AssumingConnection.java

public class AssumingConnection implements TestRule {

  private ConnectionChecker checker;

  public AssumingConnection(ConnectionChecker checker) {
    this.checker = checker;
  }

  @Override
  public Statement apply(Statement base, Description description) {
    return new Statement() {
      @Override
      public void evaluate() throws Throwable {
        if (!checker.connect()) {
          throw new AssumptionViolatedException("Skipping Test!"); 
        } else {
          base.evaluate();
        }
      }
    };
  }

}