Merge branch '65-unit-test-for-user-entity' into 'main'

Resolve "Unit test for user entity"

Closes #65

See merge request idatt2106-v23-03/backend!35

src/test/java/ntnu/idatt2016/v233/SmartMat/entity/user/UserTest.java

+package ntnu.idatt2016.v233.SmartMat.entity.user;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+
+import java.util.Collections;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class UserTest {
+
+    @Test
+    void testGetAuthorities() {
+        User user = User.builder()
+                .authority(Authority.USER)
+                .build();
+
+        assertEquals(Collections.singletonList(new SimpleGrantedAuthority(Authority.USER.name())), user.getAuthorities());
+    }
+
+    @Test
+    void testGetPassword() {
+        User user = User.builder()
+                .password("password123")
+                .build();
+
+        assertEquals("password123", user.getPassword());
+    }
+
+    @Test
+    void testGetUsername() {
+        User user = User.builder()
+                .username("johndoe")
+                .build();
+
+        assertEquals("johndoe", user.getUsername());
+    }
+
+    @Test
+    void testIsAccountNonExpired() {
+        User user = new User();
+
+        assertTrue(user.isAccountNonExpired());
+    }
+
+    @Test
+    void testIsAccountNonLocked() {
+        User user = new User();
+
+        assertTrue(user.isAccountNonLocked());
+    }
+
+    @Test
+    void testIsCredentialsNonExpired() {
+        User user = new User();
+
+        assertTrue(user.isCredentialsNonExpired());
+    }
+
+    @Test
+    void testIsEnabled() {
+        User user = User.builder()
+                .enabled(true)
+                .build();
+
+        assertTrue(user.isEnabled());
+    }
+}