public async Task DeleteEmployeeHours_WhenNotExists()
{
await dbContext.EmployeeHoursCollection.AddAsync(
new EmployeeHours { EmployeeHoursId = 101, Value = 100f, TimePeriod = "02.01.2019_08.01.2019", EmployeeId = 4 });
await dbContext.EmployeeHoursCollection.AddAsync(
new EmployeeHours { EmployeeHoursId = 102, Value = 100f, TimePeriod = "02.01.2019_08.01.2019", EmployeeId = 4 });
await dbContext.SaveChangesAsync();
var dao = new PostgresDataAccessObjectService(dbContext);
var coll = dao.GetEmployeeHoursForAnEmployee(4);
Assert.Equal(2, coll.Count);
dao.DeleteEmployeeHours(100);
coll = dao.GetEmployeeHoursForAnEmployee(4);
Assert.Equal(2, coll.Count);
}