desruisseaux commented on code in PR #11632:
URL: https://github.com/apache/maven/pull/11632#discussion_r2751416305
##########
impl/maven-core/src/test/java/org/apache/maven/project/ProjectBuilderTest.java:
##########
@@ -470,4 +478,257 @@ void
testModularSourcesWithExplicitResourcesIssuesWarning() throws Exception {
assertTrue(mainModules.contains("org.foo.moduleA"), "Should have
resource root for moduleA");
assertTrue(mainModules.contains("org.foo.moduleB"), "Should have
resource root for moduleB");
}
+
+ /**
+ * Tests that legacy sourceDirectory and testSourceDirectory are ignored
in modular projects.
+ * <p>
+ * In modular projects, legacy directories are unconditionally ignored
because it is not clear
+ * how to dispatch their content between different modules. A warning is
emitted if these
+ * properties are explicitly set (differ from Super POM defaults).
+ * <p>
+ * This verifies:
+ * - WARNINGs are emitted for explicitly set legacy directories in modular
projects
+ * - sourceDirectory and testSourceDirectory are both ignored
+ * - Only modular sources from {@code <sources>} are used
+ * <p>
+ * Acceptance Criteria:
+ * - AC1 (boolean flags eliminated - uses hasSources() for main/test
detection)
+ * - AC7 (legacy directories warning - {@code <sourceDirectory>} and
{@code <testSourceDirectory>}
+ * are unconditionally ignored with a WARNING in modular projects)
+ *
+ * @see <a href="https://github.com/apache/maven/issues/11612";>Issue
#11612</a>
+ */
+ @Test
+ void testMixedSourcesModularMainClassicTest() throws Exception {
+ File pom = getProject("mixed-sources");
+
+ MavenSession mavenSession = createMavenSession(null);
+ ProjectBuildingRequest configuration = new
DefaultProjectBuildingRequest();
+
configuration.setRepositorySession(mavenSession.getRepositorySession());
+
+ ProjectBuildingResult result = getContainer()
+ .lookup(org.apache.maven.project.ProjectBuilder.class)
+ .build(pom, configuration);
+
+ MavenProject project = result.getProject();
+
+ // Verify WARNINGs are emitted for explicitly set legacy directories
+ List<ModelProblem> warnings = result.getProblems().stream()
+ .filter(p -> p.getSeverity() == ModelProblem.Severity.WARNING)
+ .filter(p -> p.getMessage().contains("Legacy") &&
p.getMessage().contains("ignored in modular project"))
+ .toList();
+
+ // Should have 2 warnings: one for sourceDirectory, one for
testSourceDirectory
+ assertEquals(2, warnings.size(), "Should have 2 warnings for ignored
legacy directories");
+ assertTrue(
+ warnings.stream().anyMatch(w ->
w.getMessage().contains("<sourceDirectory>")),
+ "Should warn about ignored <sourceDirectory>");
+ assertTrue(
+ warnings.stream().anyMatch(w ->
w.getMessage().contains("<testSourceDirectory>")),
+ "Should warn about ignored <testSourceDirectory>");
+
+ // Get main Java source roots - should have modular sources, not
classic sourceDirectory
+ List<SourceRoot> mainJavaRoots =
project.getEnabledSourceRoots(ProjectScope.MAIN, Language.JAVA_FAMILY)
+ .toList();
+
+ // Should have 2 modular main Java sources (moduleA and moduleB)
+ assertEquals(2, mainJavaRoots.size(), "Should have 2 modular main Java
source roots");
+
+ Set<String> mainModules = mainJavaRoots.stream()
+ .map(SourceRoot::module)
+ .filter(opt -> opt.isPresent())
+ .map(opt -> opt.get())
Review Comment:
The two lines `filter` followed by `map` can be replaced by this single line:
```java
.flatMap(Optional::stream)
```
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