Springboot集成JUnit5优雅进行单元测试的示例

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
      <exclusions>
        <exclusion>
          <groupId>org.junit.vintage</groupId>
          <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

  @Test
  @DisplayName("测试断言equals")
  void testEquals() {
    assertTrue(3 < 4);
  }

  @Test
  @DisplayName("测试断言NotNull")
  void testNotNull() {
    assertNotNull(new Object());
  }

  @Test
  @DisplayName("测试断言抛异常")
  void testThrows() {
    ArithmeticException arithExcep = assertThrows(ArithmeticException.class, () -> {
      int m = 5/0;
    });
    assertEquals("/ by zero", arithExcep.getMessage());
  }

  @Test
  @DisplayName("测试断言超时")
  void testTimeOut() {
    String actualResult = assertTimeout(ofSeconds(2), () -> {
      Thread.sleep(1000);
      return "a result";
    });
    System.out.println(actualResult);
  }

  @Test
  @DisplayName("测试组合断言")
  void testAll() {
    assertAll("测试item商品下单",
        () -> {
          //模拟用户余额扣减
          assertTrue(1 < 2, "余额不足");
        },
        () -> {
          //模拟item数据库扣减库存
          assertTrue(3 < 4);
        },
        () -> {
          //模拟交易流水落库
          assertNotNull(new Object());
        }
    );
  }

  @RepeatedTest(3)
  @DisplayName("重复测试")
  void repeatedTest() {
    System.out.println("调用");
  }

  @ParameterizedTest
  @ValueSource(ints = {1, 2, 3})
  @DisplayName("参数化测试")
  void paramTest(int a) {
    assertTrue(a > 0 && a < 4);
  }

@SpringBootTest
@AutoConfigureMockMvc
@DisplayName("Junit5单元测试")
public class MockTest {
  //....
  @Nested
  @DisplayName("内嵌订单测试")
  class OrderTestClas {
    @Test
    @DisplayName("取消订单")
    void cancelOrder() {
      int status = -1;
      System.out.println("取消订单成功,订单状态为:"+status);
    }
  }
}