在设置期望时,我们必须使用精确的参数匹配器。在你的情况下,它是
Matchers.any(Xray.class)、Matchers.any(Baz.class)
我已按如下方式修改了您的代码,并在测试方法的输出对象上添加了断言语句。
@RunWith(PowerMockRunner.class)
//@PrepareOnlyThisForTest(Foo.class) // we aren't looking at the byte code, I think
public class FooTest {
@Test
public void testBar_callsBarWithXray() throws Exception {
Baz baz = new Baz(); //POJOs
Alpha alpha = new Alpha();
alpha.set(new Xray());
Foo foo = new Foo();
Foo stub = PowerMockito.spy(foo); // using Mockito, as it's neither final nor "not spyable"
// NPE at org.powermock.api.mockito.internal.expectation.PowerMockitoStubberImpl.addAnswersForStubbing(PowerMockitoStubberImpl.java:67)
PowerMockito.doReturn("ok").when(stub, "bar", Matchers.any(Xray.class), Matchers.any(Baz.class));
String res = stub.bar(alpha, baz);
Assert.assertEquals("ok", res);
//Testing if bar(Xray, Baz) was called by bar(Alpha, Baz)
PowerMockito.verifyPrivate(stub).invoke("bar", Matchers.any(Xray.class), Matchers.any(Baz.class));
// Mockito's equivalent for a public method: verify(stub, times(1)).bar(any(Xray.class), any(Baz.class));
}
}
观察:当调用验证方法时,我们必须传递存根对象而不是实际对象,因为我们对存根对象设置了期望。由于我添加了断言语句来测试该方法,因此您不必在存根上验证它是否正常工作。
ADDED:我在公共和私有“bar”方法中添加了 sysout 语句,当我再次测试时,我发现公共 bar 方法的 sysout 语句没有打印。
这意味着上面的代码只模拟了公共方法,但没有模拟私有方法。
为了模拟私有“bar”方法,我尝试使用 MemberMatcher.method 进行另一种模拟,效果非常好。
import org.powermock.api.support.membermodification.MemberMatcher;
@RunWith(PowerMockRunner.class)
@PrepareForTest(Foo.class) // we need this
public class FooTest {
@Test
public void testBar_callsBarWithXray() throws Exception {
Baz baz = new Baz(); //POJOs
Alpha alpha = new Alpha();
alpha.set(new Xray());
Foo stub = PowerMockito.spy(new Foo());
PowerMockito.doReturn("ok")
.when(stub,
MemberMatcher.method(Foo.class,
"bar",
Xray.class, Baz.class))
.withArguments(Matchers.any(Xray.class), Matchers.any(Baz.class));
String res = stub.bar(alpha, baz);
Assert.assertEquals("ok", res);
//Testing if bar(Xray, Baz) was called by bar(Alpha, Baz)
PowerMockito.verifyPrivate(stub).invoke("bar", Matchers.any(Xray.class), Matchers.any(Baz.class));
// Mockito's equivalent for a public method: verify(stub, times(1)).bar(any(Xray.class), any(Baz.class));
}
output : public bar
测试方法也通过了。下面是具有 sysout 的 foo 方法。
private String bar(Xray xray, Baz baz) {
System.out.println("private bar");
return "Xray";
}
public String bar(Alpha alpha, Baz baz) {
System.out.println("public bar");
if(alpha.get() instanceof Xray) {
return bar((Xray)alpha.get(), baz);
} else if(alpha.get() instanceof Zulu) {
return bar((Zulu)alpha.get(), baz);
} else {
return null;
}
}