import static org.junit.Assert.assertEquals;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

public class TestJunitRevPolishCalc {
  String str;
  String split_array[];

  @Before
  public void setUp() {
    String str = "34+";
    split_array = new String[10];
  }

  @Test

  public void TesttArray() {
    int first;
    split_array = str.split("");
    first = Integer.parseInt(split_array[0]);
    assertEquals(first, 3, 0f);
  }
}