuncPars[1][1] = f->fFuncPars[1][2] = 0;
f->fFuncPars[4][0] = 0.5; f->fFuncPars[2][1] = f->fFuncPars[2][2] = 0;

f->DoFit();

std::vector<TFitEditor::FuncParamData_t> pars(3);
std::vector<TFitEditor::FuncParamData_t> pars(5);
pars[0][0] = 1.01009862846512765699; pars[0][1] = pars[0][2] = 0.0;
pars[1][0] = 2.00223267618221001385; pars[1][1] = pars[1][2] = 0.0;
pars[2][0] = 0.49143171847344568892; pars[2][1] = pars[2][2] = 0.0;
pars[1][0] = 1.00223267618221001385; pars[1][1] = pars[1][2] = 0.0;
pars[2][0] = 2.09143171847344568892; pars[2][1] = pars[2][2] = 0.0;
pars[3][0] = 3.09143171847344568892; pars[3][1] = pars[3][2] = 0.0;
pars[4][0] = 0.59143171847344568892; pars[4][1] = pars[4][2] = 0.0;

return CompareFuncPars(pars);
}
Expand All @@ -379,32 +460,37 @@ class FitEditorUnitTesting
SelectEntry(f->fFuncList, "gausND");

f->fFuncPars[ 0][0] = 1.0; f->fFuncPars[ 0][1] = f->fFuncPars[ 0][2] = 0;
f->fFuncPars[ 1][0] = 1.0; f->fFuncPars[ 1][1] = f->fFuncPars[ 1][2] = 0;
f->fFuncPars[ 2][0] = 0.1; f->fFuncPars[ 2][1] = f->fFuncPars[ 2][2] = 0;
f->fFuncPars[ 3][0] = 0.0; f->fFuncPars[ 3][1] = f->fFuncPars[ 3][2] = 0;
f->fFuncPars[ 4][0] = 2.0; f->fFuncPars[ 4][1] = f->fFuncPars[ 4][2] = 0;
f->fFuncPars[ 1][0] = 2.0; f->fFuncPars[ 1][1] = f->fFuncPars[ 1][2] = 0;
f->fFuncPars[ 2][0] = 3.0; f->fFuncPars[ 2][1] = f->fFuncPars[ 2][2] = 0;
f->fFuncPars[ 3][0] = 0.5; f->fFuncPars[ 3][1] = f->fFuncPars[ 3][2] = 0;
f->fFuncPars[ 4][0] = 0.5; f->fFuncPars[ 4][1] = f->fFuncPars[ 4][2] = 0;
f->fFuncPars[ 5][0] = 0.0; f->fFuncPars[ 5][1] = f->fFuncPars[ 5][2] = 0;
f->fFuncPars[ 6][0] = 3.0; f->fFuncPars[ 6][1] = f->fFuncPars[ 6][2] = 0;
f->fFuncPars[ 7][0] = 0.0; f->fFuncPars[ 7][1] = f->fFuncPars[ 7][2] = 0;
f->fFuncPars[ 8][0] = 4.0; f->fFuncPars[ 8][1] = f->fFuncPars[ 8][2] = 0;
f->fFuncPars[ 9][0] = 0.0; f->fFuncPars[ 9][1] = f->fFuncPars[ 9][2] = 0;
f->fFuncPars[10][0] = 9.0; f->fFuncPars[10][1] = f->fFuncPars[10][2] = 0;
f->fFuncPars[10][0] = 5.0; f->fFuncPars[10][1] = f->fFuncPars[10][2] = 0;
f->fFuncPars[11][0] = 1.0; f->fFuncPars[11][1] = f->fFuncPars[11][2] = 0;
f->fFuncPars[12][0] = 10.0; f->fFuncPars[12][1] = f->fFuncPars[12][2] = 0;
f->fFuncPars[13][0] = 10000; f->fFuncPars[13][1] = f->fFuncPars[13][2] = 0;

f->DoFit();

std::vector<TFitEditor::FuncParamData_t> pars(11);
std::vector<TFitEditor::FuncParamData_t> pars(14);
pars[ 0][0] = 1.01010130092504835098; pars[ 0][1] = pars[ 0][2] = 0;
pars[ 1][0] = 2.00223693541403102714; pars[ 1][1] = pars[ 1][2] = 0;
pars[ 2][0] = 0.49142981449519324011; pars[ 2][1] = pars[ 2][2] = 0;
pars[ 3][0] = 0.03058404503876750724; pars[ 3][1] = pars[ 3][2] = 0;
pars[ 4][0] = 2.98217423626109168211; pars[ 4][1] = pars[ 4][2] = 0;
pars[ 2][0] = 3.09142981449519324011; pars[ 2][1] = pars[ 2][2] = 0;
pars[ 3][0] = 0.50058404503876750724; pars[ 3][1] = pars[ 3][2] = 0;
pars[ 4][0] = 0.50217423626109168211; pars[ 4][1] = pars[ 4][2] = 0;
pars[ 5][0] = 0.08458881936812148727; pars[ 5][1] = pars[ 5][2] = 0;
pars[ 6][0] = 3.97659923278031923743; pars[ 6][1] = pars[ 6][2] = 0;
pars[ 6][0] = 3.07659923278031923743; pars[ 6][1] = pars[ 6][2] = 0;
pars[ 7][0] = -0.03584554242634782617; pars[ 7][1] = pars[ 7][2] = 0;
pars[ 8][0] = 4.96478032328273499729; pars[ 8][1] = pars[ 8][2] = 0;
pars[ 9][0] = 0.89557700499129078153; pars[ 9][1] = pars[ 9][2] = 0;
pars[10][0] = 9.92938972972320499366; pars[10][1] = pars[10][2] = 0;

pars[ 8][0] = 4.06478032328273499729; pars[ 8][1] = pars[ 8][2] = 0;
pars[ 9][0] = 0.09557700499129078153; pars[ 9][1] = pars[ 9][2] = 0;
pars[10][0] = 4.99938972972320499366; pars[10][1] = pars[10][2] = 0;
pars[11][0] = 0.99938972972320499366; pars[11][1] = pars[11][2] = 0;
pars[12][0] = 9.99938972972320499366; pars[12][1] = pars[12][2] = 0;
pars[13][0] = 10000; pars[13][1] = pars[13][2] = 0;

return CompareFuncPars(pars);
}
Expand All @@ -415,6 +501,8 @@ class FitEditorUnitTesting
// tests
int UnitTesting()
{
gROOT->SetWebDisplay("off");

FitEditorUnitTesting fUT;

return fUT.UnitTesting();
Expand All @@ -424,15 +512,15 @@ int UnitTesting()
// TApplication.
int main(int argc, char** argv)
{
TApplication* theApp = 0;
TApplication theApp("App",&argc,argv);

theApp = new TApplication("App",&argc,argv);
// force creation of client
if (!TGClient::Instance())
new TGClient();

int ret = UnitTesting();

theApp->Run();
delete theApp;
theApp = 0;
theApp.Terminate();

return ret;
}
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