add test for CellBinning

GeoModelCore/GeoModelKernel/GeoModelKernel/RCBase.h

 /*
-  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration 
 */
 
 /**

GeoModelCore/GeoModelKernel/tests/testCellBinning.cxx

+/*
+  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
+*/
+
+
+#include "GeoModelKernel/CellBinning.h"
+
+#include <exception>
+#include <gtest/gtest.h>
+
+#define GTEST_COUT std::cerr << "[ MESSAGE  ] "
+
+class CellBinningFixture : public ::testing::Test {
+protected:
+    CellBinning cb{1., 10., 10, 1};
+};
+
+TEST(CellBinning, CanBeConstructed) {
+  EXPECT_NO_THROW(CellBinning cb(1.,10.,10,1.));
+}
+
+
+TEST(CellBinning, CanBeMoveAndCopyConstructed) {
+  EXPECT_TRUE( std::is_copy_constructible_v<CellBinning>);
+  EXPECT_TRUE( std::is_move_constructible_v<CellBinning>);
+}
+
+TEST(CellBinning, CanBeMoveAndCopyAssigned) {
+  EXPECT_TRUE(std::is_copy_assignable_v<CellBinning>);
+  EXPECT_TRUE(std::is_move_assignable_v<CellBinning>);
+}
+
+TEST(CellBinning, DISABLED_EndValMustBeGreaterThanStartVal) {
+  EXPECT_THROW(CellBinning cb(10., 1., 10, 1), std::exception);
+}
+
+TEST(CellBinning, DISABLED_NumBinsCannotBeZero) {
+  EXPECT_THROW(CellBinning cb(10., 1., 0, 1), std::exception);
+}
+
+TEST(CellBinning, DISABLED_NumBinsMustBePositive) {
+  EXPECT_THROW(CellBinning cb(10., 1., -3, 1), std::exception);
+}
+
+TEST_F(CellBinningFixture, lowerBinIsOk){
+  EXPECT_EQ(cb.binLower(2), 1.9);
+}
+
+TEST_F(CellBinningFixture, upperBinIsOk){
+  EXPECT_EQ(cb.binUpper(2), 2.8);
+}
+
+TEST_F(CellBinningFixture, centreBinIsOk){
+  EXPECT_EQ(cb.binCenter(2), 2.35);
+}
+
+TEST_F(CellBinningFixture, startBinIsOk){
+  EXPECT_EQ(cb.getStart(), 1.0);
+}
+TEST_F(CellBinningFixture, endBinIsOk){
+  EXPECT_EQ(cb.getEnd(), 10.0);
+}
+TEST_F(CellBinningFixture, numDivisionsIsOk){
+  EXPECT_EQ(cb.getNumDivisions(), 10);
+}
+TEST_F(CellBinningFixture, getDeltaIsOk){
+  EXPECT_EQ(cb.getDelta(), 0.9);
+}
+TEST_F(CellBinningFixture, firstDivisionNumberIsOk){
+  EXPECT_EQ(cb.getFirstDivisionNumber(), 1);
+}
+