Java Mockito 1.9：格式化期望值（如自定义ArgumentMatcher中的“实际格式化程序”）

在Mockito 1.9.5中，我想在

verify

ing方法的（按顺序）调用参数时格式化实际值

Mockito在

ArcgumentMatcher

s中提供了一个可重写的

describeTo

方法，使我能够格式化期望值。 当使用PowerMockito的

whenNew

模拟诸如

DatagramPacket

之类的JRE类时，实际值的格式不是我喜欢的

在下面的示例中，我只对按顺序调用

DatagramPacket

的地址感兴趣。如果不是，我希望看到不匹配的实际值，而不是默认值

toString（）

name“

java.net。DatagramPacket@7546a399

”

我的自定义匹配器只能匹配

InetSocketAddress

例子 自定义匹配器：

static class IsDatagramForAddress extends ArgumentMatcher<DatagramPacket> {
    final InetSocketAddress addr;

    public IsDatagramForAddress(InetSocketAddress addr){
        this.addr = addr;
    }

    public boolean matches(Object dgp) {
        SocketAddress isa = ((DatagramPacket) dgp).getSocketAddress();
        boolean eq = isa.equals(addr);

        // System.out.println(dgp + ": " + isa + "< >" + addr + " == " + eq);

        return eq;
    }

    @Override
    public void describeTo(Description description) {
        description.appendText(addr == null ? null : addr.toString());
    }
}

private static DatagramPacket isDatagramForAddress(InetSocketAddress addr){
    return argThat(new IsDatagramForAddress(addr));
}

...

@Test
public void testSendIsCalledWithServersInOrder() throws Exception {

    InOrder order = inOrder(sock);

    order.verify(sock).send(isDatagramForAddress(new InetSocketAddress("8.8.8.2", 100)));
    order.verify(sock).send(isDatagramForAddress(new InetSocketAddress("8.8.8.1", 100)));
}

org.mockito.exceptions.verification.VerificationInOrderFailure:
Verification in order failure
Wanted but not invoked:
datagramSocket.send(/8.8.8.1:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
Wanted anywhere AFTER following interaction:
datagramSocket.send(
    java.net.DatagramPacket@7546a399
);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:90)

    at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
    ...

org.mockito.exceptions.verification.VerificationInOrderFailure:
Verification in order failure
Wanted but not invoked:
datagramSocket.send(/8.8.8.1:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
Wanted anywhere AFTER following interaction:
datagramSocket.send(/8.8.8.2:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:90)

    at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
    ...

这就是我得到的：

static class IsDatagramForAddress extends ArgumentMatcher<DatagramPacket> {
    final InetSocketAddress addr;

    public IsDatagramForAddress(InetSocketAddress addr){
        this.addr = addr;
    }

    public boolean matches(Object dgp) {
        SocketAddress isa = ((DatagramPacket) dgp).getSocketAddress();
        boolean eq = isa.equals(addr);

        // System.out.println(dgp + ": " + isa + "< >" + addr + " == " + eq);

        return eq;
    }

    @Override
    public void describeTo(Description description) {
        description.appendText(addr == null ? null : addr.toString());
    }
}

private static DatagramPacket isDatagramForAddress(InetSocketAddress addr){
    return argThat(new IsDatagramForAddress(addr));
}

...

@Test
public void testSendIsCalledWithServersInOrder() throws Exception {

    InOrder order = inOrder(sock);

    order.verify(sock).send(isDatagramForAddress(new InetSocketAddress("8.8.8.2", 100)));
    order.verify(sock).send(isDatagramForAddress(new InetSocketAddress("8.8.8.1", 100)));
}

org.mockito.exceptions.verification.VerificationInOrderFailure:
Verification in order failure
Wanted but not invoked:
datagramSocket.send(/8.8.8.1:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
Wanted anywhere AFTER following interaction:
datagramSocket.send(
    java.net.DatagramPacket@7546a399
);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:90)

    at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
    ...

org.mockito.exceptions.verification.VerificationInOrderFailure:
Verification in order failure
Wanted but not invoked:
datagramSocket.send(/8.8.8.1:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
Wanted anywhere AFTER following interaction:
datagramSocket.send(/8.8.8.2:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:90)

    at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
    ...

