#MicronautTest does not start the embedded server - testing

Question

I am writing a Spock test for controllers in an app using Micronaut. When using #MicronautTest(application=Application), it throws exception with message #MicronautTest used on test but no bean definition for the test present..
On examining the code, I see the following 2 reasons why Micronaut throws this exception. From io.micronaut.test.extensions.spock.MicronautSpockExtension :
if (this.specDefinition == null) {
if (!this.isTestSuiteBeanPresent((Class)spec.getReflection())) {
throw new InvalidSpecException("#MicronautTest used on test but no bean definition for the test present. This error indicates a misconfigured build or IDE. Please add the 'micronaut-inject-java' annotation processor to your test processor path (for Java this is the testAnnotationProcessor scope, for Kotlin kaptTest and for Groovy testCompile). See the documentation for reference: https://micronaut-projects.github.io/micronaut-test/latest/guide/");
}
...
}
My POM configuration is:
<plugin>
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>1.6</version>
<executions>
<execution>
<goals>
<goal>addTestSources</goal>
<goal>addSources</goal>
<goal>compileTests</goal>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
<encoding>UTF-8</encoding>
<compilerArgs>
<arg>-parameters</arg>
</compilerArgs>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</path>
<path>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-inject-java</artifactId>
<version>${micronaut.version}</version>
</path>
<path>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-validation</artifactId>
<version>${micronaut.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
<executions>
<execution>
<id>test-compile</id>
<goals>
<goal>testCompile</goal>
</goals>
<configuration>
<compilerArgs>
<arg>-parameters</arg>
</compilerArgs>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</path>
<path>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-inject-java</artifactId>
<version>${micronaut.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</execution>
</executions>
</plugin>
If I do not define the annotation the test #MicronautTest, it seems that the application doesn't even start.
Below is the spec code:
#MicronautTest(application= Application)
#PropertySource(value = [
#Property(name='spec.name', value = 'EndpointSpec'),
#Property(name = 'endpoints.health.details-visible', value = 'ANONYMOUS'),
#Property(name = MongoSettings.EMBEDDED, value = 'true'),
])
class EndpointSpec extends Specification {
#Inject
EmbeddedServer embeddedServer
#Inject
ApplicationContext applicationContext
#Unroll
def "test health endpoint is working"() {
given: 'a RxHttpClient'
URL server = embeddedServer.getURL()
RxHttpClient client = new DefaultHttpClient(server, new DefaultHttpClientConfiguration(), '/management')
when: '/health is called'
HttpResponse response = client.toBlocking().exchange('/health')
then: 'response is 200 OK and contains valid headers'
response.status == HttpStatus.OK
response.headers.size() == 5
response.headers.contains('uber-trace-id')
response.headers.contains('Date')
response.headers.contains('content-type') && response.headers.get('content-type') == MediaType.APPLICATION_JSON
response.headers.contains('content-length')
response.headers.contains('connection')
//and: 'response contains valid HealthResult'
//HealthResult healthResult = response.body()
// Want to validate the health result here but nothing is present in body
}
}
How I can either defined the specDefinition value or mark the test in such a way that it is present as a bean definition and what is the reason for such a behavior. Any help would be greatly appreciated.

Answer 1

Micronaut-test makes the tests themselves beans. In order for a Groovy test to be a bean, you need to have micronaut-inject-groovy on the compilation path for test.

Answer 2

Yes, adding the micronaut-inject-groovy to your maven build will resolve the issue. Add the following.
<dependency>
<groupId>io.micronaut.test</groupId>
<artifactId>micronaut-test-spock</artifactId>
<scope>test</scope>
</dependency>