### Question:
MemberServiceImpl extends ServiceImpl<MemberMapper, Member> implements MemberService { @Override public MemberDto getByUsername(@NonNull String username) { Member member = memberMapper.selectByUsername(username); return convertService.convertMember(member); }  @Override MemberDto getByUsername(@NonNull String username);  }### Answer:
@Test public void getByUsername() { Assert.assertNotNull(memberService.getByUsername("yoke")); }