Add unit test for JUnit6BestPractices (#994)

Author: sullis

src/test/java/org/openrewrite/java/testing/junit/JUnit6BestPracticesTest.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2026 the original author or authors.
+ * <p>
+ * Licensed under the Moderne Source Available License (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://docs.moderne.io/licensing/moderne-source-available-license
+ * <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.testing.junit;
+
+import org.junit.jupiter.api.Test;
+import org.openrewrite.DocumentExample;
+import org.openrewrite.InMemoryExecutionContext;
+import org.openrewrite.java.JavaParser;
+import org.openrewrite.test.RecipeSpec;
+import org.openrewrite.test.RewriteTest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.openrewrite.java.Assertions.java;
+import static org.openrewrite.java.Assertions.javaVersion;
+import static org.openrewrite.maven.Assertions.pomXml;
+
+class JUnit6BestPracticesTest implements RewriteTest {
+
+    @Override
+    public void defaults(RecipeSpec spec) {
+        spec
+          .parser(JavaParser.fromJavaVersion()
+            .classpathFromResources(new InMemoryExecutionContext(), "junit-jupiter-api-5"))
+          .recipeFromResources("org.openrewrite.java.testing.junit.JUnit6BestPractices");
+    }
+
+    @DocumentExample
+    @Test
+    void junit5ToJunit6() {
+        rewriteRun(
+          java(
+            """
+              import org.junit.jupiter.api.MethodOrderer;
+              import org.junit.jupiter.api.TestMethodOrder;
+              import org.junit.jupiter.api.Test;
+
+              @TestMethodOrder(MethodOrderer.Alphanumeric.class)
+              public class MyTest {
+                  @Test
+                  public void test1() {
+                  }
+
+                  @Test
+                  public void test2() {
+                  }
+              }
+              """,
+            """
+              import org.junit.jupiter.api.MethodOrderer;
+              import org.junit.jupiter.api.TestMethodOrder;
+              import org.junit.jupiter.api.Test;
+
+              @TestMethodOrder(MethodOrderer.MethodName.class)
+              class MyTest {
+                  @Test
+                  void test1() {
+                  }
+
+                  @Test
+                  void test2() {
+                  }
+              }
+              """,
+            spec -> spec.markers(javaVersion(17))
+          ),
+          //language=xml
+          pomXml(
+            """
+              <project>
+                  <modelVersion>4.0.0</modelVersion>
+                  <groupId>com.example</groupId>
+                  <artifactId>example</artifactId>
+                  <version>1.0.0</version>
+                  <properties>
+                      <junit-jupiter.version>5.14.4</junit-jupiter.version>
+                  </properties>
+                  <dependencyManagement>
+                      <dependencies>
+                          <dependency>
+                              <groupId>org.junit</groupId>
+                              <artifactId>junit-bom</artifactId>
+                              <version>${junit-jupiter.version}</version>
+                              <type>pom</type>
+                              <scope>import</scope>
+                          </dependency>
+                      </dependencies>
+                  </dependencyManagement>
+              </project>
+              """,
+            spec -> spec.after(actual -> {
+                assertThat(actual)
+                  .containsPattern("<junit-jupiter\\.version>6\\.\\d+\\.\\d+</junit-jupiter\\.version>");
+                return actual;
+            })
+          )
+        );
+    }
+
+}