Add recipe to migrate JUnit 4's ExpectedException

src/main/java/org/openrewrite/java/spring/test/ExpectedExceptionToAssertThrows.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2024 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.test;
+
+import org.openrewrite.NlsRewrite.Description;
+import org.openrewrite.NlsRewrite.DisplayName;
+import org.openrewrite.Recipe;
+
+public class ExpectedExceptionToAssertThrows extends Recipe {
+
+    @Override
+    public @DisplayName String getDisplayName() {
+        return "Migrate JUnit 4's ExpectedException";
+    }
+
+    @Override
+    public @Description String getDescription() {
+        return "Replace JUnit 4's ExpectedException with JUnit 5's assertThrows.";
+    }
+
+}

src/test/java/org/openrewrite/java/spring/test/ExpectedExceptionToAssertThrowsTest.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2024 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.
+ */
+
+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.openrewrite.java.Assertions.java;
+
+class ExpectedExceptionToAssertThrowsTest implements RewriteTest {
+
+    @Override
+    public void defaults(RecipeSpec spec) {
+        spec.recipe(new ExpectedExceptionToAssertThrows())
+          .parser(JavaParser.fromJavaVersion()
+            .classpathFromResources(new InMemoryExecutionContext(), "spring-boot-test", "spring-test")
+          );
+    }
+
+    @Test
+    @DocumentExample
+    void thatExpectedExceptionIsMigratedToAssertThrows() {
+        rewriteRun(
+          //language=java
+          java(
+            """
+              import org.junit.Rule;
+              import org.junit.Test;
+              import org.junit.rules.ExpectedException;
+
+              class SomeTest {
+
+                  @Rule
+                  public ExpectedException thrown = ExpectedException.none();
+
+                  @Test
+                  public void test() {
+                      thrown.expectMessage("exception");
+                      throw new RuntimeException("exception");
+                  }
+              } 
+              """,
+            """
+              import org.junit.Rule;
+              import org.junit.Test;
+              import org.junit.rules.ExpectedException;
+
+              class SomeTest {
+
+                  @Rule
+                  public ExpectedException thrown = ExpectedException.none();
+
+                  @Test
+                  public void test() {
+                      thrown.expectMessage("exception");
+                      throw new RuntimeException("exception");
+                  }
+              }    
+              """
+          )
+        );
+    }
+}