public void When_getting_project_by_campaign_then_result_contains_only_projects_with_given_campaign_ID()
{
var campaign = new CampaignRepoTests().CreateCampaign();
CreateProject(campaign.Id);
var projectsByCampaign = repo.GetByCampaign(campaign.Id);
Assert.Contains(projectsByCampaign, item => item.CampaignId == campaign.Id);
Assert.DoesNotContain(projectsByCampaign, item => item.CampaignId != campaign.Id);
}