add junit and test code

Author: meowpunch

pom.xml

@@ -14,6 +14,13 @@
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+
         <dependency>
             <groupId>org.reflections</groupId>
             <artifactId>reflections</artifactId>

src/main/java/creational/factory/exercise/PersonFactory.java

@@ -10,12 +10,4 @@ public class PersonFactory {
     public Person createPerson(String name) {
         return new Person(numOfPerson++, name);
     }
-}
-
-class ExerciseDemo {
-    public static void main(String[] args) {
-        final PersonFactory pf = new PersonFactory();
-
-        Stream.of("Tommy", "Sunguck", "Meow").forEach(n -> System.out.println(pf.createPerson(n)));
-    }
 }

src/test/java/creational/factory/exercise/PersonFactoryTest.java

@@ -0,0 +1,25 @@
+package creational.factory.exercise;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class PersonFactoryTest {
+
+    @Test
+    void createPerson() {
+        // given
+        final PersonFactory pf = new PersonFactory();
+        final String[] names = new String[] {"Marcel", "Tony", "Jinhoon"};
+
+        for (int i = 0; i < names.length; i++) {
+            // when
+            final Person p = pf.createPerson(names[i]);
+
+            // then
+            assertEquals(i, p.id());
+        }
+    }
+}