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, Jul 22 '16 at 15:02
thank you, I managed to resolve this. It was a bad configuration. — sansari, Jul 23 '16 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, Sep 22 '16 at 20:42

score 16 · Answer 1 · edited Dec 03 '19 at 02:46

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 03 '19 at 02:46

Imran

5,542
3
23
46

answered Nov 04 '16 at 18:17

Mike3355

11,305
24
96
184

score 8 · Answer 2 · edited Sep 13 '19 at 20:13

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);
    }

score 2 · Answer 3 · edited May 23 '17 at 12:26

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 '17 at 12:26

Community

1
1

answered Nov 04 '16 at 17:13

zeagord

2,257
3
17
24

score 0 · Answer 4 · answered Feb 06 '18 at 21:54

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 06 '18 at 21:54

Deepak Bhatia

1

Spring boot test configuration

4 Answers4

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