Update javaxval/src/test/java/org/baeldung/javaxval/messageinterpolator/ParameterMessageInterpolaterIntegrationTest.java

update to use the givenX_whenY_thenZ naming convention for tests

Co-Authored-By: KevinGilmore <kpg102@gmail.com>

java-math/src/test/java/com/baeldung/matrices/MatrixProvider.java

@@ -0,0 +1,33 @@
+package com.baeldung.matrices;
+
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+
+@State(Scope.Benchmark)
+public class MatrixProvider {
+    private double[][] firstMatrix;
+    private double[][] secondMatrix;
+
+    public MatrixProvider() {
+        firstMatrix =
+          new double[][] {
+            new double[] {1d, 5d},
+            new double[] {2d, 3d},
+            new double[] {1d ,7d}
+          };
+
+        secondMatrix =
+          new double[][] {
+            new double[] {1d, 2d, 3d, 7d},
+            new double[] {5d, 2d, 8d, 1d}
+          };
+    }
+
+    public double[][] getFirstMatrix() {
+        return firstMatrix;
+    }
+
+    public double[][] getSecondMatrix() {
+        return secondMatrix;
+    }
+}