这就是我所期望的：

static class IsDatagramForAddress extends ArgumentMatcher<DatagramPacket> {
    final InetSocketAddress addr;

    public IsDatagramForAddress(InetSocketAddress addr){
        this.addr = addr;
    }

    public boolean matches(Object dgp) {
        SocketAddress isa = ((DatagramPacket) dgp).getSocketAddress();
        boolean eq = isa.equals(addr);

        // System.out.println(dgp + ": " + isa + "< >" + addr + " == " + eq);

        return eq;
    }

    @Override
    public void describeTo(Description description) {
        description.appendText(addr == null ? null : addr.toString());
    }
}

private static DatagramPacket isDatagramForAddress(InetSocketAddress addr){
    return argThat(new IsDatagramForAddress(addr));
}

...

@Test
public void testSendIsCalledWithServersInOrder() throws Exception {

    InOrder order = inOrder(sock);

    order.verify(sock).send(isDatagramForAddress(new InetSocketAddress("8.8.8.2", 100)));
    order.verify(sock).send(isDatagramForAddress(new InetSocketAddress("8.8.8.1", 100)));
}

org.mockito.exceptions.verification.VerificationInOrderFailure:
Verification in order failure
Wanted but not invoked:
datagramSocket.send(/8.8.8.1:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
Wanted anywhere AFTER following interaction:
datagramSocket.send(
    java.net.DatagramPacket@7546a399
);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:90)

    at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
    ...

org.mockito.exceptions.verification.VerificationInOrderFailure:
Verification in order failure
Wanted but not invoked:
datagramSocket.send(/8.8.8.1:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
Wanted anywhere AFTER following interaction:
datagramSocket.send(/8.8.8.2:100);
-> at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:90)

    at xxxx.XxxxTest.testSendIsCalledWithServersInOrder(XxxxTest.java:95)
    ...

问题归结起来

---

如何格式化/

toString（）

实际值？

您可以让

ArgumentMatcher

存储传递给它的最后一个对象，然后将其包含在

描述方法中。这可能看起来像这样

static class IsDatagramForAddress extends ArgumentMatcher<DatagramPacket> {
    final InetSocketAddress addr;
    DatagramPacket lastCompared;

    public IsDatagramForAddress(InetSocketAddress addr){
        this.addr = addr;
    }

    public boolean matches(Object dgp) {
        if (dgp instanceof DatagramPacket) {
            lastCompared = (DatagramPacket) dgp;
            SocketAddress isa = lastCompared.getSocketAddress();
            return isa.equals(addr);
        }

        return false;
    }

    @Override
    public void describeTo(Description description) {
        description.appendText(addr == null ? null : addr.toString());
        if (lastCompared != null) {
            description.appendText("Last socket address was " + lastCompared.getSocketAddress());
        }
    }
}

静态类IsDatagramForAddress扩展ArgumentMatcher{
最终inetsocketaddr地址；
最后比较数据包；
公共IsDatagramForAddress（InetSocketAddress地址）{
this.addr=addr；
}
公共布尔匹配（对象dgp）{
if（数据包的dgp实例）{
lastCompared=（DatagramPacket）dgp；
SocketAddress isa=lastCompared.getSocketAddress（）；
返回isa.equals（addr）；
}
返回false；
}
@凌驾
公共无效说明（说明）{
description.appendText（addr==null？null:addr.toString（））；
if（lastCompared！=null）{
description.appendText（“上一个套接字地址是”+lastCompared.getSocketAddress（））；
}
}
}
有趣而实用的方法+1美元。但是你没有收到支票，因为我希望有一个现成的解决方案。这样做的缺点是，不熟悉此解决方案的开发人员可能会对输出和报告功能感到困惑（在本例中，这对我来说并不重要：）。因此，只有Mockito团队为您开发新功能时，您才会接受您问题的答案？