OnJava8-Examples/annotations/AtUnitExample4.java

// annotations/AtUnitExample4.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
package annotations;
import java.util.*;
import onjava.atunit.*;
import onjava.*;

public class AtUnitExample4 {
  static String theory = "All brontosauruses " +
    "are thin at one end, much MUCH thicker in the " +
    "middle, and then thin again at the far end.";
  private String word;
  private Random rand = new Random(); // Time-based seed
  public AtUnitExample4(String word) { this.word = word; }
  public String getWord() { return word; }
  public String scrambleWord() {
    // <* Improve this: *>
    List<Character> chars = new ArrayList<>();
    for(Character c : word.toCharArray())
      chars.add(c);
    Collections.shuffle(chars, rand);
    StringBuilder result = new StringBuilder();
    for(char ch : chars)
      result.append(ch);
    return result.toString();
  }
  @TestProperty static List<String> input =
    Arrays.asList(theory.split(" "));
  @TestProperty
    static Iterator<String> words = input.iterator();
  @TestObjectCreate static AtUnitExample4 create() {
    if(words.hasNext())
      return new AtUnitExample4(words.next());
    else
      return null;
  }
  @Test boolean words() {
    System.out.println("'" + getWord() + "'");
    return getWord().equals("are");
  }
  @Test boolean scramble1() {
    // Change to a specific seed to get verifiable results:
    rand = new Random(47);
    System.out.println("'" + getWord() + "'");
    String scrambled = scrambleWord();
    System.out.println(scrambled);
    return scrambled.equals("lAl");
  }
  @Test boolean scramble2() {
    rand = new Random(74);
    System.out.println("'" + getWord() + "'");
    String scrambled = scrambleWord();
    System.out.println(scrambled);
    return scrambled.equals("tsaeborornussu");
  }
  public static void main(String[] args) throws Exception {
    System.out.println("starting");
    OSExecute.command("java -cp .. " +
      "onjava.atunit.AtUnit AtUnitExample4.class");
  }
}
/* Output:
starting
annotations.AtUnitExample4
  . words 'All'
(failed)
  . scramble2 'brontosauruses'
tsaeborornussu

  . scramble1 'are'
rae
(failed)
(3 tests)

>>> 2 FAILURES <<<
  annotations.AtUnitExample4: words
  annotations.AtUnitExample4: scramble1
*/