Create UserControllerTest.java

src/test/java/com/raffaelbrandao/demo/controllers/UserControllerTest.java

@@ -0,0 +1,35 @@
+package com.raffaelbrandao.demo.controllers;
+
+import com.raffaelbrandao.demo.models.UserEntity;
+import com.raffaelbrandao.demo.services.UserService;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@ExtendWith(MockitoExtension.class)
+public class UserControllerTest {
+    @InjectMocks
+    private UserController userController;
+    @Mock
+    private UserService userService;
+
+    @Test
+    public void whenFindAllUsers_thenReturnAllUsers() {
+        //given
+        List<UserEntity> allUsersExpected = new ArrayList<>();
+        allUsersExpected.add(new UserEntity(null, "joaosilva", "João Silva", null, null));
+        allUsersExpected.add(new UserEntity(null, "mariasantos", "Maria Santos", null, null));
+        Mockito.when(userService.findAll()).thenReturn(allUsersExpected);
+        //when
+        List<UserEntity> allUsers = userController.findAllUsers();
+        //then
+        Assertions.assertEquals(allUsersExpected, allUsers);
+    }
+}