public async Task GetMonsterListAsync_LoadMonsterThenMapTheResponse() { const int groupId = 8; var monsters = new List <Monster>(); var monstersResponse = new List <MonsterResponse>(); _monsterService.GetMonstersForGroupAsync(_executionContext, groupId) .Returns(monsters); _mapper.Map <List <MonsterResponse> >(monsters) .Returns(monstersResponse); var result = await _controller.GetMonsterListAsync(_executionContext, groupId); result.Value.Should().BeSameAs(monstersResponse); }