Mockito。没有捕获任何参数值

Question

应如何更改此代码以便它不会抛出异常？

ArgumentCaptor<Date> argument = forClass(Date.class); 
verify(ps, times(0)).setDate(anyInt(), argument.capture()); 

typeHandler.setNonNullParameter(ps, 1, "20170120", DATE); 

assertEquals(new Date(2017, 01, 20), argument.getValue()); 

更多代码：

import org.apache.ibatis.type.BaseTypeHandler; 
import org.apache.ibatis.type.JdbcType; 
import org.joda.time.LocalDate; 
import org.joda.time.format.DateTimeFormat; 
import org.joda.time.format.DateTimeFormatter; 

import java.sql.*; 

public class DateStringTypeHandler extends BaseTypeHandler<String> { 

    private static final DateTimeFormatter YYYY_MM_DD = DateTimeFormat.forPattern("yyyyMMdd"); 

    @Override 
    public void setNonNullParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType) throws SQLException { 
     LocalDate localDate = YYYY_MM_DD.parseLocalDate(parameter); 
     ps.setDate(i, new Date(localDate.toDateTimeAtStartOfDay().getMillis())); 
    } 
} 

@RunWith(MockitoJUnitRunner.class) 
public class DateStringTypeHandlerTest { 

    @Mock 
    private PreparedStatement ps; 
    private DateStringTypeHandler typeHandler; 

    @Before 
    public void before() { 
     typeHandler = new DateStringTypeHandler(); 
    } 

    @Test 
    public void testSetNonNullParameterPreparedStatementIntStringJdbcType() throws SQLException { 
     ArgumentCaptor<Date> argument = forClass(Date.class); 
     verify(ps, times(0)).setDate(anyInt(), argument.capture()); 

     typeHandler.setNonNullParameter(ps, 1, "20170120", DATE); 

     assertEquals(new Date(2017, 01, 20), argument.getValue()); 
    } 
}  

verify抛出异常：

org.mockito.exceptions.base.MockitoException: 
No argument value was captured! 
You might have forgotten to use argument.capture() in verify()... 
...or you used capture() in stubbing but stubbed method was not called. 
Be aware that it is recommended to use capture() only with verify() 

Examples of correct argument capturing: 
    ArgumentCaptor<Person> argument = ArgumentCaptor.forClass(Person.class); 
    verify(mock).doSomething(argument.capture()); 
    assertEquals("John", argument.getValue().getName()); 

Answer 1

您应该调用类的方法测试第一。然后，您验证使用的俘虏：

@Test 
    public void testSetNonNullParameterPreparedStatementIntStringJdbcType() throws SQLException { 
     // Arrange 
     ArgumentCaptor<Date> argument = forClass(Date.class); 

     // Act 
     typeHandler.setNonNullParameter(ps, 1, "20170120", DATE); 

     // Assert    
     verify(ps).setDate(anyInt(), argument.capture());  
     assertEquals(new Date(2017, 01, 20), argument.getValue()); 
    } 

而且现在你可能不会需要times(..)说法。