public void Should_subtract_zero_fractions()
{
Assert.That(FractionCalculator.Subtract(new Fraction(0, 0), new Fraction(0, 0)),
Is.EqualTo(new Fraction(0, 0)));
}
public void Should_subtract_negative_fractions(int minuendNumerator, int minuendDenominator, int subtrahendNumerator, int subtrahendDenominator, int expectedNumerator, int expectedDenominator)
{
Assert.That(FractionCalculator.Subtract(new Fraction(minuendNumerator, minuendDenominator), new Fraction(subtrahendNumerator, subtrahendDenominator)),
Is.EqualTo(new Fraction(expectedNumerator, expectedDenominator)));
}
public void Should_subtract_fractions_with_same_denominator()
{
Assert.That(FractionCalculator.Subtract(new Fraction(4, 5), new Fraction(1, 5)),
Is.EqualTo(new Fraction(3, 5)));
}
public void Should_subtract_fractions_with_different_denominator()
{
Assert.That(FractionCalculator.Subtract(new Fraction(3, 4), new Fraction(2, 5)),
Is.EqualTo(new Fraction(7, 20)));
}
public void Should_subtract_negative_whole_numbers(int minuendNumerator, int subtrahendNumerator, int expectedNumerator)
{
Assert.That(FractionCalculator.Subtract(new Fraction(minuendNumerator), new Fraction(subtrahendNumerator)),
Is.EqualTo(new Fraction(expectedNumerator)));
}