Added test for F23 Problem

test/eva2/problems/F23ProblemTest.java

@@ -0,0 +1,24 @@
+package eva2.problems;
+
+import eva2.tools.math.Mathematics;
+import junit.framework.TestCase;
+
+public class F23ProblemTest extends TestCase {
+
+    /**
+     * The Generalized Schaffer function has its minimum
+     * at x_{i} = 0
+     *
+     * @throws Exception
+     */
+    public void testEvaluate() throws Exception {
+        F23Problem problem = new F23Problem();
+
+        for (int i = 1; i < 100; i++) {
+            double[] x = Mathematics.zeroes(i);
+            double[] res = problem.evaluate(x);
+            assertEquals(1, res.length);
+            assertEquals(0.0, res[0]);
+        }
+    }
+}