[英]Unable to mock public methods of another class using powermockito
[英]Mock and verify 2 methods public static void and public static boolean from same class using PowerMockito
我有一个说ClassA
的类,它必须具有3-4个public static
方法,我的要求是模拟2个方法,一个是public static void
,另一个是public static boolean
。
下面的代码段
class ClassA{
public static boolean isConnected(){
//....
}
public static void doSomething(){
//....
}
public static void doSomethingMore(){
//....
}
}
现在我有另一个类,说ClassB
有method1()
调用ClassA.isConnected()
和ClassA.doSomething()
如下
class ClassB{
public void method1(){
if(ClassA.isConnected()){
//...
}else{
ClassA.doSomething()
}
}
}
现在我想对method1()
进行单元测试,所以我试图使用PowerMockito
模拟isConnected()
和doSomething()
,如下所示
@RunWith(PowerMockRunner.class)
@PrepareForTest({ClassA.class})
public class ClassBTest{
@Test
public void testMethod1{
//variables
ClassB classB = new ClassB();
//mock static non-void method
PowerMockito.mockStatic(ClassA.class);
PowerMockito.when(ClassA.isConnected()).thenReturn(false);
//mock static void method
PowerMockito.doNothing().when(ClassA.class);
ClassA.doSomething();
//execute
classB.method1();
//verify static non-void method called
PowerMockito.verifyStatic(times(1));
ClassA.isConnected();
//Verify static void method called
PowerMockito.verifyStatic(times(1));
**ClassA.doSomething();**//getting error at this line
}
}
错误:
Wanted but not invoked com.example.utils.common.ClassA.doSomething(
);
However, there were other interactions with this mockcom.example.utils.common.ClassA.isConnected();
com.example.utils.common.ClassA.doSomethingMore(
);
.
at org.powermock.core.MockGateway.doMethodCall(MockGateway.java:124)
at org.powermock.core.MockGateway.methodCall(MockGateway.java:63)
at com.example.utils.common.ClassA.doSomething(ClassA.java)
at com.example.utils.common.ClassBTest.testMethod1(ClassBTest.java:177)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:122)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
作为正确替代静态模型的替代方法。 您可以修改旧代码以提高可测试性。
下面的示例保留了静态方法,以防它们在代码库的其他地方使用。 显然,一旦删除了所有静态方法调用,您就可以从此处将其删除(然后也删除instance
)。
class ClassA{
private static ClassA instance = new ClassA();
public static boolean isConnected(){
return instance.isConnected();
}
public boolean isConnected(){
//....
}
public static void doSomething(){
instance.doSomething();
}
public void doSomething(){
//....
}
public static void doSomethingMore(){
instance.doSomethingMore();
}
public void doSomethingMore(){
//....
}
}
ClassB
有一个setter,您可以根据您的代码将其更改为构造函数依赖项或注入框架。 设置器受包装保护,以使其可见度最小。 注释VisibleForTesting是可选的,仅突出显示设置方法的原因。
class ClassB{
private ClassA classA = new ClassA();
@VisibleForTesting
void setClassA(ClassA classA) {
this.classA = classA;
}
public void method1(){
if(classA.isConnected()){
//...
}else{
classA.doSomething()
}
}
}
无需PowerMock即可简化测试:
public class ClassBTest{
@Test
public void testMethod1{
//variables
ClassB classB = new ClassB();
ClassA mockClassA = Mockito.mock(ClassA.class);
classB.setClassA(mockClassA);
// mock expected behaviour
Mockito.when(mockClassA.isConnected()).thenReturn(false);
//execute
classB.method1();
Mockito.verify(mockClassA, times(2)).isConnected();
Mockito.verify(mockClassA).doSomething();
}
}
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