public async Task GetWorkspaceWummariesByUserTest() { var username = "******"; var userId = Guid.NewGuid(); var user = new User { Guid = userId }; List <Workspace> workspacesByUser = CreateWorkspaces(); _userRepo.Setup(repo => repo.UserExists(username)).ReturnsAsync(true); _userRepo.Setup(repo => repo.GetUserByUsername(username)).ReturnsAsync(user); _workspaceRepo.Setup(repo => repo.GetWorkspacesByUser(userId)).ReturnsAsync(workspacesByUser); var workspaceSummaries = await _service.GetWorkspaceSummariesByUser(username); Assert.NotNull(workspaceSummaries); Assert.IsType <List <WorkspaceSummaryDto> >(workspaceSummaries); }