Makes ehchache migration multi-module aware for Spring Boot 3 upgrade

applications/spring-shell/src/test/java/org/springframework/sbm/BootUpgrade_27_30_MultiModule_IntegrationTest.java

@@ -16,8 +16,19 @@
 
 package org.springframework.sbm;
 
+import org.jetbrains.annotations.NotNull;
 import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
+import org.openrewrite.maven.MavenParser;
+import org.openrewrite.maven.tree.Dependency;
+import org.openrewrite.maven.tree.MavenResolutionResult;
+import org.openrewrite.xml.tree.Xml;
+
+import java.nio.file.Path;
+import java.util.List;
+import java.util.Optional;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
 
 public class BootUpgrade_27_30_MultiModule_IntegrationTest  extends IntegrationTestBaseClass {
     @Override
@@ -35,6 +46,81 @@ void migrateMultiModuleApplication() {
         applyRecipe("boot-2.7-3.0-dependency-version-update");
 
         buildProject();
+
+        verifyParentPomVersion();
+        verifyEhCacheVersionIsUpgraded();
+    }
+
+    private void verifyEhCacheVersionIsUpgraded() {
+        Optional<Dependency> ehcacheResult = getDependencyByArtifactId("ehcache", "spring-app/");
+
+        assertThat(ehcacheResult).isPresent();
+
+        Dependency ehcacheDependency = ehcacheResult.get();
+
+        assertThat(ehcacheDependency.getArtifactId()).isEqualTo("ehcache");
+        assertThat(ehcacheDependency.getGav().getGroupId()).isEqualTo("org.ehcache");
+        assertThat(ehcacheDependency.getGav().getVersion()).isNull();
+        assertThat(ehcacheDependency.getClassifier()).isEqualTo("jakarta");
+    }
+
+    private Optional<Dependency> getDependencyByArtifactId(String artifactId, String module) {
+        Xml.Document mavenAsXMLDocument = getBuildFileByModule(module);
+        List<Dependency> dependencies = getDependencies(mavenAsXMLDocument);
+        return dependencies
+                .stream()
+                .filter(dependency -> dependency.getArtifactId().equals(artifactId))
+                .findFirst();
+    }
+
+    private List<Dependency> getDependencies(Xml.Document mavenAsXMLDocument) {
+        return mavenAsXMLDocument
+                .getMarkers()
+                .findFirst(MavenResolutionResult.class)
+                .get()
+                .getPom()
+                .getRequestedDependencies();
+    }
+
+    private void verifyParentPomVersion() {
+        Xml.Document mavenAsXMLDocument = getRootBuildFile();
+
+        Xml.Tag parentTag = mavenAsXMLDocument
+                .getRoot()
+                .getChildren("parent").get(0);
+
+        String version = parentTag.getChildValue("version").get();
+
+        String groupId = parentTag.getChildValue("groupId").get();
+        String artifactId = parentTag.getChildValue("artifactId").get();
+
+        assertThat(version).isEqualTo("3.0.0-M3");
+        assertThat(groupId).isEqualTo("org.springframework.boot");
+        assertThat(artifactId).isEqualTo("spring-boot-starter-parent");
+    }
+
+    @NotNull
+    private Xml.Document getRootBuildFile() {
+        return parsePom(loadFile(Path.of("pom.xml")));
+    }
+
+    @NotNull
+    private Xml.Document getBuildFileByModule(String app) {
+
+        return parseSubmodulePom(loadFile(Path.of("pom.xml")), loadFile(Path.of(app + "pom.xml")));
+    }
+
+
+    @NotNull
+    private Xml.Document parsePom(String pomContent) {
+        MavenParser mavenParser = new MavenParser.Builder().build();
+        return mavenParser.parse(pomContent).get(0);
+    }
+
+    @NotNull
+    private Xml.Document parseSubmodulePom(String parentPom, String pomContent) {
+        MavenParser mavenParser = new MavenParser.Builder().build();
+        return mavenParser.parse(parentPom, pomContent).get(1);
     }
 
     private void buildProject() {