Add recipe to migrate JUnit 4's ExpectedException

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

@@ -0,0 +1,19 @@
+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 +1,64 @@
+package org.openrewrite.java.spring.test;
+
+import static org.openrewrite.java.Assertions.java;
+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;
+
+public 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");
+                  }
+              }    
+              """
+          )
+        );
+    }
+}