completed intro

0-0-intro/src/main/java/com/bobocode/intro/ExerciseIntroduction.java

@@ -2,6 +2,8 @@
 
 import com.bobocode.util.ExerciseNotCompletedException;
 
+import java.util.Base64;
+
 /**
  * Welcome! This is an introduction exercise that will show you a simple example of Bobocode exercises.
  * <p>
@@ -24,7 +26,8 @@ public class ExerciseIntroduction {
      */
     public String getWelcomeMessage() {
         // todo: implement a method and return a message according to javadoc
-        throw new ExerciseNotCompletedException(); 
+        //throw new ExerciseNotCompletedException();
+        return "The key to efficient learning is practice!";
     }
 
     /**
@@ -40,6 +43,8 @@ public String getWelcomeMessage() {
      */
     public String encodeMessage(String message) {
         // todo: switch to branch "completed" in order to see how it should be implemented
-        throw new ExerciseNotCompletedException();
+        //throw new ExerciseNotCompletedException();
+        return Base64.getEncoder().encodeToString(message.getBytes());
+
     }
 }

0-0-intro/src/test/java/com/bobocode/intro/ExerciseIntroductionTest.java

@@ -3,6 +3,7 @@
 import lombok.SneakyThrows;
 import org.junit.jupiter.api.*;
 
+import java.lang.reflect.InvocationTargetException;
 import java.util.Arrays;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -38,7 +39,7 @@ void getWelcomeMessage() {
     @Order(2)
     @DisplayName("encodeMessage returns correct encoded message")
     @SneakyThrows
-    void encodeMessageReturnsCorrectPhrase() {
+    void encodeMessageReturnsCorrectPhrase() throws InvocationTargetException, IllegalAccessException {
         var encodeMessageMethod = Arrays.stream(ExerciseIntroduction.class.getDeclaredMethods())
                 .filter(method -> method.getName().equals("encodeMessage"))
                 .findAny()