Add basic unit tests for TMath::Sqrt and TMath::Log in MathCore

Author: Sachet kumar

math/mathcore/test/CMakeLists.txt

@@ -96,6 +96,8 @@ ROOT_ADD_GTEST(testRootFinder testRootFinder.cxx  LIBRARIES ${Libraries})
 ROOT_ADD_GTEST(testKahan testKahan.cxx LIBRARIES Core MathCore)
 ROOT_ADD_GTEST(testDelaunay2D testDelaunay2D.cxx LIBRARIES Core MathCore)
 ROOT_ADD_GTEST(testKNNDensity testKNNDensity.cxx LIBRARIES Core MathCore Hist)
+ROOT_ADD_GTEST(test_basic_math test_basic_math.cxx LIBRARIES MathCore)
+
 
 if(clad)
   ROOT_ADD_GTEST(CladDerivatorTests CladDerivatorTests.cxx LIBRARIES Core MathCore)

math/mathcore/test/test_basic_math.cxx

@@ -0,0 +1,15 @@
+#include "gtest/gtest.h"
+#include "TMath.h"   // ROOT math utilities
+
+// Basic tests for a couple of TMath functions
+TEST(MathCoreTest, SqrtFunction) {
+    double val = 9.0;
+    double out = TMath::Sqrt(val);
+    EXPECT_NEAR(out, 3.0, 1e-12);
+}
+
+TEST(MathCoreTest, LogFunction) {
+    double val = 2.71828182845904523536; // approx e
+    double out = TMath::Log(val);
+    EXPECT_NEAR(out, 1.0, 1e-12);
+}