[BAEL-2996] Moving all test under this module and adding benchmarking

libraries-2/src/test/java/com/baeldung/matrices/colt/DoubleMatrix2DUnitTest.java

@@ -4,13 +4,19 @@ import cern.colt.matrix.DoubleFactory2D;
 import cern.colt.matrix.DoubleMatrix2D;
 import cern.colt.matrix.linalg.Algebra;
 import org.junit.jupiter.api.Test;
+import org.openjdk.jmh.annotations.*;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-class DoubleMatrix2DUnitTest {
+@BenchmarkMode(Mode.AverageTime)
+@Fork(value = 2)
+@Warmup(iterations = 5)
+@Measurement(iterations = 10)
+public class DoubleMatrix2DUnitTest {
 
     @Test
-    void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
+    @Benchmark
+    public void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
         DoubleFactory2D doubleFactory2D = DoubleFactory2D.dense;
 
         DoubleMatrix2D firstMatrix = doubleFactory2D.make(
@@ -41,4 +47,5 @@ class DoubleMatrix2DUnitTest {
 
         assertThat(actual).isEqualTo(expected);
     }
+
 }