JUnit testing got initializationError with java.lang.Exception: No tests found matching

Question

When running JUnit testing , it gave an initializationError: No tests found matching. Like this:

prodapi-main-junit
initializationError(org.junit.runner.man         


        

Answer 1

I had the similar problem and later realized that my main spring boot application configuration was not scanning through the packages that had my test classes in

Main class was scanning packages - {"com.mycmp.prj.pkg1", "com.mycmp.prj.pkg2", "com.mycmp.dependentprj.pkg5"}

Test class was in package - com.mycmp.prj.pkg3

Problem got fixed by fixing our base packages to scan all packages from current project and only scan limited needed packages from dependent libraries

---

Main java class

@SpringBootApplication(scanBasePackages = {"com.mycmp.prj.pkg1", "com.mycmp.prj.pkg2", "com.mycmp.dependentprj.pkg5"})
public class MyApplication extends SpringBootServletInitializer {

    public static void main(final String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }

    @Override
    protected SpringApplicationBuilder configure(final SpringApplicationBuilder application) {
        return application.sources(MyApplication.class);
    }

    @Bean
    public FilterRegistrationBean<Filter> customFilters() {
      final FilterRegistrationBean<Filter> registration = new 
      FilterRegistrationBean<>();
      final Filter myFilter = new ServicesFilter();
      registration.setFilter(myFilter);
      registration.addUrlPatterns("/myurl1/*", "/myurl2/*");
      return registration;
    }

    @PostConstruct
    public void started() {
      //
    }
}

My Test Class

**package com.mycmp.prj.pkg3;**

import static org.junit.Assert.assertNotNull;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import com.mongodb.MongoClient;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = MyApplication.class)
public class MongoConfigStoreTest {

  @Test
  public void testConnection() throws Exception {

    final MongoClient client = new MongoClient("localhost", 127027);
    assertNotNull(client);
    assertNotNull(client.getDatabase("localhost"));

  }
}

Answer 2

Had the same issue with PowerMock @RunWith(PowerMockRunner.class) then discovered that my @Test was the wrong implementation. Was using import org.junit.jupiter.api.Test;

I switched to import org.junit.Test; and that fixed the problem for me.

Answer 3

Check for below conditions:

1. Have you used org.junit.jupiter.api.Test; instead of org.junit.Test; for running Junit 4 test cases?
2. Have you passed an argument to the test method as shown below:

public void test(String arg){ assertTrue(true); }

3. Re-building a project will also work:

   mvn clean install

Answer 4

I had to add the hamcrest-all-1.3.jar into classpath to run unit test.

junit 4.12

java.lang.Exception: No tests found matching [{ExactMatcher:fDisplayName=myTest], {ExactMatcher:fDisplayName=scannerTest(example.JavaTest)], {LeadingIdentifierMatcher:fClassName=example.JavaTest,fLeadingIdentifier=myTest]] from org.junit.internal.requests.ClassRequest@38af3868
    at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:40)

Answer 5

If it is a maven project run eclipse:eclipse as a Maven build.That resolved my problem.

Answer 6

First able Make sure that your methods annotated @test as well as the test class are public.