GH-253 - Let @ApplicationModuleTest be meta-annotated with @SpringBootTest.

@ApplicationModuleTest is now meta-annotated with @SpringBootTest. This allows us to remove a couple of declarations that we actually had copied from it (such as the TestContextBootstrapper, the SpringExtension etc.)

The presence of the original annotation allow test-related auto-configuration to inspect @SprignBootTest for particular configuration. For example, we now alias the WebEnvironment to make it configurable for the test execution.

spring-modulith-integration-test/src/test/java/com/acme/myproject/moduleA/ApplicationModuleTestIntegrationTests.java

@@ -15,9 +15,16 @@
  */
 package com.acme.myproject.moduleA;
 
+import static org.assertj.core.api.Assertions.*;
+
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.context.ApplicationContext;
 import org.springframework.modulith.test.ApplicationModuleTest;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.web.reactive.server.WebTestClient;
 
 /**
  * Integration tests for {@link ApplicationModuleTest}.
@@ -36,4 +43,19 @@ class ApplicationModuleTestIntegrationTests {
 		@Test // GH-173
 		void bootstrapsSecondLevelMestMethod() {}
 	}
+
+	// GH-253
+	@Nested
+	@ApplicationModuleTest(verifyAutomatically = false)
+	@ContextConfiguration
+	@AutoConfigureWebTestClient
+	class SampleTest {
+
+		@Autowired ApplicationContext context;
+
+		@Test
+		void registersTestWebClient() {
+			assertThat(context.getBean(WebTestClient.class)).isNotNull();
+		}
+	}
 }