JUnit 4 test can be JUnit 5

Reports JUnit 4 tests that can be automatically migrated to JUnit 5. While default runners are automatically convertible, custom runners, method- and field- rules are not and require manual changes.

Example:

import org.junit.Assert;
import org.junit.Test;

public class RelevantTest {
  @Test
  public void testIt() {
    Assert.assertEquals("expected", "actual");
  }
}

After the quick-fix is applied:

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

public class RelevantTest {
  @Test
  public void testIt() {
    Assertions.assertEquals("expected", "actual");
  }
}

This inspection requires that the JUnit 5 library is available in the classpath, and JDK 1.8 or later is configured for the project.

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Java, 233.SNAPSHOT

Last modified: 13 July 2023