Remove support for JUnit 4

Closes gh-958

spring-restdocs-core/src/main/java/org/springframework/restdocs/JUnitRestDocumentation.java

@@ -1,77 +0,0 @@
-/*
- * Copyright 2014-2019 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.restdocs;
-
-import org.junit.rules.TestRule;
-import org.junit.runner.Description;
-import org.junit.runners.model.Statement;
-
-/**
- * A JUnit {@link TestRule} used to automatically manage the
- * {@link RestDocumentationContext}.
- *
- * @author Andy Wilkinson
- * @since 1.1.0
- */
-public class JUnitRestDocumentation implements RestDocumentationContextProvider, TestRule {
-
-	private final ManualRestDocumentation delegate;
-
-	/**
-	 * Creates a new {@code JUnitRestDocumentation} instance that will generate snippets
-	 * to <gradle/maven build path>/generated-snippet.
-	 */
-	public JUnitRestDocumentation() {
-		this.delegate = new ManualRestDocumentation();
-	}
-
-	/**
-	 * Creates a new {@code JUnitRestDocumentation} instance that will generate snippets
-	 * to the given {@code outputDirectory}.
-	 * @param outputDirectory the output directory
-	 */
-	public JUnitRestDocumentation(String outputDirectory) {
-		this.delegate = new ManualRestDocumentation(outputDirectory);
-	}
-
-	@Override
-	public Statement apply(final Statement base, final Description description) {
-		return new Statement() {
-
-			@Override
-			public void evaluate() throws Throwable {
-				Class<?> testClass = description.getTestClass();
-				String methodName = description.getMethodName();
-				JUnitRestDocumentation.this.delegate.beforeTest(testClass, methodName);
-				try {
-					base.evaluate();
-				}
-				finally {
-					JUnitRestDocumentation.this.delegate.afterTest();
-				}
-			}
-
-		};
-
-	}
-
-	@Override
-	public RestDocumentationContext beforeOperation() {
-		return this.delegate.beforeOperation();
-	}
-
-}

spring-restdocs-core/src/main/java/org/springframework/restdocs/ManualRestDocumentation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 the original author or authors.
+ * Copyright 2014-2025 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.
@@ -18,13 +18,15 @@ package org.springframework.restdocs;
 
 import java.io.File;
 
+import org.junit.jupiter.api.extension.Extension;
+
 /**
  * {@code ManualRestDocumentation} is used to manually manage the
  * {@link RestDocumentationContext}. Primarly intended for use with TestNG, but suitable
  * for use in any environment where manual management of the context is required.
  * <p>
- * Users of JUnit should use {@link JUnitRestDocumentation} and take advantage of its
- * Rule-based support for automatic management of the context.
+ * Users of JUnit should use {@link RestDocumentationExtension} and take advantage of its
+ * {@link Extension}-based support for automatic management of the context.
  *
  * @author Andy Wilkinson
  * @since 1.1.0