using DesignPatterns.Factory;
using MbUnit.Framework;

namespace DesignPatterns.Test {
	[TestFixture]
	public class MoneyTest {
		[Test]
		public void Should_Be_Equal( ) {
			Assert.IsTrue( new Money( 5 ).Equals( new Money( 5 ) ) );
		}

		[Test]
		public void _Should_Be_Able_To_Add_Two_Monies_Together( ) {
			IMoney sum = new Money( 5 ).Add( new Money( 5 ) );
			Assert.IsTrue( sum.Equals( new Money( 10 ) ) );
		}

		[Test]
		public void _Should_Be_Able_To_Subtract_Two_Monies( ) {
			IMoney balance = new Money( 5 ).Subtract( new Money( 3 ) );
			Assert.IsTrue( balance.Equals( new Money( 2 ) ), "Should have a 2 monies" );
		}

		[Test]
		public void _Should_Be_Able_To_Subtract_Many_Monies( ) {
			IMoney balance = new Money( 5 ).Subtract( new Money( 3 ) ).Subtract( new Money( 1 ) );
			Assert.IsTrue( balance.Equals( new Money( 1 ) ), "Should have 1 monies" );
		}

		[Test]
		public void Should_Have_A_Currency( ) {
			new Money( 5, Currency.Canadian );
		}

		[Test]
		[ExpectedException( typeof( CannotAddMoniesException ) )]
		public void Should_Only_Add_Monies_Of_The_Same_Currency( ) {
			new Money( 5, Currency.Canadian ).Add( new Money( 5, Currency.American ) );
		}

		[Test]
		[ExpectedException( typeof( NegativeMoneyException ) )]
		public void Should_Not_Be_Able_To_Construct_Negative_Money( ) {
			new Money( -5 );
		}

		[Test]
		public void Should_Return_5_Monies( ) {
			Assert.IsTrue( new Money( 5 ).Equals( new Money( 5 ).Add( null ) ) );
		}
	}
}