Java/src/test/java/com/examplehub/basics/condition/SwitchExampleTest.java.bk at master · pearl-coder/Java · GitHub

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package com.examplehub.basics.condition;

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

import org.junit.jupiter.api.Test;

public class SwitchExampleTest {

  @Test
  void test1() {
    int option = 3;
    int result = 0;
    switch (option) {
      case 1:
        result = 1;
        break;
      case 2:
        result = 11;
        break;
      case 3:
        result = 111;
        break;
      case 4:
        result = 1111;
        break;
      default:
        result = -1;
        break;
    }
    assertEquals(111, result);
  }

  @Test
  void testBreak() {
    int option = 3;
    int result = 0;
    switch (option) {
      case 1:
        result = 1;
      case 2:
        result = 11;
      case 3:
        result = 111;
      case 4:
        result = 1111;
        break;
      default:
        result = -1;
    }
    assertEquals(1111, result);
  }

  @Test
  void testString() {
    String language = "java";
    int result = 0;
    switch (language) {
      case "Java":
        result = 0;
        break;
      case "java":
        result = 1;
        break;
      case "go":
        result = 2;
        break;
      case "kotlin":
        result = 3;
        break;
      case "python":
        result = 4;
      default:
        result = -1;
        break;
    }
    assertEquals(1, result);
  }

  @Test
  void testLambda() {
    int option = 3;
    int result = 0;
    switch (option) {
      case 1 -> result = 1;
      case 2 -> result = 2;
      case 3 -> result = 3;
      case 4 -> {
        result = result + 1;
        result = result * 2;
      }
      default -> result = -1;
    }
    assertEquals(3, result);
  }

  @Test
  void testLambda2() {
    int option = 3;
    int result = 0;
    result =
        switch (option) {
          case 1 -> 1;
          case 2 -> 2;
          case 3, 4 -> 3;
          default -> -1;
        };
    assertEquals(3, result);
  }

  @Test
  void testYield() {
    String language = "java";
    int result =
        switch (language) {
          case "kotlin" -> 1;
          case "java" -> {
            /* do something */
            int a = 4;
            int b = 3;
            yield a - b;
          }
          case "cpp", "go" -> 3;
          default -> {
            int a = 3, b = 4;
            yield a + b;
          }
        };
    assertEquals(1, result);
  }
}