Java easymock如何模拟/设置公共最终变量
我有一个接一个的类来测试模拟对象Java easymock如何模拟/设置公共最终变量,java,unit-testing,testing,junit,easymock,Java,Unit Testing,Testing,Junit,Easymock,我有一个接一个的类来测试模拟对象 public class FordFulkerson { FlowNetwork network; Search searchMethod; public FordFulkerson (FlowNetwork network, Search method) { this.network = network; this.searchMethod = method; } public boolean compute () { b
public class FordFulkerson {
FlowNetwork network;
Search searchMethod;
public FordFulkerson (FlowNetwork network, Search method) {
this.network = network;
this.searchMethod = method;
}
public boolean compute () {
boolean augmented = false;
while (searchMethod.findAugmentingPath(network.vertices)) {
processPath(network.vertices);
augmented = true;
}
return augmented;
}
protected void processPath(VertexInfo []vertices) {
int v = network.sinkIndex;
// Determine the amount. Goal is to find the smallest
int delta = Integer.MAX_VALUE;
while (v != network.sourceIndex) {
int u = vertices[v].previous;
// Over a forward edge,
int flow;
if (vertices[v].forward) {
flow = network.edge(u, v).capacity - network.edge(u, v).flow;
} else {
flow = network.edge(v, u).flow;
}
if (flow < delta) { delta = flow; }
v = u; // follow reverse path to source
}
// push minimal increment over the path
v = network.sinkIndex;
while (v != network.sourceIndex) {
int u = vertices[v].previous;
if (vertices[v].forward) {
network.edge(u, v).flow += delta;
} else {
network.edge(v, u).flow -= delta;
}
v = u; // follow reverse path to source
}
Arrays.fill(network.vertices, null); // reset for next iteration.
}
}
Test01工作正常,但在Test02中我遇到了问题。
在Test02中,需要调用processPath方法。它使用mockNetwork公共最终变量。我不知道把它们放在哪里。它导致了空异常。在上面的代码中,我试图更改此字段的可访问性并对其进行设置,但现在我在消息“sinkIndex”中出错
如何在mockNetwork中模拟公共最终变量?
我正在使用Easymock。您说您修改了
FlowNetwork
的源代码,因此您可以执行以下操作,从而实现更稳健的设计和更容易的测试性:
private int-sinkIndex
和int-getSinkIndex()
)expect(mockNetwork.getSinkIndex()).andReturn(0.anyTimes()代码>
mockNetwork.getClass()
正在返回一个没有状态(即没有字段)的cglib EasyMock代理,您可以在调试器中检查它。因此getDeclaredField()
返回null
如果您确实想使用
public
s,可以尝试使用FlowNetwork.class.getDeclaredField
。不,我无法更改源代码。这就是问题所在。我试图在Test02中更改它们的可访问性。啊,我明白了,你刚才的意思是setAccessible
,你试过我上次的编辑吗?你也可以试着不模仿网络,然后f.set
必须工作。我需要模仿网络,它的抽象。我试过你上次的编辑。现在我在Arrays.fill(network.vertices,Null)上有空指针异常;(与不改变变量相同)好的,我已经处理好了。我还需要设置与这两个变量相同的顶点。感谢您,从createMock
返回的任何对象的每个字段都是null
(或默认原语)。
public class FordFulkersonMockTest {
private FordFulkerson classUnderTest;
private FlowNetwork mockNetwork;
private Search mockSearch;
@Before
public void setUp() {
mockNetwork = createMock(FlowNetwork.class);
mockSearch = createMock(Search.class);
classUnderTest = new FordFulkerson(mockNetwork, mockSearch );
}
@Test
public void test01() {
expect(mockSearch.findAugmentingPath(null)).andReturn(false);
replay(mockSearch);
boolean res = classUnderTest.compute();
assertEquals(false, res);
verify(mockSearch);
}
@Test
public void test02() {
expect(mockSearch.findAugmentingPath(null)).andReturn(true);
try{
Field f = mockNetwork.getClass().getDeclaredField("sinkIndex");
f.setAccessible(true);
f.set(mockNetwork, 0);
f = mockNetwork.getClass().getDeclaredField("sourceIndex");
f.setAccessible(true);
f.set(mockNetwork, 0);
}catch(Exception e)
{
fail(e.getMessage());
}
replay(mockNetwork);
replay(mockSearch);
boolean res = classUnderTest.compute();
assertEquals(true, res);
verify(mockSearch);
}
}