用PowerMock mock final类constructors

也相对简单，直接贴代码

被测方法

public class EmployeeServiceWithParam {
    public void createEmployee(final Employee employee) {
        EmployeeDaoWithParam employeeDao = new EmployeeDaoWithParam(false,
                Dialect.MYSQL);
        employeeDao.insertEmploye(employee);
    }
}

public class EmployeeDaoWithParam {
    public enum Dialect {
        MYSQL, ORACLE
    }

    public EmployeeDaoWithParam(boolean lazy, Dialect dialect) {
        throw new UnsupportedOperationException();
    }

    public void insertEmploye(Employee employee) {
        throw new UnsupportedOperationException();
    }
}

测试类：

@PrepareForTest(EmployeeServiceWithParam.class)
public class EmployeeServiceTestWithParamTest extends PowerMockTestCase{
    @ObjectFactory
    public ITestObjectFactory getObjectFactory() {
        return new PowerMockObjectFactory();
    }
    
    @Test
    public void test(){
        EmployeeDaoWithParam employeeDao = PowerMockito.mock(EmployeeDaoWithParam.class);
        try {
            PowerMockito.whenNew(EmployeeDaoWithParam.class).withArguments(false, EmployeeDaoWithParam.Dialect.MYSQL)
            .thenReturn(employeeDao);
            EmployeeServiceWithParam service = new EmployeeServiceWithParam();
            Employee employee = new Employee();
            service.createEmployee(employee);
            Mockito.verify(employeeDao).insertEmploye(employee);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
}