package com.example.nisum.MapStruct; import com.example.nisum.MapStruct.mapper.CollectionMapper; import org.junit.jupiter.api.Test; import org.mapstruct.Mapper; import org.mapstruct.factory.Mappers; import org.springframework.boot.test.context.SpringBootTest; import java.util.Arrays; import java.util.HashSet; import java.util.Set; import static org.junit.jupiter.api.Assertions.assertEquals; @SpringBootTest public class CollectionMapperTest { private CollectionMapper mapper = Mappers.getMapper(CollectionMapper.class); @Test public void testSet() { Set<Long> set = new HashSet<>(Arrays.asList(1L, 2L, 3L, 4L, 5L)); Set<String> convert = mapper.convert(set); assertEquals(set.size(),convert.size()); } }