week-5-day-3 Assignment

gistfile1.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace week5day3
{
    class LibraryManager
    {
        public LibraryManager()
        {
            checkedOutBooks = new List<Library>();
        }
        public List<Library> checkedOutBooks; 

        public Student SaveStudent(Student s)
        {
            s.Age = (int)(DateTime.Now.Subtract(s.dob).TotalDays / 365);
            return s;
        }
        public void CreateBook()
        {

        }
        public Library CheckOutBook(Book b, Student s, DateTime borrowdate)
        {
            var result = new Library();
            if (checkedOutBooks.Any())
            {
                result.Id = checkedOutBooks.Max(x => x.Id) + 1;
            }
            else
            {
                result.Id = 1;
            }
            result.Book = b;
            result.Student = s;
            result.BorrowDate = borrowdate;
            result.ExpectedReturnDate = borrowdate.AddMonths(1);
            checkedOutBooks.Add(result);
            return result;
        }

        internal object AddStudent(Student s)
        {
            throw new NotImplementedException();
        }

        internal Library CheckInBook(Book b, DateTime returndate)
        {
            var result = checkedOutBooks.FirstOrDefault(x => x.Book.Id == b.Id && x.ExpectedReturnDate != null);
            result.ExpectedReturnDate = null;
            result.ActualReturnDate = returndate;
            return result;
        }
    }
}

gistfile2.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace week5day3
{
    class Library
    {
        internal object ExpectedReturnDate;

        public object BorrowDate { get; internal set; }
        public DateTime? ActualReturnDate { get; internal set; }
        public int Id { get; internal set; }
        public Book Book { get; internal set; }
        public Student Student { get; internal set; }

        public static implicit operator Library(LibraryManager v)
        {
            throw new NotImplementedException();
        }

        internal Library CheckOutBook(Student s, Book b)
        {
            throw new NotImplementedException();
        }
    }
}

gistfile3.txt

namespace week5day3
{
    internal class Book
    {
        public int Id { get; set; }
        public string Author { get; set; }
        public string ISBN { get; set; }

    }
}

gistfile4.txt

using System;

namespace week5day3
{
    public class Student
    {
        public DateTime dob;
        public int Id { get; set; }
        public int Age { get; internal set; }
        public string Name { get; internal set; }
     
    }
}

gistfile5.txt

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace week5day3
{
    [TestClass]
    public class LibraryManagerTests

    {

        // When adding a student, their age is calculated correctly
        [TestMethod]
            public void CorrectStudentAge()
            {
            var s = new Student();
            s.Name = "Jo";
            var expectedAge = 27;
            var daysInYear = 365;
            s.dob = DateTime.Now.AddDays(-daysInYear * expectedAge);
            LibraryManager mgr = new LibraryManager();
            var savedStudent = mgr.SaveStudent(s);
            Assert.AreEqual(expectedAge, savedStudent.Age);
            }

        
        //When checking out a book the check out date is set correctly and the expected return date is set to 1 month after the check out date.
        [TestMethod]
        public void CheckedOoutBookDatesSetCorrectly()
        {
            var s = new Student();
            var b = new Book();
            var checkOutDate = DateTime.Parse("5/5/2000");
            LibraryManager mgr = new LibraryManager();
            Library result = mgr.CheckOutBook(b, s, checkOutDate);
            Assert.AreEqual(checkOutDate, result.BorrowDate);
            Assert.AreEqual(checkOutDate.AddMonths(1), result.ExpectedReturnDate);
        }




        //When a book is checked in - the actual return date is the right day and the expected return date is set to null.

        [TestMethod]
           
            public void CheckedInBookDatesSetCorrectly()
        {
            var s = new Student();
            var b = new Book();
            LibraryManager mgr = new LibraryManager();
            mgr.CheckOutBook(b, s, DateTime.Parse("5/5/2000"));
            Library result2 = mgr.CheckInBook(b, DateTime.Parse("5/9/2000"));
            Assert.AreEqual(DateTime.Parse("5/5/2000"), result2.BorrowDate);
            Assert.IsNull(result2.ExpectedReturnDate);
            Assert.AreEqual(DateTime.Parse("5/9/2000"), result2.ActualReturnDate);

        }
      

    }
}