Add tests for Controller layer

src/main/java/by/andd3dfx/templateapp/error/GlobalExceptionHandler.java

@@ -0,0 +1,60 @@
+package by.andd3dfx.templateapp.error;
+
+import by.andd3dfx.templateapp.error.dto.ExceptionResponse;
+import by.andd3dfx.templateapp.error.exception.NotFoundException;
+import by.andd3dfx.templateapp.error.exception.UnauthorizedException;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
+
+import java.time.LocalDateTime;
+
+/**
+ * Add more methods if needed.
+ */
+@ControllerAdvice
+public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
+
+    /**
+     * 401.
+     */
+    @ExceptionHandler(UnauthorizedException.class)
+    public ResponseEntity<ExceptionResponse> handleUnauthorizedException(UnauthorizedException ex) {
+        return buildResponseEntity(ex, HttpStatus.UNAUTHORIZED);
+    }
+
+    /**
+     * 404.
+     */
+    @ExceptionHandler(NotFoundException.class)
+    public ResponseEntity handleResourceNotFoundException(NotFoundException ex) {
+        return buildResponseEntity(ex, HttpStatus.NOT_FOUND);
+    }
+
+    /**
+     * 409.
+     */
+    @ExceptionHandler({IllegalArgumentException.class, IllegalStateException.class})
+    public ResponseEntity handleIllegalExceptions(RuntimeException ex) {
+        return buildResponseEntity(ex, HttpStatus.CONFLICT);
+    }
+
+    /**
+     * 500.
+     * Throw exception for any other unpredicted reason.
+     * Avoid modification of this method to make problem visible in logs.
+     * Don't delete this method to avoid descendants declare it and catch 'any error'.
+     */
+    @ExceptionHandler(Exception.class)
+    public final ResponseEntity handleOtherExceptions(Exception ex) throws Exception {
+        throw ex;
+    }
+
+    private ResponseEntity<ExceptionResponse> buildResponseEntity(Exception ex, HttpStatus httpStatus) {
+        return ResponseEntity
+                .status(httpStatus)
+                .body(new ExceptionResponse(ex.getMessage(), httpStatus.name(), LocalDateTime.now()));
+    }
+}

src/main/java/by/andd3dfx/templateapp/error/dto/ExceptionResponse.java

@@ -0,0 +1,17 @@
+package by.andd3dfx.templateapp.error.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class ExceptionResponse {
+
+    private String message;
+    private String code;
+    private LocalDateTime timestamp;
+}

src/main/java/by/andd3dfx/templateapp/exceptions/ArticleNotFoundException.java → src/main/java/by/andd3dfx/templateapp/error/exception/ArticleNotFoundException.java

@@ -1,4 +1,4 @@
-package by.andd3dfx.templateapp.exceptions;
+package by.andd3dfx.templateapp.error.exception;
 
 public class ArticleNotFoundException extends NotFoundException {
 

src/main/java/by/andd3dfx/templateapp/error/exception/NotFoundException.java

@@ -0,0 +1,8 @@
+package by.andd3dfx.templateapp.error.exception;
+
+public abstract class NotFoundException extends RuntimeException {
+
+    public NotFoundException(String name, Long id) {
+        super(String.format("Could not find %s by id=%d", name, id));
+    }
+}

src/main/java/by/andd3dfx/templateapp/error/exception/UnauthorizedException.java

@@ -0,0 +1,8 @@
+package by.andd3dfx.templateapp.error.exception;
+
+public class UnauthorizedException extends RuntimeException {
+
+    public UnauthorizedException(String message) {
+        super(message);
+    }
+}

src/main/java/by/andd3dfx/templateapp/services/impl/ArticleService.java

@@ -2,14 +2,12 @@
 
 import by.andd3dfx.templateapp.dto.ArticleDto;
 import by.andd3dfx.templateapp.dto.ArticleUpdateDto;
-import by.andd3dfx.templateapp.exceptions.ArticleNotFoundException;
+import by.andd3dfx.templateapp.error.exception.ArticleNotFoundException;
 import by.andd3dfx.templateapp.mappers.ArticleMapper;
 import by.andd3dfx.templateapp.persistence.dao.ArticleRepository;
 import by.andd3dfx.templateapp.persistence.entities.Article;
 import by.andd3dfx.templateapp.services.IArticleService;
 import lombok.RequiredArgsConstructor;
-import org.springframework.dao.EmptyResultDataAccessException;
-import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Slice;
 import org.springframework.stereotype.Service;