#3281 Add weighted geometric mean calculator

ApplicationCode/UnitTests/RiaWeightedGeometricMeanCalculator-Test.cpp

@@ -0,0 +1,38 @@
+#include "gtest/gtest.h"
+
+#include "RiaWeightedGeometricMeanCalculator.h"
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+TEST(RiaWeightedGeometricMeanCalculator, BasicUsage)
+{
+    {
+        RiaWeightedGeometricMeanCalculator calc;
+
+        EXPECT_DOUBLE_EQ(0.0, calc.aggregatedWeight());
+        EXPECT_DOUBLE_EQ(0.0, calc.weightedMean());
+    }
+
+
+    {
+        RiaWeightedGeometricMeanCalculator calc;
+
+        std::vector<double> values {30.0, 60.0};
+        std::vector<double> weights {1.5, 3.5};
+
+        for (size_t i = 0; i< values.size(); i++)
+        {
+            calc.addValueAndWeight(values[i], weights[i]);
+        }
+
+        double expectedValue = std::pow(
+            std::pow(30.0, 1.5) * std::pow(60.0, 3.5),
+            1 / (1.5 + 3.5)
+        );
+
+        EXPECT_DOUBLE_EQ(5.0, calc.aggregatedWeight());
+        EXPECT_DOUBLE_EQ(expectedValue, calc.weightedMean());
+    }
+}