public void ToStringDoesSomethingReasonable()
{
BigInteger n1 = BigInteger.Create(30);
BigInteger d1 = BigInteger.Create(60);
Ratio r1 = new Ratio(n1, d1);
Expect(r1.ToString(), EqualTo("30/60"));
}
public void GetsThePiecesFromTheConstructedThing()
{
BigInteger n = BigInteger.Create(30);
BigInteger d = BigInteger.Create(60);
Ratio r = new Ratio(n, d);
Expect(r.numerator, SameAs(n));
Expect(r.denominator, SameAs(d));
}
public void RaionalizeWorksOnDoubles()
{
object r = Numbers.rationalize(0.0625);
Expect(r, InstanceOf(typeof(Ratio)));
Ratio rr = (Ratio)r;
Ratio ratio = new Ratio(BigInteger.Create(1), BigInteger.Create(16));
Expect(rr, EqualTo(ratio));
}
public void ToBigDecimalWithNoContextAndNoRoundingRequiredWorks()
{
BigInteger n1 = BigInteger.Create(1);
BigInteger d1 = BigInteger.Create(4);
Ratio r1 = new Ratio(n1, d1);
BigDecimal bd = r1.ToBigDecimal();
Expect(bd, EqualTo(BigDecimal.Parse("0.25")));
}
public void ToBigDecimalWithContextWorks()
{
BigInteger n1 = BigInteger.Create(1);
BigInteger d1 = BigInteger.Create(3);
Ratio r1 = new Ratio(n1, d1);
BigDecimal.Context c = new BigDecimal.Context(6, BigDecimal.RoundingMode.HalfUp);
BigDecimal bd = r1.ToBigDecimal(c);
Expect(bd, EqualTo(BigDecimal.Parse("0.333333")));
}
public void RationalizeTakesFractionToBigInteger()
{
BigDecimal bd = BigDecimal.Parse("123.45");
object r = Numbers.rationalize(bd);
Expect(r, InstanceOf(typeof(Ratio)));
Ratio rr = (Ratio)r;
Ratio ratio = new Ratio(BigInteger.Create(12345/5), BigInteger.Create(100/5));
Expect(rr, EqualTo(ratio));
}
public void EqualsReturnsTrueOnEquals()
{
BigInteger n1 = BigInteger.Create(30);
BigInteger d1 = BigInteger.Create(60);
Ratio r1 = new Ratio(n1, d1);
BigInteger n2 = BigInteger.Create(30);
BigInteger d2 = BigInteger.Create(60);
Ratio r2 = new Ratio(n2, d2);
Expect(r1.Equals(r2));
}
public void ToBigDecimalWithNoContextThrowsIfRoundingIsRequired()
{
BigInteger n1 = BigInteger.Create(1);
BigInteger d1 = BigInteger.Create(3);
Ratio r1 = new Ratio(n1, d1);
BigDecimal bd = r1.ToBigDecimal();
}
public void ToDoubleWorks()
{
BigInteger n1 = BigInteger.Create(1);
BigInteger d1 = BigInteger.Create(3);
Ratio r1 = new Ratio(n1, d1);
BigDecimal.Context c = new BigDecimal.Context(6, BigDecimal.RoundingMode.HalfUp);
double d = r1.ToDouble(null);
Expect(d, EqualTo(0.3333333333333333)); // precision = 16
}
public void ToDoubleWorks()
{
BigInteger n1 = BigInteger.Create(1);
BigInteger d1 = BigInteger.Create(3);
Ratio r1 = new Ratio(n1, d1);
double d = r1.ToDouble(null);
Expect(d, EqualTo(0.3333333333333333)); // precision = 16
}
/// <summary>
/// Determines of an object is equal to this object.
/// </summary>
/// <param name="obj">The object to compare to.</param>
/// <returns><value>true</value> if the object is equal to this object; <value>false</value> otherwise.</returns>
public override bool Equals(object obj)
{
Ratio r = obj as Ratio;
return(r != null && r._numerator.Equals(_numerator) && r._denominator.Equals(_denominator));
}
