unit testst for utility-max3 supplied

tests/util-test.cpp

@@ -0,0 +1,74 @@
+/*
+File:        util-test.cpp
+Description: This is a C++ source file containing  unit tests for util.cpp.
+Rev:         0.1
+Created:     01.04.26
+Author:      Uwe Jakobeit
+Copyright:   Binder GmbH
+Purpose:     Testing utility functions
+Notes:       [Any relevant details, such as dependencies, usage examples, or known issues.]
+*/
+
+
+#include <gtest/gtest.h>
+
+#include <limits>
+
+#include "util.h"
+
+using namespace UTILITY_FUNCTIONS;
+
+//----------- Test of utility function 'max3' ---------
+// Magic numbers for simplicity ( exceptionally allowed here )
+
+// test if param 3 is max value
+TEST(UtilityTest_max3, param_3_is_max) {
+    double max = max3(1.0f, 2.0f, 3.0f);
+    EXPECT_DOUBLE_EQ(max, 3.0f);
+}
+
+// test if param 2 is max value
+TEST(UtilityTest_max3, param_2_is_max) {
+    double max = max3(1.0f, 3.0f, 2.0f);
+    EXPECT_DOUBLE_EQ(max, 3.0f);
+}
+
+// test if param 1 is max value
+TEST(UtilityTest_max3, param_1_is_max) {
+    double max = max3( 3.0f, 1.0f, 2.0f);
+    EXPECT_DOUBLE_EQ(max, 3.0f);
+}
+
+// test all params are max value
+TEST(UtilityTest_max3, all_params_equal) {
+    double max = max3( 3.0f, 3.0f, 3.0f);
+    EXPECT_DOUBLE_EQ(max, 3.0f);
+}
+
+// test all params are zero
+TEST(UtilityTest_max3, all_params_zero) {
+    double max = max3( 0.0f, 0.0f, 0.0f);
+    EXPECT_DOUBLE_EQ(max, 0.0f);
+}
+
+// test 2 params negatve, one is zero
+TEST(UtilityTest_max3, 2_params_negative_one_is_zero) {
+    double max = max3( -2.0f, -1.0f, 0.0f);
+    EXPECT_DOUBLE_EQ(max, 0.0f);
+}
+
+// test 2 params negatve, one is zero
+TEST(UtilityTest_max3, all_params_negative_one_is_max) {
+    double max = max3( -2.0f, -1.0f, -3.0f);
+    EXPECT_DOUBLE_EQ(max, -1.0f);
+}
+
+
+TEST(UtilityTest_max3, all_params_type_double) {
+    double max = max3( std::numeric_limits<double>::max(), 0.0f, 0.0f);
+
+    EXPECT_DOUBLE_EQ(max, std::numeric_limits<double>::max());
+}
+
+
+