JUnit单元测试

<dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
</dependency>

import org.junit.Assert;
 
 
/**
* @author wzm
* @version 1.0.0
* @date 2020/1/24 15:25
**/
public class MyTest {
    private static void test(int x) {
        int c = 10 + 20;
        int a = 12 * 100 / x;
        Assert.assertTrue("expected a == c ,but a != c", a == c);
        System.out.println("a == c");
    }
 
 
    public static void main(String[] args) {
        int x = 10;
        test(x);
    }
}

import org.junit.Assert;
 
 
/**
* @author wzm
* @version 1.0.0
* @date 2020/1/24 15:25
**/
public class MyTest {
    private static void test(int x) {
        int c = 10 + 20;
        int a = 12 * 100 / x;
        Assert.assertTrue("expected a == c ,but a != c", a == c);
        System.out.println("a == c");
    }
 
 
    public static void main(String[] args) {
        int x = 40;
        test(x);
    }
}

assertTrue
 
assertFalse
 
assertEquals
 
assertNotEquals
 
assertArrayEquals
 
...

import org.junit.*;
 
public class MyTestTest {
 
    public MyTestTest() {
        System.out.println("--new MyTestTest()");
    }
 
    @BeforeClass
    public static void setUpBeforeClass() {
        System.out.println("--BeforeClass()");
    }
 
    @AfterClass
    public static void tearDownAfterClass() {
        System.out.println("--AfterClass()");
    }
 
    @Before
    public void setUp() {
        System.out.println("--Before()");
    }
 
    @After
    public void tearDown() {
        System.out.println("--After()");
    }
 
    @Test
    public void testA() {
        System.out.println("--testA()");
    }
 
    @Test
    public void testB() {
        System.out.println("--testB()");
    }
 
    @Test
    public void testC() {
        System.out.println("--testC()");
    }
}

@Test(timeout = 1000)
public void testA() {
    System.out.println("--testA()");
}

@Test(expected = ArithmeticException.class)
　　public void testException() {
　　int i = 1 / 1;
}

java.lang.AssertionError: Expected exception: java.lang.ArithmeticException