嘲弄保护方法 [英] mocking protected method
问题描述
我想模拟一个继承的受保护方法。我无法直接从java代码调用此方法,因为它继承自另一个包中的类。我找不到一种方法来指定这种方法来存入当(...)
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
}
}
我看了 PowerMockito.when
覆盖,这似乎只是私有方法!
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?
推荐答案
Nutshell:当存在间谍时,不能总是使用;使用
doReturn
。
Nutshell: Can't always use when
to stub spies; use doReturn
.
假设静态导入 spy
并且 doReturn
( PowerMockito
):
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();
}
}
您还可以 @PrepareForTest (A.class)
并在($,m)$ c $时在上设置
doReturn
C>。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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