EnumExampleTest.java.bk

package com.examplehub.basics;

import static org.junit.jupiter.api.Assertions.*;

import javax.swing.*;
import org.junit.jupiter.api.Test;

enum Color {
  RED(0, "red color"),
  BLACK(1, "black color"),
  WHITE(2, "white color");

  private final int colorValue;
  private final String colorDesc;

  Color(int colorValue, String colorDes) {
    this.colorValue = colorValue;
    this.colorDesc = colorDes;
  }

  @Override
  public String toString() {
    return this.colorDesc;
  }
}

enum WeekDay {
  SUN,
  MON,
  TUE,
  WED,
  THU,
  FRI,
  SAT
}

class EnumExampleTest {
  @Test
  void test() {
    WeekDay day = WeekDay.FRI;
    assertTrue(day == WeekDay.FRI);
    assertFalse(day == WeekDay.MON);
    assertEquals(WeekDay.FRI, day);

    WeekDay day1 = WeekDay.FRI;
    assertTrue(day == day1);
  }

  @Test
  void testName() {
    WeekDay day = WeekDay.FRI;
    assertEquals("FRI", day.name());
  }

  @Test
  void testOrdinal() {
    WeekDay day = WeekDay.FRI;
    assertEquals(5, day.ordinal());
  }

  @Test
  void testInit() {

    assertEquals(0, Color.RED.ordinal());
    assertEquals(1, Color.BLACK.ordinal());
    assertEquals(2, Color.WHITE.ordinal());
    assertEquals("white color", Color.WHITE.toString());
  }

  @Test
  void testSwitch() {

    WeekDay day = WeekDay.FRI;
    int result = -1;
    switch (day) {
      case SUN -> result = 7;
      case MON -> result = 1;
      case TUE -> result = 2;
      case WED -> result = 3;
      case THU -> result = 4;
      case FRI -> result = 5;
      case SAT -> result = 6;
      default -> result = 0;
    }
    assertEquals(5, result);
  }
}