我想模拟一个继承的受保护方法.我不能直接从java代码调用这个方法,因为它是从另一个包中的类继承的.我找不到在 when(...)
I want to mock an inherited protected method. I can't call this method directly from java code as it is inherited from class that in another package. I can't find a way to specify this method to stub in in when(...)
package a;
public class A() {
protected int m() {}
}
package b;
public class B extends a.A {
// this class currently does not override m method from a.A
public asd() {}
}
// test
package b;
class BTest {
@Test
public void testClass() {
B instance = PowerMockito.spy(new B());
PowerMockito.when(instance, <specify a method m>).thenReturn(123);
//PowerMockito.when(instance.m()).thenReturn(123); -- obviously does not work
}
}
我查看了 PowerMockito.when
覆盖,这似乎都只用于私有方法!
I looked at PowerMockito.when
overrides and this seems that they are all for private methods only!
如何指定受保护的方法?
How to specify protected method?
简而言之:不能总是使用 when
来存根间谍;使用 doReturn
.
Nutshell: Can't always use when
to stub spies; use doReturn
.
假设 spy
和 doReturn
(都是 PowerMockito
)的静态导入:
Assuming static imports of spy
and doReturn
(both PowerMockito
):
@RunWith(PowerMockRunner.class)
@PrepareForTest(B.class)
public class BTest {
@Test public void testClass() throws Exception {
B b = spy(new B());
doReturn(42).when(b, "m");
b.asd();
}
}
您也可以@PrepareForTest(A.class)
并在when(a, "m")
上设置doReturn
.哪个更有意义取决于实际测试.
You could also @PrepareForTest(A.class)
and set up the doReturn
on when(a, "m")
. Which makes more sense depends on the actual test.
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