我有一个名为Class的类，它使用另一个类Maps，它实现了一个带有默认类的接口IMap。
public interface IMap<K,V> {
K fromSource(V source);
default List<K> fromSourceList(List<V> sourceList) {
List<K> result= new ArrayList<>();
for (V source: sourceList) {
result.add(this.fromSource(source));
}
return result;
}
}
我尝试单元测试，用Mockito，我的类直接从SourceList调用，但是，我不能存根默认方法。
我试着用间谍或模拟Mapping.java
你能帮我吗？
另一个输入：我需要测试使用默认界面的Class，如下所示：
public class Mapping implements IMap<String,String> {
@Override
public String fromSource(String source) {
return source.append(".");
}
}
public class Class {
private final Mapping mapping = new Mapping();
public String doSomething(String string) {
List<String> listStr = new ArrayList<>();
listStr.add(string);
listStr.add("This is a test");
List<String> manipulatedString = mapping.fromSourceList(listStr);
return manipulatedString.toString();
}
}
@RunWith(MockitoJUnitRunner.class)
public class ClassTest {
@Mock
IMap<String, String> map;
@InjectMock
ClassTest class;
@Test
public void testMapMock(){
List<String> target = new ArrayList<>();
target.add("test.");
target.add("This is a test.");
when(map.fromSourceList(any())).thenReturn(target);
String result = class.doSomething("test");
Assert.assertEquals("test.This is a test.", result);
}
}
模拟示例：
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.when;
@RunWith(MockitoJUnitRunner.class)
public class TestMap {
@Mock
IMap<String, String> map;
@Test
public void testMapMock(){
List<String> source = Stream.of("A").collect(Collectors.toList());
List<String> target = Stream.of("B").collect(Collectors.toList());
when(map.fromSourceList(any())).thenReturn(target);
Assert.assertEquals(map.fromSourceList(source), target);
}
}
您需要通过构造函数将mock注入到您的类中。
测试以下一种方式为我工作：
public class Mapping implements IMap<String,String> {
@Override
public String fromSource(String source) {
return source + ".";
}
}
public class Class {
private IMap<String, String> mapping;
public Class(IMap<String, String> mapping) {
this.mapping = mapping;
}
public String doSomething(String string) {
List<String> listStr = new ArrayList<>();
listStr.add(string);
listStr.add("This is a test");
List<String> manipulatedString = mapping.fromSourceList(listStr);
return manipulatedString.toString();
}
}
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import java.util.ArrayList;
import java.util.List;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.when;
@RunWith(MockitoJUnitRunner.class)
public class ClassTest {
@Mock
IMap<String, String> map;
@InjectMocks
Class ob;
@Test
public void testMapMock(){
List<String> target = new ArrayList<>();
target.add("test.");
target.add("This is a test.");
when(map.fromSourceList(any())).thenReturn(target);
String result = ob.doSomething("test");
Assert.assertEquals("[test., This is a test.]", result);
}
}
