Open Rewrite

<dependency>
    <groupId>org.testng</groupId>
    <artifactId>testng</artifactId>
    <version>7.7.0</version>
    <scope>compile</scope>
</dependency>
<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-api</artifactId>
    <scope>compile</scope>
</dependency>

type: specs.openrewrite.org/v1beta/recipe
name: io.github.mboegers.openrewrite.TestNgToJUnitJupiter
displayName: Migrate Test NG tests to JUnit Jupiter
description: Migrate Test NG annotations and assertions ...
recipeList:
  - org.openrewrite.java.ChangeType:
      oldFullyQualifiedTypeName: org.testng.annotations.BeforeClass
      newFullyQualifiedTypeName: org.junit.jupiter.api.BeforeAll
      ignoreDefinition: true

import org.testng.Assert;

class MyTest {
  void testMethod() {
    boolean actual, expected;
    Assert.assertEquals(actual, expected, "😣");
  }
}

import org.junit.jupiter.api.Assertions;

class MyTest {
  void testMethod() {
    boolean actual, expected;
    Assertions.assertEquals(expected, actual, "😣");
  }
}

@RecipeDescriptor(
  name = "Replace `Assert#assertEquals(?, ?)`",
  description = "Replace `org.testng.Assert#assertEquals(?, ?)` with `org.junit.jupiter.api.Assertions#assertEquals(?, ?)`."
)
public static class MigrateObjectAssert {
  @BeforeTemplate
  void before(Object actual, Object expected) {
    Assert.assertEquals(actual, expected);
  }
  @AfterTemplate
  void after(Object actual, Object expected) {
    Assertions.assertEquals(expected, actual);
  }
}

import org.testng.annotations.Test;

class MyTest {
  @Test()
  void test() {}
}

import org.junit.jupiter.api.Test;

class MyTest {
  @Test
  void test() {}
}

import org.testng.annotations.Test;

class MyTest {
  @Test(enabled = false)
  void test() {}
}