Android Open Source - Game-of-thrones-trivia General Algorithms Test

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License

The source code is released under:

MIT License

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Java Source Code

package com.Spartacus.Trivia.utilTest;
//ww w .j  a va2s .c o  m
import static org.junit.Assert.assertTrue;
import junit.framework.Assert;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.GameOfThrones.Trivia.util.GeneralAlgorithms;

public class GeneralAlgorithmsTest {

  @Before
  public void setUp() throws Exception {
  }

  @After
  public void tearDown() throws Exception {
  }

  @Test
  public void shuffleArrayTestSuccessful() {
    Integer[] temp = new Integer[9];
    temp[0] = -1;
    temp[1] = 0;
    temp[2] = 1;
    temp[3] = 2;
    temp[4] = 3;
    temp[5] = 4;
    temp[6] = -7;
    temp[5] = -100;
    temp[7] = 1001;
    temp[8] = 1002;
    Integer[] shuffledTemp = (Integer[]) GeneralAlgorithms
        .shuffleArray(temp);
    boolean onePosChanged = false;
    for (int i = 0; i < temp.length; i++) {
      System.out.println(temp[i] + " != " + shuffledTemp[i]);
      if (temp[i] != shuffledTemp[i]) {
        onePosChanged = true;
      }
    }
    System.out.println("Alot of the positions should have changed\n");
    assertTrue(
        "At least one of the position changed after a shuffle. Probabilstic function"
            + " therefore there is an extremly small change of false negative.",
        onePosChanged);
  }

  @Test
  public void getWeightedProbabilityNoData() {
    Assert.assertEquals("No data", -1,
        GeneralAlgorithms.getWeightedProbability(new int[] {}));

  }

  @Test
  public void getWeightedProbabilityNegativeData() {
    Assert.assertEquals("Negative data", -2,
        GeneralAlgorithms.getWeightedProbability(new int[] { 9, -9 }));
  }

  @Test
  public void getWeightedProbabilityAllZeroData() {
    Assert.assertEquals("Zero data", -3,
        GeneralAlgorithms.getWeightedProbability(new int[] { 0, 0 }));

  }

  @Test
  public void getWeightedProbabilityOneEntry() {
    Assert.assertEquals(0,
        GeneralAlgorithms.getWeightedProbability(new int[] { 6 }));
  }

  @Test
  public void getWeightedProbabilitySuccessful() {
    int[] temp = new int[4];
    temp[0] = 8;
    temp[1] = 3;
    temp[2] = 1000;
    temp[3] = 1000;
    int selected = GeneralAlgorithms.getWeightedProbability(temp);
    boolean validAnswer = selected > 0 && selected < 4;
    System.out
        .println("selected (should be 3 or 2 very often)=" + selected);
    Assert.assertTrue("Value in acceptable range", validAnswer);
  }

}

Java Source Code List