Backend: update for search

backend/src/main/java/com/github/tingshi2015/backend/exception/GlobalExceptionHandler.java

@@ -15,4 +15,10 @@ public class GlobalExceptionHandler {
     public ErrorMessage handleNoSuchElementException(NoSuchElementException exception){
         return new ErrorMessage(exception.getMessage());
     }
+
+    @ExceptionHandler(InvalidReminderException.class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    public ErrorMessage handleInvalidReminderException(InvalidReminderException exception){
+        return new ErrorMessage(exception.getMessage());
+    }
 }

backend/src/main/java/com/github/tingshi2015/backend/exception/InvalidReminderException.java

@@ -0,0 +1,7 @@
+package com.github.tingshi2015.backend.exception;
+
+public class InvalidReminderException extends RuntimeException{
+    public InvalidReminderException(String message){
+        super(message);
+    }
+}

backend/src/main/java/com/github/tingshi2015/backend/reminder/ReminderService.java

@@ -1,5 +1,6 @@
 package com.github.tingshi2015.backend.reminder;
 
+import com.github.tingshi2015.backend.exception.InvalidReminderException;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
@@ -30,6 +31,9 @@ public List<Reminder> getAllReminders() {
     }
 
     public Reminder createAReminder(ReminderDTO reminderDTO) {
+        if(reminderDTO.name() == null && reminderDTO.time() == null && reminderDTO.date() == null){
+            throw new InvalidReminderException("Reminder must have at least one non-null filed!");
+        }
         Reminder reminderToRepo = convertToEntity(reminderDTO);
         return reminderRepository.save(reminderToRepo);
     }

backend/src/test/java/com/github/tingshi2015/backend/reminder/ReminderServiceTest.java

@@ -1,5 +1,6 @@
 package com.github.tingshi2015.backend.reminder;
 
+import com.github.tingshi2015.backend.exception.InvalidReminderException;
 import org.junit.jupiter.api.Test;
 
 import java.time.LocalDate;
@@ -36,7 +37,7 @@ void getAllReminders() {
     }
 
     @Test
-    void createAReminder() {
+    void createAReminder_withValidFields_shouldSaveReminder() {
         //GIVEN
         ReminderDTO newReminder = new ReminderDTO("name1", LocalTime.of(17, 0, 0), LocalDate.of(2024, 6, 25));
         Reminder reminderToSave = new Reminder("id1", "name1", LocalTime.of(17, 0, 0), LocalDate.of(2024, 6, 25));
@@ -51,6 +52,42 @@ void createAReminder() {
         verify(idService).randomId();
         verify(reminderRepository).save(reminderToSave);
         assertEquals(reminderToSave, actual);
+        assertNotNull(actual);
+    }
+
+    @Test
+    void createAReminder_withAllFieldsNull_shouldThrowInvalidReminderException() {
+        //GIVEN
+        ReminderDTO newReminder = new ReminderDTO(null, null, null);
+
+        //WHEN
+        InvalidReminderException exception = assertThrows(InvalidReminderException.class, () -> reminderService.createAReminder(newReminder));
+
+
+        //THEN
+        verify(reminderRepository, never()).save(any(Reminder.class));
+        assertEquals("Reminder must have at least one non-null filed!", exception.getMessage());
+
+    }
+
+    @Test
+    void createAReminder_withNullName_shouldSaveReminder() {
+        //GIVEN
+        ReminderDTO newReminder = new ReminderDTO(null, LocalTime.of(17, 0, 0), LocalDate.now());
+        Reminder reminderToSave = new Reminder("id1", null, LocalTime.of(17, 0, 0), LocalDate.now());
+
+        when(idService.randomId()).thenReturn("id1");
+        when(reminderRepository.save(any(Reminder.class))).thenReturn(reminderToSave);
+
+        //WHEN
+        Reminder actual = reminderService.createAReminder(newReminder);
+
+        //THEN
+        verify(idService).randomId();
+        verify(reminderRepository).save(reminderToSave);
+        assertEquals(reminderToSave, actual);
+        assertNotNull(actual);
+
     }