Spring boot test configuration

Question

I have a spring boot application with main class like below:

@SpringBootApplication
public class Application {

    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }
}

Now I want to test my services and created a base test class:

@SpringApplicationConfiguration(Application.class)
public abstract class TestBase {
}

When I run my test I get exception:

Caused by: java.lang.IllegalArgumentException: Can not load an ApplicationContext with a NULL 'contextLoader'. Consider annotating your test class with @ContextConfiguration.
    at org.springframework.util.Assert.notNull(Assert.java:115)
    at org.springframework.test.context.TestContext.loadApplicationContext(TestContext.java:117)
    at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:148)

Then I change my base test class using ContextConfiguration

@ContextConfiguration(classes = Application.class)
public abstract class TestBase {
}

This time I get DataSource initialization error. I am wondering why it is failing in first case and why in second case it does not load my application.properties where I have configured datasource.

Thank you!

Please include the declaration of the failing test class in addition to the TestBase class. — Sam Brannen
– Sam Brannen, Commented Jul 22, 2016 at 15:02
thank you, I managed to resolve this. It was a bad configuration. — sansari
– sansari, Commented Jul 23, 2016 at 15:53
@Fiftoine Hey, I did not change anything in my TestBase class, it was some dependency issues. I just used @SpringApplicationConfiguration(Application.class) on my TestBase to load configurations from Application. What is your problem if I could help you? — sansari
– sansari, Commented Sep 22, 2016 at 20:42

Imran · Accepted Answer · 2019-12-03 02:46:17Z

16

Something like that:

@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
public class ApplicationTest{

   @Autowired
   Foo foo; //whatever you are testing

   @Test
   public void FooTest() throws Exception{
     Foo f = foo.getFooById("22");
     assertEquals("9B", f.getCode); 
   }
 //TODO look into MockMVC for testing services
}

edited Dec 3, 2019 at 2:46

Imran

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answered Nov 4, 2016 at 18:17

Mike3355

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Comments

Matthias · Accepted Answer · 2019-09-13 20:13:22Z

Example for Testing with

Spring Boot
Spring Boot Test Configuration
JUnit 5
FreeMarker

You will not find all this so simple as below :) Took long time to find out .

Configuration :

@TestConfiguration
@PropertySource(value = "classpath:test.properties", encoding = "UTF-8")
public class GlobalConfig {

    @Bean(name = "JsonMapper")
    public JsonMapper jsonMapper() {

        return new JsonMapper();
    }

    @Bean(name = "ObjectMapper")
    public ObjectMapper objectMapper() {

        return new ObjectMapper();
    }

    @Bean(name = "Mapper")
    public Mapper dozer() {

        return new DozerBeanMapper();
    }

    @Bean(name = "Validator")
    public Validator validator() {

        return new DefaultValidatorAdapter();
    }

}

Actual Test File:

import freemarker.template.Configuration;
import global.GlobalConfig;
import org.apache.commons.io.FileUtils;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInstance;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit.jupiter.SpringExtension;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.List;


@ExtendWith(SpringExtension.class)
@SpringBootTest(classes = {GlobalConfig.class, MessagePersistManager.class, TemplateManager.class, FileOperationsManager.class, Configuration.class})
@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class MessagePersistManagerTest {

    @Autowired
    private MessagePersistManager messagePersistManager;

    @Autowired
    private TemplateManager templateManager;

    @Autowired
    private FileOperationsManager fileOperationsManager;

    @Autowired
    private Configuration freemarkerConfiguration;


    @Value("${channel.outbound.ftp.local.directory}")
    private String sepaFilesBasePath;

    @BeforeAll
    private void init() throws Exception {

        System.out.println("Creating Base Dir=" + sepaFilesBasePath);
        Files.createDirectories(Paths.get(sepaFilesBasePath));

        /* FreeMarker Configuration */
        freemarkerConfiguration.setClassForTemplateLoading(this.getClass(), "/templates/");

    }


    @AfterAll
    private void destroy() throws Exception {

        System.out.println("Deleting Base Dir=" + sepaFilesBasePath);
        FileUtils.deleteDirectory(new File(sepaFilesBasePath));

    }


    @Test
    void persistSepaFile() {
        messagePersistManager.persistSepaFile("sepaWinnings.xml", generateData());
        System.out.println("e");
        assert (true);
    }

Community · Accepted Answer · 2017-05-23 12:26:23Z

2

You should use initializers.

Please refer the below questions.

spring test not populating database configuration from application.properties

Spring boot, read yml properties via integration test case

edited May 23, 2017 at 12:26

CommunityBot

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answered Nov 4, 2016 at 17:13

zeagord

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Comments

Deepak Bhatia · Accepted Answer · 2018-02-06 21:54:45Z

0

I faced the same issue it is because my ServletInitializer was in the different package. Problem resolved after correcting the package structure.

answered Feb 6, 2018 at 21:54

Deepak Bhatia

1

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