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/**
* Copyright (c) David Miller. All rights reserved.
* The use and distribution terms for this software are covered by the
* Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
* which can be found in the file epl-v10.html at the root of this distribution.
* By using this software in any fashion, you are agreeing to be bound by
* the terms of this license.
* You must not remove this notice, or any other, from this software.
**/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NUnit.Framework;
using Rhino.Mocks;
using clojure.lang;
using java.math;
namespace Clojure.Tests.LibTests
{
[TestFixture]
public class NumbersTests : AssertionHelper
{
#region Helpers
private void ExpectInt32(object x)
{
Expect(x, TypeOf(typeof(Int32)));
}
private void ExpectSameObject(object x, object y)
{
Expect(x, SameAs(y));
}
private void ExpectEqualObject(object x, object y)
{
Expect(x, EqualTo(y));
}
#endregion
#region reduce tests
[Test]
public void ReduceOnBigIntReducesSmallerValues()
{
BigInteger b1 = new BigInteger("123");
BigInteger b2 = new BigInteger("0");
BigInteger b3 = new BigInteger(Int32.MaxValue.ToString());
BigInteger b4 = new BigInteger(Int32.MinValue.ToString());
ExpectInt32(Numbers.reduce(b1));
ExpectInt32(Numbers.reduce(b2));
ExpectInt32(Numbers.reduce(b3));
ExpectInt32(Numbers.reduce(b4));
}
[Test]
public void ReduceOnBigIntReturnsLargerValues()
{
BigInteger b1 = new BigInteger("100000000000000000000", 16);
BigInteger b2 = b1.negate();
BigInteger b3 = new BigInteger("123456789012345678901234567890");
BigInteger b4 = b3.negate();
ExpectSameObject(b1, Numbers.reduce(b1));
ExpectSameObject(b2, Numbers.reduce(b2));
ExpectSameObject(b3, Numbers.reduce(b3));
ExpectSameObject(b4, Numbers.reduce(b4));
}
[Test]
public void ReduceOnLongReducesSmallerValues()
{
long b1 = 123;
long b2 = 0;
long b3 = Int32.MaxValue;
long b4 = Int32.MinValue;
ExpectInt32(Numbers.reduce(b1));
ExpectInt32(Numbers.reduce(b2));
ExpectInt32(Numbers.reduce(b3));
ExpectInt32(Numbers.reduce(b4));
}
[Test]
public void ReduceOnLongReturnsLargerValues()
{
long b1 = ((long)Int32.MaxValue) + 1;
long b2 = ((long)Int32.MinValue) - 1;
long b3 = 123456789000;
long b4 = -b3;
ExpectEqualObject(b1, Numbers.reduce(b1));
ExpectEqualObject(b2, Numbers.reduce(b2));
ExpectEqualObject(b3, Numbers.reduce(b3));
ExpectEqualObject(b4, Numbers.reduce(b4));
}
#endregion
#region divide tests
[Test]
[ExpectedException(typeof(ArithmeticException))]
public void DivideByZeroFails()
{
object o = Numbers.BIDivide(Numbers.BigIntegerOne, Numbers.BigIntegerZero);
}
[Test]
public void DivideReducesToIntOnDenomOne()
{
object o = Numbers.BIDivide(new BigInteger("75"), new BigInteger("25"));
Expect(o, EqualTo(3));
}
[Test]
public void DivideReturnsReducedRatio()
{
object o = Numbers.BIDivide(new BigInteger("42"), new BigInteger("30"));
Expect(o, TypeOf(typeof(Ratio)));
Ratio r = o as Ratio;
Expect(r.Numerator, EqualTo(new BigInteger("7")));
Expect(r.Denominator, EqualTo(new BigInteger("5")));
}
#endregion
}
}
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