Added missing junit tests to ContactService (fetchByPhoneNumber)

TODO: save in db incoming sms (they will be useful when calculating stats)

calltree-core/src/test/java/org/wicket/calltree/services/ContactServiceImplIT.java

@@ -5,11 +5,13 @@
 import org.springframework.boot.test.context.SpringBootTest;
 import org.wicket.calltree.dto.ContactDto;
 import org.wicket.calltree.enums.Role;
+import org.wicket.calltree.exceptions.ContactException;
 
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 /**
  * @author Alessandro Arosio - 12/04/2020 09:30
@@ -42,4 +44,16 @@ void testGetAllTreeUntilRoleLeader_ReturnsAllUntilLeader() {
         assertThat(tree).hasSize(2);
         assertThat(tree).doesNotContain(reporters.get(0));
     }
+
+    @Test
+    void testFetchByPhoneNumber_ReturnsContactDto() {
+        ContactDto contactDto = contactService.fetchContactByPhoneNumber("+444");
+
+        assertEquals("Vlissides", contactDto.getLastName());
+    }
+
+    @Test
+    void testFetchByPhoneNumber_ContactNotFound_WillThrowException() {
+        assertThrows(ContactException.class, () -> contactService.fetchContactByPhoneNumber("+00000000000"));
+    }
 }