Docs fix and test

README.adoc

@@ -3,11 +3,11 @@
 
 image:https://img.shields.io/github/license/spring-projects-experimental/spring-boot-migrator[GitHub]
 image:https://img.shields.io/github/v/release/spring-projects-experimental/spring-boot-migrator[GitHub release (latest by date)]
-image:https://img.shields.io/github/downloads/spring-projects-experimental/spring-boot-migrator/0.12.0/total[GitHub release (latest by date)]
+image:https://img.shields.io/github/downloads/spring-projects-experimental/spring-boot-migrator/0.13.0/total[GitHub release (latest by date)]
 
 image:https://img.shields.io/badge/Join-Slack-green?logo=slack&color=007EC6&style=for-the-badge[link="https://join.slack.com/t/springbootmigrator/shared_invite/zt-1k6yxfi3b-MEQ_MM67qXufWtc~Tw6y9w"]
 image:https://img.shields.io/github/discussions/spring-projects-experimental/spring-boot-migrator?label=GitHub%20discussions&logo=GitHUb&style=for-the-badge[GitHub Discussions]
-image:https://img.shields.io/gitter/room/spring-boot-migrator/community?color=007EC6&logo=gitter&style=for-the-badge[Gitter]
+image:https://img.shields.io/gitter/room/spring-boot-migrator/community?color=007EC6&logo=gitter&style=for-the-badge[link="https://gitter.im/spring-boot-migrator/community"]
 
 [quote]
 ____

components/sbm-core/src/main/java/org/springframework/sbm/java/api/ProjectJavaSources.java

@@ -52,7 +52,7 @@ public interface ProjectJavaSources {
 
     List<MethodCall> findMethodCalls(String pattern);
 
-    List<JavaSourceAndType> findTypesImplementing(String jpaRepositoryInterface);
+    List<JavaSourceAndType> findTypesImplementing(String interfaceType);
 
     List<? extends JavaSource> findClassesUsingType(String databaseDriverGAE);
 }

components/sbm-core/src/test/java/org/springframework/sbm/java/impl/ProjectJavaSourcesImplTest.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2021 - 2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.sbm.java.impl;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.sbm.engine.context.ProjectContext;
+import org.springframework.sbm.java.api.JavaSourceAndType;
+import org.springframework.sbm.project.resource.TestProjectContext;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Fabian Krüger
+ */
+class ProjectJavaSourcesImplTest {
+
+    @Test
+    void findTypesImplementing() {
+        ProjectContext context = TestProjectContext.buildProjectContext().addJavaSource("src/main/java", """
+                package com.example;
+
+                public interface TheInterface {}
+                """).addJavaSource("src/main/java", """
+                package com.example;
+
+                public class TheClass implements TheInterface {}
+                """).build();
+
+        List<JavaSourceAndType> typesImplementingInterface = context
+                .getProjectJavaSources()
+                .findTypesImplementing("com.example.TheInterface");
+
+        assertThat(typesImplementingInterface).isNotEmpty();
+        assertThat(typesImplementingInterface.get(0).getType().getFullyQualifiedName()).isEqualTo("com.example.TheClass");
+    }
+
+    @Test
+    void findTypesImplementingInterfaceFromJdk() {
+        ProjectContext context = TestProjectContext.buildProjectContext()
+                .addJavaSource("src/main/java", """
+                package com.example;
+
+                import java.io.Serializable;
+
+                public class TheClass implements Serializable {}
+                """).build();
+
+        List<JavaSourceAndType> typesImplementingInterface = context
+                .getProjectJavaSources()
+                .findTypesImplementing("java.io.Serializable");
+
+        assertThat(typesImplementingInterface).isNotEmpty();
+        assertThat(typesImplementingInterface.get(0).getType().getFullyQualifiedName()).isEqualTo("com.example.TheClass");
+    }
+
+    @Test
+    void findTypesImplementingWithInterfaceFromJar() {
+        ProjectContext context = TestProjectContext.buildProjectContext()
+                .withBuildFileHavingDependencies("org.springframework:spring-context:5.3.23")
+                .addJavaSource("src/main/java", """
+                        package com.example;
+
+                        import org.springframework.beans.BeansException;
+                        import org.springframework.context.ApplicationContext;
+                        import org.springframework.context.ApplicationContextAware;
+
+                        public class TheClass implements ApplicationContextAware {                                                                      
+                            @Override
+                            public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
+                            }
+                        }
+                        """).build();
+
+        List<JavaSourceAndType> typesImplementingInterface = context
+                .getProjectJavaSources()
+                .findTypesImplementing("org.springframework.context.ApplicationContextAware");
+
+        assertThat(typesImplementingInterface).isNotEmpty();
+        assertThat(typesImplementingInterface.get(0).getType().getFullyQualifiedName()).isEqualTo("com.example.TheClass");
+    }
+
+
+}

docs/boot-3.0.0-M3-upgrade.adoc

@@ -29,12 +29,12 @@ Every section is declared in YAML
 ==== The Helper
 
 The `Helper` is condition and data provider for the template.
-It must implement `ìsApplicable` and `getData` from `SpringBootUpgradeReportSection.Helper`.
+It must implement `ìsApplicable` and `getData` from `SpringBootUpgradeReportSectionHelper`.
 All variables used in the template must be provided by `getData`.
 
 [source,java]
 ....
-    public interface Helper<T> extends Condition {
+    public abstract class SpringBootUpgradeReportSectionHelper<T> extends Condition {
         Map<String, T> getData(ProjectContext context);
     }
 ....