springboot project with multiple module and multiple main class -unit test failing

I am trying to write unit test cases for an existing application with multiple module having main classes in each of them. There are more than one class having @SpringBootApplication. I have written a simple test case which is failing with following error. How can I continue with my test case for one of them.

java.lang.IllegalStateException: Found multiple
@SpringBootConfiguration annotated classes [Generic bean: class
[com.marketshare.ReportingMainClass]; scope=; abstract=false;
lazyInit=false; autowireMode=0; dependencyCheck=0;
autowireCandidate=true; primary=false; factoryBeanName=null;
factoryMethodName=null; initMethodName=null; destroyMethodName=null;
defined in file [C:My
Dataworkspaceservices2microservicesReporting-MicroservicebuildclassesjavamaincommarketshareReportingMainClass.class],
Generic bean: class [com.marketshare.SharedMain]; scope=;
abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0;
autowireCandidate=true; primary=false; factoryBeanName=null;
factoryMethodName=null; initMethodName=null; destroyMethodName=null;
defined in URL
[jar:file:/C:/My%20Data/workspace/services2/microservices/Shared-Module/build/libs/Shared-Module-1.0-SNAPSHOT.jar!/com/marketshare/SharedMain.class]]
at org.springframework.util.Assert.state(Assert.java:70)
at org.springframework.boot.test.context.SpringBootConfigurationFinder.scanPackage(SpringBootConfigurationFinder.java:69)
at org.springframework.boot.test.context.SpringBootConfigurationFinder.findFromPackage(SpringBootConfigurationFinder.java:59)
at org.springframework.boot.test.context.SpringBootConfigurationFinder.findFromClass(SpringBootConfigurationFinder.java:52)

Here is the code snippet

@RunWith(SpringRunner.class)
@WebMvcTest(CustomReportController.class)
public class CustomReportControllerTest




I just want to unit test my controller. BTW I am new to spring world.

3 Answers
3

The @RunWith(SpringRunner.class) will load the spring context. To test just the controller you can use

@RunWith(MockitoJUnitRunner.class)
public class CustomReportControllerTest




There is a simple approach, you can creatae a new Spring Boot Application, let's say TestApplication under your test source folder, just like

TestApplication

test

srctestjavacomexampleTestApplication.java

@SpringBootApplication
@EnableAutoConfiguration
@ComponentScan("......").
@EnableAsync
public class TestApplication

public static void main(String args)
SpringApplication.run(TestApplication.class, args);





and add your package into the @ComponentScan, you can get all the spring boot capacities and only applicable to the test propose.

@ComponentScan

Add @SpringBootTest
@RunWith(SpringRunner.class)
@AutoConfigureMockMvc
Use these annotations on the test class and Autowire MockMvc and then you can use mockMvc.perform to test Controller methods

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