Maven test failed on Spring @Autowired and jUnit 5
Review the following jUnit 5 examples to test a Spring 5 MVC web application.
TestWelcome.java
package com.mkyong.web;
import com.mkyong.web.config.SpringConfig;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.jupiter.SpringExtension;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
@ExtendWith(SpringExtension.class)
@WebAppConfiguration
@ContextConfiguration(classes = SpringConfig.class)
public class TestWelcome {
private MockMvc mockMvc;
@Autowired
private WebApplicationContext webAppContext;
@BeforeEach
public void setup() {
mockMvc = MockMvcBuilders.webAppContextSetup(webAppContext).build();
}
@Test
public void testWelcome() throws Exception {
this.mockMvc.perform(
get("/"))
.andDo(print())
.andExpect(status().isOk())
.andExpect(view().name("index"))
.andExpect(forwardedUrl("/WEB-INF/views/index.jsp"))
.andExpect(model().attribute("msg", "Hello World"));
}
@Test
public void testAbc() {
assertEquals(2, 1 + 1);
}
}
Tested ok with IntelliJ IDEA and Eclipse. But failed with Maven command – mvn test
, look like Maven test is unable to @Autowired
the WebApplicationContext
class.
D:\java-web-project>mvn test
com.mkyong.web.TestWelcome.testWelcome() Time elapsed: 0.181 sec <<< FAILURE!
java.lang.NullPointerException
at com.mkyong.web.TestWelcome.testWelcome(TestWelcome.java:40)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.326 s
[INFO] Finished at: 2018-10-05T16:39:18+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test
Solution
In above console, we noticed Maven is using the maven-surefire-plugin:2.12.4
, it is a bit outdated, may not support the jUnit 5 + Spring 5 integration.
To fix it, update to the latest 2.22.0
pom.xml
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.0</version>
</plugin>
</plugins>
</build>
This has not resolved the issue.
what is SpringConfig? Can’t find it anywhere in the post.
It worked. Thanks a lot.
Doesn’t work!