Junit相关


/**
     *     JUnit对于每个@Test方法
     *     1.实例化MainTest对象，如MainTest  test = new MainTest();
     *     2.执行@Before方法 test.serUp();
     *     3.执行@Test方法 test.test();
     *     4.执行@After方法 test.tearDown();
     */

TestableMock

https://github.com/alibaba/testable-mock

Mockito相关

Mockito注意事项

thenReturn会做类型检查，doReturn不会。
在使用Spy机制时，要小心使用thenReturn会有副作用，可以使用doReturn代替。

// 优先使用
when(user.getName()).thenReturn("John");
// 必要时再用这个
doReturn("John").when(user).getName();

参考资料：http://sangsoonam.github.io/2019/02/04/mockito-doreturn-vs-thenreturn.html

Mock接口

JDBCDialect为interface。

    @Mock
    JDBCDialect jdbcDialect;
    @InjectMocks
    MysqlSink mysqlSink = new MysqlSink();;
    @Before
    public void setUp () {
        MockitoAnnotations.initMocks(this);
    }
    @Test
    public void testGetOutputFormat() throws IllegalAccessException {
        when(user.getName()).thenReturn("John");
        // do something
    }

Mock私有成员

用的PowerMock组件。

MemberModifier.field(MysqlSink.class, "dbUrl").set(mysqlSink, "foo");

MemberModifier.stub(MemberMatcher.method(PrivateObject .class, "getPrivateString"))
  .toReturn("Power Mock");

Mock静态方法

https://stackoverflow.com/questions/21105403/mocking-static-methods-with-mockito/21114773#21114773

Maven POM文件配置

<properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <junit.version>4.12</junit.version>
  <mockito.version>2.21.0</mockito.version>
  <powermock.version>2.0.4</powermock.version>
</properties>

<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>${junit.version}</version>
  <scope>test</scope>
</dependency>
<dependency>
  <groupId>org.mockito</groupId>
  <artifactId>mockito-core</artifactId>
  <version>${mockito.version}</version>
  <scope>test</scope>
</dependency>
<dependency>
  <groupId>org.powermock</groupId>
  <artifactId>powermock-module-junit4</artifactId>
  <version>${powermock.version}</version>
  <scope>test</scope>
</dependency>
<dependency>
  <groupId>org.powermock</groupId>
  <artifactId>powermock-api-mockito2</artifactId>
  <version>${powermock.version}</version>
  <scope>test</scope>
  <exclusions>
    <exclusion>
      <groupId>org.mockito</groupId>
      <artifactId>mockito-core</artifactId>
    </exclusion>
  </exclusions>
</dependency>