diff --git a/src/lib.cpp b/src/lib.cpp
index 75f8cf9..2b58745 100644
--- a/src/lib.cpp
+++ b/src/lib.cpp
@@ -1,10 +1,13 @@
-#include "lib.hh"
-
 #include "prep/prep.hh"
 
+#include <vector>
+
 void run() {
     Room room1(1, "Room 1", 1710087364, RoomStatus::IN_PROGRESS);
     Room room2(2, "Room 2", 1710087384, RoomStatus::ENDED);
+    Role role1({Action::KILL, Action::HEAL});
+    std::vector<Action> actions = {Action::HEAL};
+    Role role2(actions);
 }
 
 int functionToTest(int a) {
diff --git a/src/prep/prep.cpp b/src/prep/prep.cpp
index 5d4d199..0cd8665 100644
--- a/src/prep/prep.cpp
+++ b/src/prep/prep.cpp
@@ -2,13 +2,41 @@
 
 #include "timeUtils.hh"
 
+#include <initializer_list>
+
 int add(int a, int b) {
     return a + b;
 }
 
+Role::Role(std::initializer_list<Action> actions) {
+    for (auto &a : actions) {
+        this->actions.push_back(a);
+    }
+}
+
+Role::Role(std::vector<Action> actions) {
+    for (auto &a : actions) {
+        this->actions.push_back(a);
+    }
+}
+
+Player::Player(std::string username, Role role, PlayerStatus playerStatus):
+    username(username),
+    role(role),
+    playerStatus(playerStatus) {
+}
+
 Room::Room(uint32_t id, std::string title, uint32_t utcTimestampCreatedAt, RoomStatus status):
     id(id),
     title(title),
     status(status) {
     this->utcTimestampCreatedAt = createUTCTimestamp(utcTimestampCreatedAt);
 }
+
+Event::Event(std::string title, uint32_t utcTimestampCreatedAt, uint32_t numberNight, bool isVisible):
+    title(title),
+    utcTimestampCreatedAt(createUTCTimestamp(utcTimestampCreatedAt)),
+    numberNight(numberNight),
+    isVisible(isVisible) {
+    this->utcTimestampCreatedAt = createUTCTimestamp(utcTimestampCreatedAt);
+}
diff --git a/src/prep/prep.hh b/src/prep/prep.hh
index 9a8d1aa..eadd4e6 100644
--- a/src/prep/prep.hh
+++ b/src/prep/prep.hh
@@ -47,12 +47,17 @@ struct Event;
 
 struct Role {
     std::vector<Action> actions;
+
+    Role(std::initializer_list<Action> actions);
+    Role(std::vector<Action> actions);
 };
 
 struct Player {
     std::string username;
     Role role;
     PlayerStatus playerStatus;
+
+    Player(std::string username, Role role, PlayerStatus playerStatus);
 };
 
 struct Room {
@@ -71,6 +76,8 @@ struct Event {
     bool isVisible;
     std::vector<Action> causedBy;
     std::vector<Action> influenced;
+
+    Event(std::string title, uint32_t utcTimestampCreatedAt, uint32_t numberNight, bool isVisible);
 };
 
 #endif