java Powermock和Mockito。避免在模拟和存根同一类时对类进行静态初始化

Question

假设我有一个名为Util的类，带有静态字段：

public class Util {

    public static field = Param.getValue("param1");                 

}

类参数如下所示：

public class Param {

    public static field = SomeClass.getValue("someValue");

}

我想嘲弄和嘲弄Param。getValue（“param1”）位于Util内部，但同时我希望抑制Param类的静态初始化。我怎样才能做到这一点

这是我第一次尝试，但没用

@RunWith(PowerMockRunner.class)
@PrepareForTest({Param.class})
@SuppressStaticInitializationFor("py.com.company.Param")
public class Test {

     @Test
     public void testSomeMethod() {
         PowerMockito.mockStatic(Param.class);
         when(Param.getValue("value1")).thenReturn("someValue1");
     }

}

Answer 1

这对我有用。我没有得到任何输出，如果没有SomeClass#getValue

@RunWith(PowerMockRunner.class)
@SuppressStaticInitializationFor({"so35047166.Param"})
@PrepareForTest({Param.class})
public class UtilTest {
    @Before
    public void setUp() throws Exception {
        PowerMockito.mockStatic(Param.class);
    }

    @Test
    public void testFoo() throws Exception {
        final Util util = new Util();
        assertEquals("Util#foo", util.foo());
        assertEquals(null, Util.field);
    }
}

与：

// all in package so35047166;

public class Util {

    public static String field = Param.getValue("param1");

    public String foo() {
        return "Util#foo";
    }
}

public class Param {

    public static String field = SomeClass.getValue("someValue");

    public static String getValue(final String in) {
        System.out.println("Param#getValue");
        return "Param#getValue";
    }
}

public class SomeClass {
    public static String getValue(final String in) {
        System.out.println("SomeClass#getValue");
        return "SomeClass#getValue";
    }
}