GH-31 - Fix build resource file detection for test execution optimizations.

spring-modulith-junit/src/main/java/org/springframework/modulith/junit/Changes.java

@@ -255,7 +255,13 @@ public class Changes implements Iterable<Change> {
 		record OtherFileChange(String path) implements Change {
 
 			private static final Collection<String> CLASSPATH_RESOURCES = Set.of("src/main/resources", "src/test/resources");
-			private static final Collection<String> BUILD_FILES = Set.of("build.gradle", "build.kt", "pom.xml");
+			private static final Collection<String> BUILD_FILES = Set.of(
+
+					// Gradle
+					"build.gradle", "build.gradle.kts", "gradle.properties", "settings.gradle", "settings.gradle.kts",
+
+					// Maven
+					"pom.xml");
 
 			/**
 			 * Returns whether the change affects a build resource.

spring-modulith-junit/src/test/java/org/springframework/modulith/junit/ChangesUnitTests.java

@@ -49,7 +49,13 @@ class ChangesUnitTests {
 	@TestFactory // GH-31
 	Stream<DynamicTest> detectsNonClasspathFileChange() {
 
-		var files = Stream.of("pom.xml", "build.gradle", "build.kt");
+		var files = Stream.of(
+
+				// Maven
+				"pom.xml",
+
+				// Gradle
+				"build.gradle", "build.gradle.kts", "gradle.properties", "settings.gradle", "settings.gradle.kts");
 
 		return DynamicTest.stream(files, it -> it + " is considered build resource", it -> {
 

src/docs/antora/modules/ROOT/pages/testing.adoc

@@ -395,7 +395,7 @@ Tests will be selected for execution if they reside in either a root module, a m
 The optimization will back off optimizing the execution under the following circumstances:
 
 * The test execution originates from an IDE as we assume the execution is triggered explicitly.
-* The set of changes contains a change to a resource related to a build system (`pom.xml`, `build.gradle`, `gradle.properties`).
+* The set of changes contains a change to a resource related to a build system (`pom.xml`, `build.gradle(.kts)`, `gradle.properties`, and `settings.gradle(.kts)`).
 * The set of changes contains a change to any classpath resource.
 * The project does not contain a change at all (typical in a CI build).