Adding UnnecessarySpringExtension to boot migration.

src/main/resources/META-INF/rewrite/spring-boot2.yml

@@ -38,6 +38,7 @@ recipeList:
         # There is a third variant of this class in spring-cloud-commons and there is not yet a suitable migration
         # path. Once one exists, this can likely be added for removal as well.
         #- org.springframework.cloud.test.ModifiedClassPathRunner
+  - org.openrewrite.java.spring.boot2.UnnecessarySpringExtension
   - org.openrewrite.maven.AddDependency:
       groupId: org.springframework.boot
       artifactId: spring-boot-tools
@@ -56,6 +57,7 @@ tags:
 recipeList:
   - org.openrewrite.java.spring.NoRequestMappingAnnotation
   - org.openrewrite.java.spring.ImplicitWebAnnotationNames
+  - org.openrewrite.java.spring.boot2.UnnecessarySpringExtension
 ---
 type: specs.openrewrite.org/v1beta/recipe
 name: org.openrewrite.java.spring.boot2.SpringBoot1To2Migration

src/test/kotlin/org/openrewrite/java/spring/boot2/SpringBootMigrationTest.kt

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2020 the original author or authors.
+ * <p>
+ * 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
+ * <p>
+ * https://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.openrewrite.java.spring.org.openrewrite.java.spring.boot2
+
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.ValueSource
+import org.openrewrite.Issue
+import org.openrewrite.Parser
+import org.openrewrite.Recipe
+import org.openrewrite.config.Environment
+import org.openrewrite.java.JavaParser
+import org.openrewrite.java.JavaRecipeTest
+import org.openrewrite.java.spring.boot2.UnnecessarySpringExtension
+
+class SpringBootMigrationTest : JavaRecipeTest {
+
+    override val recipe: Recipe
+        get() = Environment.builder()
+            .scanRuntimeClasspath("org.openrewrite.java.spring")
+            .build()
+            .activateRecipes("org.openrewrite.java.spring.boot2.SpringBoot1To2Migration")
+
+    @Issue("https://github.com/openrewrite/rewrite-spring/issues/43")
+    @Test
+    fun springBootRunWithRemovedNoExtension() = assertChanged(
+        parser = JavaParser.fromJavaVersion()
+            .classpath("spring-boot-test", "junit-jupiter-api", "junit", "spring-test")
+            .logCompilationWarningsAndErrors(true)
+
+            .build(),
+        recipe = Environment.builder()
+            .scanRuntimeClasspath("org.openrewrite.java.spring")
+            .build()
+            .activateRecipes("org.openrewrite.java.spring.boot2.SpringBoot1To2Migration"),
+        before = """
+            package org.springframework.samples.petclinic.system;
+            
+            import org.junit.Test;
+            import org.junit.runner.RunWith;
+            import org.springframework.boot.test.context.SpringBootTest;
+            import org.springframework.test.context.junit4.SpringRunner;
+            
+            @SpringBootTest
+            @RunWith(SpringRunner.class)
+            public class ProductionConfigurationTests {
+            
+                @Test
+                public void testFindAll() {
+                }
+            }
+        """,
+        after = """
+            package org.springframework.samples.petclinic.system;
+            
+            import org.junit.jupiter.api.Test;
+            import org.springframework.boot.test.context.SpringBootTest;
+            
+            @SpringBootTest
+            public class ProductionConfigurationTests {
+            
+                @Test
+                public void testFindAll() {
+                }
+            }
+        """
+    )
+}