Tests for upload file

gistfile1.txt

package com.bezkoder.spring.files.csv;

import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.multipart;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

import java.nio.charset.StandardCharsets;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
//import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;

import com.bezkoder.spring.files.csv.controller.CSVController;
import com.bezkoder.spring.files.csv.service.CSVService;

@RunWith(SpringJUnit4ClassRunner.class)
public class SpringBootUploadCsvFilesApplicationTests {

	private MockMvc mockMvc;

	@Configuration
	static class Config {
		@Bean
		@Primary
		public CSVService fileServiceMock() {
			return Mockito.mock(CSVService.class);
		}
	}
	
	@Mock
    private CSVService service;
	
	@InjectMocks
    private CSVController controller;


	@BeforeEach
	public void setup() {
		MockitoAnnotations.initMocks(this);
        this.mockMvc = MockMvcBuilders.standaloneSetup(controller).build();
	}

	@Test
	void testUploadFile() throws Exception {
		String content = "Id,Title,Description,Published\n" + "1,Spring Boot Tut#1,Tut#1 Description,FALSE";
		byte[] fileContent = content.getBytes(StandardCharsets.UTF_8);
		MockMultipartFile filePart = new MockMultipartFile("file", "orig.csv", "text/csv", fileContent);
		this.mockMvc.perform(multipart("/api/csv/upload").file(filePart)).andExpect(status().isOk())
				.andExpect(content().contentType("application/json"));
	}

}