### Question:
UserManagementImpl implements UserManagementService { @Override public CommonResult insertUser(User user) { String pwd = SHAUtils.encodeData(user.getPassword()); user.setPassword(pwd); int count = userMapper.insert(user); if (count == 0) { return CommonResult.fail(); } return CommonResult.success(count); }  @Override CommonResult getUserById(Integer id); @Override CommonResult insertUser(User user); @Override CommonResult updateUserById(User user); @Override CommonResult deleteUserById(Integer id); @Override CommonResult listAllUsersAndRoles(); @Override CommonResult listAllRolesByDepartmentId(Integer departmentId);  }### Answer:
@Test public void testInsertUser() throws Exception { }