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 () {
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.
}
}
我的测试:
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);
}
}
Test01 工作正常,但在 Test02 中我遇到了问题。 在 Test02 中,需要调用方法 processPath。它使用 mockNetwork 公共(public)最终变量。我不知道在哪里设置它们。它导致空异常。在上面的代码中,我尝试更改此字段的可访问性并设置它们,但现在我有消息“sinkIndex”的错误。
如何在 mockNetwork 中模拟 public final 变量? 我正在使用 Easymock。
最佳答案
您说您修改了 FlowNetwork
的源代码,因此您可以执行以下操作,这将导致更稳健的设计和更容易的可测试性:
- 封装这两个变量(即
private int sinkIndex
和int getSinkIndex()
) expect(mockNetwork.getSinkIndex()).andReturn(0).anyTimes();
猜测: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
。
如果你真的想使用public
,你可以试试FlowNetwork.class.getDeclaredField
。
关于java - easymock 如何模拟/设置公共(public)最终变量,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20937055/