add unit test framework

DriveBackup/pom.xml

@@ -149,6 +149,11 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.2.2</version>
+            </plugin>
         </plugins>
     </build>
     <distributionManagement>
@@ -236,5 +241,17 @@
             <artifactId>minio</artifactId>
             <version>8.5.9</version>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.10.2</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <version>4.11.0</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 </project>

DriveBackup/src/test/java/ratismal/drivebackup/ExampleTest.java

@@ -0,0 +1,25 @@
+package ratismal.drivebackup;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class ExampleTest {
+
+    @Test
+    void exampleWithMockito() {
+        @SuppressWarnings("unchecked")
+        List<String> mockedList = mock();
+
+        when(mockedList.get(0)).thenReturn("first");
+
+        assertEquals("first", mockedList.get(0));
+
+        assertNull(mockedList.get(999));
+    }
+}

DriveBackup/src/test/resources/junit-platform.properties

@@ -0,0 +1,4 @@
+junit.jupiter.testmethod.order.default = org.junit.jupiter.api.MethodOrderer$Random
+junit.jupiter.testclass.order.default = org.junit.jupiter.api.ClassOrderer$Random
+junit.jupiter.execution.parallel.enabled = true
+junit.jupiter.execution.parallel.mode.default = concurrent