Use xmlunit-legacy instead of xmlunit (#386)

* Use xmlunit-legacy instead of xmlunit

- xmlunit is not compatible with JUnit5 hence we need to migrate it

Signed-off-by: Peter Puškár <[email protected]>

* Add license header

Signed-off-by: Peter Puškár <[email protected]>

* Remove unneeded dependency

Signed-off-by: Peter Puškár <[email protected]>

* Adopt newVersion 2.x for xmlunit

---------

Signed-off-by: Peter Puškár <[email protected]>
Co-authored-by: Tim te Beek <[email protected]>

Author: puskarpeter

src/main/resources/META-INF/rewrite/junit5.yml

@@ -87,6 +87,7 @@ recipeList:
   - org.openrewrite.java.testing.junit5.AddMissingNested
   - org.openrewrite.java.testing.hamcrest.AddHamcrestIfUsed
   - org.openrewrite.java.testing.junit5.UpgradeOkHttpMockWebServer
+  - org.openrewrite.java.testing.junit5.UseXMLUnitLegacy
   - org.openrewrite.java.dependencies.RemoveDependency:
       groupId: junit
       artifactId: junit
@@ -266,3 +267,20 @@ recipeList:
   - org.openrewrite.java.testing.cleanup.AssertEqualsNullToAssertNull
   - org.openrewrite.java.testing.cleanup.AssertFalseNullToAssertNotNull
   - org.openrewrite.java.testing.cleanup.AssertionsArgumentOrder
+---
+type: specs.openrewrite.org/v1beta/recipe
+name: org.openrewrite.java.testing.junit5.UseXMLUnitLegacy
+displayName: Use XMLUnit Legacy for JUnit 5
+description: Migrates XMLUnit 1.x to XMLUnit legacy 2.x
+tags:
+  - testing
+  - junit
+  - xmlunit
+recipeList:
+  - org.openrewrite.maven.ChangeDependencyGroupIdAndArtifactId:
+      oldGroupId: xmlunit
+      oldArtifactId: xmlunit
+      newGroupId: org.xmlunit
+      newArtifactId: xmlunit-legacy
+      newVersion: 2.x
+---

src/test/java/org/openrewrite/java/testing/junit5/UseXMLUnitLegacyTest.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2023 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.testing.junit5;
+
+import org.junit.jupiter.api.Test;
+import org.openrewrite.InMemoryExecutionContext;
+import org.openrewrite.config.Environment;
+import org.openrewrite.java.JavaParser;
+import org.openrewrite.test.RecipeSpec;
+import org.openrewrite.test.RewriteTest;
+
+import static org.openrewrite.java.Assertions.mavenProject;
+import static org.openrewrite.maven.Assertions.pomXml;
+
+public class UseXMLUnitLegacyTest implements RewriteTest {
+    @Override
+    public void defaults(RecipeSpec spec) {
+        spec
+          .recipe(Environment.builder()
+            .scanRuntimeClasspath()
+            .build()
+            .activateRecipes("org.openrewrite.java.testing.junit5.UseXMLUnitLegacy"));
+    }
+
+    @Test
+    void shouldMigrateMavenDependency() {
+        rewriteRun(
+          mavenProject("project",
+            //language=xml
+            pomXml(
+              """
+                <project>
+                  <modelVersion>4.0.0</modelVersion>
+                  <groupId>com.example</groupId>
+                  <artifactId>demo</artifactId>
+                  <version>0.0.1-SNAPSHOT</version>
+                  <dependencies>
+                    <dependency>
+                      <groupId>xmlunit</groupId>
+                      <artifactId>xmlunit</artifactId>
+                      <version>1.6</version>
+                    </dependency>
+                  </dependencies>
+                </project>
+                """,
+              """
+                <project>
+                  <modelVersion>4.0.0</modelVersion>
+                  <groupId>com.example</groupId>
+                  <artifactId>demo</artifactId>
+                  <version>0.0.1-SNAPSHOT</version>
+                  <dependencies>
+                    <dependency>
+                      <groupId>org.xmlunit</groupId>
+                      <artifactId>xmlunit-legacy</artifactId>
+                      <version>2.9.1</version>
+                    </dependency>
+                  </dependencies>
+                </project>
+                """
+            )
+          )
+        );
+    }
+}