Polish configuration related to predictive test selection

Most notably, this commit splits the tests that use Spring REST Docs
out into a separate task for which predictive test selection is
disabled. This allows it to be cached and use Gradle's built-in
up-to-date checking, thereby avoiding the generation of new snippets
and the need to then run the asciidoctor and asciidoctorPdf tasks.

It also updates spring-boot-smoke-test-junit-vintage to disable
predictive test selection so that we can continue to assert that
the some tests were executed.

See gh-35869

buildSrc/src/main/java/org/springframework/boot/build/JavaConventions.java

@@ -190,9 +190,7 @@ class JavaConventions {
 		if (isPredictiveTestSelectionEnabled()) {
 			PredictiveTestSelectionExtension predictiveTestSelection = test.getExtensions()
 				.getByType(PredictiveTestSelectionExtension.class);
-			predictiveTestSelection.getEnabled().set(true);
+			predictiveTestSelection.getEnabled().convention(true);
-			predictiveTestSelection.mustRun((mustRun) -> mustRun.getIncludeClasses()
-				.add("org.springframework.boot.actuate.autoconfigure.endpoint.web.documentation.*"));
 		}
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/build.gradle

@@ -196,26 +196,10 @@ dependencies {
 	testRuntimeOnly("org.springframework.security:spring-security-saml2-service-provider")
 }
 
-test {
-	outputs.dir("${buildDir}/generated-snippets")
-}
-
 task dependencyVersions(type: org.springframework.boot.build.constraints.ExtractVersionConstraints) {
 	enforcedPlatform(":spring-boot-project:spring-boot-dependencies")
 }
 
-tasks.withType(org.asciidoctor.gradle.jvm.AbstractAsciidoctorTask) {
-	dependsOn dependencyVersions
-	doFirst {
-		def versionConstraints = dependencyVersions.versionConstraints
-		def integrationVersion = versionConstraints["org.springframework.integration:spring-integration-core"]
-		def integrationDocs = String.format("https://docs.spring.io/spring-integration/docs/%s/reference/html/", integrationVersion)
-		attributes "spring-integration-docs": integrationDocs
-	}
-	dependsOn test
-	inputs.dir("${buildDir}/generated-snippets").withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName("generatedSnippets")
-}
-
 asciidoctor {
 	sources {
 		include "index.adoc"
@@ -243,3 +227,31 @@ task zip(type: Zip) {
 artifacts {
 	documentation zip
 }
+
+tasks.named("test") {
+	filter {
+		excludeTestsMatching("org.springframework.boot.actuate.autoconfigure.endpoint.web.documentation.*")
+	}
+}
+
+def documentationTest = tasks.register("documentationTest", Test) {
+	filter {
+		includeTestsMatching("org.springframework.boot.actuate.autoconfigure.endpoint.web.documentation.*")
+	}
+	outputs.dir("${buildDir}/generated-snippets")
+	predictiveSelection {
+		enabled = false
+	}
+}
+
+tasks.withType(org.asciidoctor.gradle.jvm.AbstractAsciidoctorTask) {
+	dependsOn dependencyVersions
+	doFirst {
+		def versionConstraints = dependencyVersions.versionConstraints
+		def integrationVersion = versionConstraints["org.springframework.integration:spring-integration-core"]
+		def integrationDocs = String.format("https://docs.spring.io/spring-integration/docs/%s/reference/html/", integrationVersion)
+		attributes "spring-integration-docs": integrationDocs
+	}
+	dependsOn documentationTest
+	inputs.dir("${buildDir}/generated-snippets").withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName("generatedSnippets")
+}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-junit-vintage/build.gradle

@@ -23,4 +23,7 @@ test {
 			}
 	 	}
 	}
+	predictiveSelection {
+		enabled = false
+	}
 }