TurtleTest.java

package org.teachingextensions.logo.tests;

import org.junit.Test;
import org.teachingextensions.approvals.lite.Approvals;
import org.teachingextensions.approvals.lite.reporters.DelayedClipboardReporter;
import org.teachingextensions.approvals.lite.reporters.DiffReporter;
import org.teachingextensions.approvals.lite.reporters.UseReporter;
import org.teachingextensions.approvals.lite.util.JUnitUtils;
import org.teachingextensions.approvals.lite.util.lambda.Function1;
import org.teachingextensions.logo.Turtle;
import org.teachingextensions.logo.utils.ColorUtils.PenColors;
import org.teachingextensions.logo.utils.ColorUtils.Wheel;

import java.awt.*;

import static org.junit.Assert.assertEquals;

@UseReporter({DiffReporter.class, DelayedClipboardReporter.class})
public class TurtleTest {
  @Test
  public void testShow() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    Approvals.verify(turtle.getImage());
  }

  @Test
  public void testRotate() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    turtle.turn(90);
    Approvals.verify(turtle.getImage());
  }

  @Test
  public void testRotate45() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    turtle.turn(45);
    Approvals.verify(turtle.getImage());
    assertEquals(45.0, turtle.getAngleInDegrees(), 0.02);
  }

  @Test
  public void testRotate45CounterClockwise() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    turtle.turn(-45);
    Approvals.verify(turtle.getImage());
  }

  @Test
  public void testMove() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    turtle.move(50);
    Approvals.verify(turtle.getImage());
  }

  @Test
  public void testMove45DegreesLeft() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    turtle.turn(-45);
    turtle.move(50);
    Approvals.verify(turtle.getImage());
  }

  @Test
  public void testPentagonCrazy() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    Wheel<Color> wheel = new Wheel<Color>();
    wheel.add(PenColors.Blues.SteelBlue);
    wheel.add(PenColors.Purples.DarkMagenta);
    wheel.add(PenColors.Blues.DarkSlateBlue);
    wheel.add(PenColors.Purples.Indigo);
    wheel.add(PenColors.Purples.DarkOrchid);
    Wheel<Integer> thickness = new Wheel<Integer>(1, 2, 3);
    for (int i = 0; i < 200; i++) {
      turtle.setPenColor(wheel.next());
      turtle.setPenWidth(thickness.next());
      turtle.move(i + 1);
      turtle.turn(360 / 5);
      turtle.turn(1);
    }
    Approvals.verify(turtle.getImage());
  }

  @Test
  public void testPenDown() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    for (int i = 0; i < 3; i++) {
      turtle.move(10);
      turtle.penUp();
      turtle.move(10);
      turtle.penDown();
    }
    Approvals.verify(turtle.getImage());
  }

  @Test
  public void testHide() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    turtle.move(50);
    turtle.hide();
    Approvals.verify(turtle.getImage());
  }

  @Test
  public void testSpeed() throws Exception {
    Integer[] speeds = {-5, 5, 15, Turtle.TEST_SPEED};
    Approvals.verifyAll("Speeds", speeds, new Function1<Integer, String>() {
      @Override
      public String call(Integer speed) {
        try {
          Turtle turtle = TurtleTestUtils.getTurtle();
          turtle.setSpeed(speed);
          return speed + " => " + turtle.getSpeed();
        } catch (Exception e) {
          return speed + " => " + e.getMessage();
        }
      }
    });
  }

  @Test
  public void testClear() throws Exception {
    JUnitUtils.assumeNotHeadless();
    Turtle turtle = TurtleTestUtils.getTurtle();
    turtle.clear();
    Approvals.verify(turtle.getImage());
  }
}