How to test main class of Spring-boot application

Question

I have a spring-boot application where my @SpringBootApplication starter class looks like a standard one. So I created many tests for all my functi

Answer 1

This simple mock test for SpringApplication does not invoke any methods but just tests the starter app. [uses PowerMockRunner.class]

import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PowerMockIgnore;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import org.springframework.boot.SpringApplication;

@RunWith(PowerMockRunner.class)
@PowerMockIgnore({"com.sun.org.apache.xerces.*", "javax.xml.*", "org.xml.*", "javax.management.*"})
public class JobsAppStarterTest {

    @Test
    @PrepareForTest(SpringApplication.class)
    public void testSpringStartUp() {
        PowerMockito.mockStatic(SpringApplication.class);
        SpringApplication.run(JobsAppStarter.class, new String[] {"args"});
        JobsAppStarter.main(new String[] {"args"});
    }
}