问题

我正在尝试编写一个使用存根的测试，但是对其中一个方法进行模拟并未如预期般发生。

```java
class A {
 public static getInstance(){
  return new A();
 }
 public String getConn(){
 return "Hello";
 }
}

class B {
 public String createConn(){
  A instance  = A.getInstance();
  return instance.getConn();
 }
}

我的测试类：

@RunWith(PowerMockRunner.class)  
@PrepareForTest(A.class) 
public class TestClassB{  

  @Spy 
  B classB = new B();  

  @Test 
  public void testConn(){  

      PowerMockito.mockStatic(A.class);  
      given(A.getConn()).thenReturn("Welcome");  
      assertEquals("Welcome", classB.createConn()); 
  }

我想要对类B的createConn方法创建一个测试，当我获取连接时，我希望使用mockito而不是收到“Hello”，而是收到“Welcome”？

<details>
<summary>英文:</summary>

I am trying to write a test with stubbing but mocking one of the methods does not happen as expected.

class A {
public static getInstance(){
return new A();
}
public String getConn(){
return "Hello";
}
}

class B {
public String createConn(){
A instance = A.getInstance();
return instance.getConn();
}
}

My Test class:

    @RunWith(PowerMockRunner.class)  
    @PrepareForTest(A.class) 
    public class TestClassB{  
    
      @Spy 
      B classB = new B();  
    
      @Test 
      public void testConn(){  
    
          PowerMockito.mockStatic(A.class);  
          given(A.getConn()).thenReturn("Welcome");  
          assertEquals("Welcome", classB.createConn()); 
      }

I want to create a test on Class B, `createConn` method, and when I get the connection, instead of "Hello", I want to receive "Welcome" using mockito?


</details>


# 答案1
**得分**: 0

我找到了这个问题的解决方法。

      PowerMockito.mockStatic(A.class);
      PropertyManager mock = PowerMockito.mock(A.class);
      given(A.getInstance()).willReturn(mock);
      given(mock.getConn()).willReturn("Welcome");
      assertEquals("Welcome", classB.createConn());

<details>
<summary>英文:</summary>

I found the solution of the problem.

      PowerMockito.mockStatic(A.class);
      PropertyManager mock = PowerMockito.mock(A.class);
      given(A.getInstance()).willReturn(mock);
      given(mock.getConn()).willReturn(&quot;Welcome&quot;);
      assertEquals(&quot;Welcome&quot;, classB.createConn()); 


</details>