Spring boot test configuration

问题

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!

回答1:

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
}

回答2:

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);
    }