added tests for util class

core/src/test/java/jef/util/UtilTest.java

@@ -0,0 +1,34 @@
+package jef.util;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class UtilTest {
+
+    @Test
+    void tryGet_NoException() {
+        //setup
+        var object = new Object();
+
+        //test
+        var ret = Util.tryGet(() -> object);
+
+        //assert
+        assertTrue(ret.isPresent());
+        assertEquals(object, ret.orElseThrow());
+    }
+
+    @Test
+    void tryGet_Exception() {
+        //test
+        var ret = Util.tryGet(() -> {
+            throw new Exception();
+        });
+
+        //assert
+        assertFalse(ret.isPresent());
+    }
+}