MemoryMemberRepositorytest에서 findByName()메서드 실행시 오류가 납니다.

안녕하세요. MemoryMemberRepositoryTest실행시 오류가 나서 질문드립니다.

MemoryMemberRepositoryTest작동시 save(), findAll()은 정상적으로 작동이 되나 findByName()메서드에서 오류가 납니다.

package com.example.repository;

import java.util.List;
import java.util.Optional;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;


import com.example.domain.Member;

public class MemoryMemberRepositoryTest {
	
	MemoryMemberRepository repo = new MemoryMemberRepository();
	

	
	@Test
	public void save() {
		Member member = new Member();// 선언
		member.setName("spring");  //이름 설정
		
		repo.save(member); // 저장
		
		Member result=repo.findById(member.getId()).get();// id로 멤버를 찾음 result로 선언
		//optional로 매개변수를 저장해놔서 get()를 사용(권장하지 않음)
		//Assertions.assertEquals(member, result);
		
		org.assertj.core.api.Assertions.assertThat(member).isEqualTo(result);
		//member가 result와 같은지 확인
		//만약 두개가 다르면 다음으로 넘어가지 않음
		
		
	}
	@Test
	public void findByName() {
		Member member1 = new Member();
		member1.setName("spring1");
		repo.save(member1);
		
		Member mem2 = new Member();
		mem2.setName("spring2");
		repo.save(mem2);
		
		Member result= repo.findByName("spring1").get();
		
		org.assertj.core.api.Assertions.assertThat(result).isEqualTo(member1);
	}
	
	@Test
	public void findAll() {
		Member mem1 = new Member();
		mem1.setName("spring1");
		repo.save(mem1);
		
		Member mem2 = new Member();
		mem2.setName("spring2");
		repo.save(mem2);
		
		List<Member> result = repo.findAll();
		
		org.assertj.core.api.Assertions.assertThat(result.size()).isEqualTo(2);
	}
	

}

package com.example.repository;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;

import com.example.domain.Member;

public class MemoryMemberRepository implements MemberRepository{

	private static Map<Long, Member> store = new HashMap<>();
	private static long sequence = 0L;
	
	
	@Override
	public Member save(Member member) {
		member.setId(++sequence);  //아이디 세팅
		store.put(member.getId(), member);  //아이디 저장
		
		return member;
	}

	@Override
	public Optional<Member> findById(Long id) {
		
		return Optional.ofNullable(store.get(id));
	}

	@Override
	public Optional<Member> findByName(String name) {
		return store.values().stream().filter(member -> member.getName().equals(name)).findAny();
			//member.getName() 이  name이랑 같은가?
			
		
	}

	@Override
	public List<Member> findAll() {
		return new ArrayList<>(store.values());
	}

}

repository까지 다 확인해보았으나 에러를 찾지 못했습니다.